Ultraviolet Radiation and Plant Ecosystems

  • Thomas A. Day


This chapter addresses the impact of ambient and enhanced levels of ultravioletB radiation (UV-B, 280–320 nm) on terrestrial vascular plants, with a focus on findings published during the past 5 years. It discusses some of the more recent ideas regarding plant responses to ambient and enhanced UV-B levels and the possible mechanisms involved. This review is not meant to be exhaustive, and for additional topics readers are referred to Caldwell and Flint (1994), Björn (1996), Björn et al. (1996, 1997), Lumdsen (1997), Rozema et al. (1997a,b), and Caldwell et al. (1998). The past, current, and future UV-B environment of terrestrial plants is briefly reviewed. Because of difficulties in extrapolating from indoor studies to field situations, I focus on recent findings from field studies, with particular reference to those employing ambient UV-B filter exclusions and modulated UV-B supplements.


Ferulic Acid Photosynthetic Active Radiation Ozone Depletion Plant Cell Environ Plant Ecosystem 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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  1. Adamse, P., and Britz, S.J. 1992. Amelioration of UV-B damage under high irradiance. I: Role of photosynthesis. Photochem. Photobiol. 56:645–650.Google Scholar
  2. Ålenius, C.M., Vogelmann, T.C., and Bornman, J.F. 1995. A three-dimensional representation of the relationship between penetration of u.v.-B radiation and u.v.-screening pigments in leaves of Brassica napus. New Phytol. 131:297–302.Google Scholar
  3. Allen, D.J., McKee, I.F., Farage, P.K., and Baker, N.R. 1997. Analysis of limitations to CO2 assimilation on exposure of leaves of two Brassica napus cultivars to UV-B. Plant Cell Environ. 20:633–640.Google Scholar
  4. Allen, D.J., Nogués, S., and Baker, N.R. 1998. Ozone depletion and increased UV-B radiation: is there a real threat to photosynthesis? J. Exp. Bot. 49:1775–1788.Google Scholar
  5. Allen, D.J., Nogués, S., Morison, J.I.L., Greenslade, P.D., McLeod, A.R., and Baker, N.R. 1999. A thirty percent increase in UV-B has no impact on photosynthesis in wellwatered and droughted pea plants in the field. Global Change Biol. 5:235–244.Google Scholar
  6. Andrady, A.L., Amin, M.B., Hamid, S.H., Hu, X., and Torikai, A. 1995. Effects of increased solar ultraviolet radiation on materials. Ambio 24:191–196Google Scholar
  7. Babu, T.S., Jansen, M.A., Greenberg, B.M., Gaba, V., Malkin, S., Mattoo, A.K., and Edelman, M. 1999. Amplified degradation of photosystem II D 1 and D2 protein under a mixture of photosynthetically active radiation and UVB radiation: dependence on redox status of photosystem II. Photochem. Photobiol. 69:553–559.Google Scholar
  8. Baker, N.R., Nogués, S., and Allen, D.J. 1997. Photosynthesis and photoinhibition. In Plants and UV-B: Responses to Environmental Change, ed. P. J. Lumsden, pp. 95–111. Cambridge University Press, New York.Google Scholar
  9. Ballaré, C.L., Barnes, P.W., and Kendrick, R.E. 1991. Photomorphogenic effects of UVB radiation on hypocotyl elongation in wild type and stable-phytochrome-deficient mutant seedlings of cucumber. Physiol. Plant. 83:652–658.Google Scholar
  10. Ballaré, C.L., Barnes, P.W., and Flint, S.D. 1995. Inhibition of hypocotyl elongation by ultraviolet-B radiation in de-etiolating tomato seedlings. I. The photoreceptor. Physiol. Plant. 93:584–592.Google Scholar
  11. Ballaré, C.L., Barnes, P.W., Flint, S.D., and Price, S. 1995. Inhibition of hypocotyl elongation by ultraviolet-B radiation in de-etiolating tomato seedlings. II. Time-course, comparison with flavonoid responses and adaptive significance. Physiol. Plant. 93:593–601.Google Scholar
  12. Ballaré, C.L., Scopel, A.L., Stapleton, A.E., and Yanovsky, M.J. 1996. Solar ultravioletB radiation affects seedling emergence, DNA integrity, plant morphology, growth rate, and attractiveness to herbivore insects in Datura ferox. Plant Physiol. 112:161–170.Google Scholar
  13. Barnes, P.W., Flint, S.D., and Caldwell, M.M. 1987. Photosynthesis damage and protective pigments in plants from a latitudinal arctic/ alpine gradient exposed to supplemental UV-B radiation in the field. Arct. Alp. Res. 19:21–27.Google Scholar
  14. Barnes, P.W., Flint, S.D., and Caldwell, M.M. 1990. Morphological responses of crop and weed species of different growth forms to ultraviolet-B radiation. Am. J. Bot. 77:1354–1360.Google Scholar
  15. Barnes, P.W., Ballaré, C.L., and Caldwell, M.M. 1996. Photomorphogenic effects of UVB radiation on plants: consequences for light competition. J. Plant Physiol. 148:15–20.Google Scholar
  16. Beggs, C.J., and Wellmann, E. 1994. Photocontrol of flavonoid biosynthesis. In Photomorphogenesis in Plants, eds. R.E. Kendrick and G.H.M. Kronenberg, pp. 733–751. Kluwer, Dordrecht.Google Scholar
  17. Beyschlag, W., Barnes, P.W., Flint, S.D., and Caldwell, M.M. 1988. Enhanced UV-B irradiation has no effect on photosynthetic characteristics of wheat (Triticum aestivum L.) and wild oat (Avena fatua L.) under greenhouse and field conditions. Photosynthetica (Prague) 22:516–525.Google Scholar
  18. Björn, L.O. 1996. Effects of ozone depletion and increased UV-B on terrestrial ecosystems. Int. J. Environ. Stud. 51:217–243.Google Scholar
  19. Björn, L.O., and Murphy T.M. 1985. Computer calculation of solar ultraviolet radiation at ground level. Physiol. Vég. 23:555–561.Google Scholar
  20. Björn, L.O., Callaghan, T.V., Gehrke, C., Gwynn-Jones, D., Holmgren, B., Johanson, U., and Sonesson, M. 1996. Effects of UV-B radiation of subarctic vegetation. In Ecology of Arctic Environments, eds. S.J. Woodin and M. Marquiss, pp. 241–253. Special Publication 13 of the British Ecological Society. Blackwell, London.Google Scholar
  21. Björn, L.O., Callaghan, T.V., Johnsen, I., Lee, J.A., Manetas, Y., Paul, N.D., Sonesson, M., Wellburn, A.R., Coop, D., Heide-Jørgensen, H.S., Gehrke, C., Gwynn-Jones, D., Johanson, U., Kyparissis, A., Levizou, E., Nikolopoulos, D., Petropoulou, Y., and Stephanou, M. 1997. The effects of UV-B radiation on European heathland species. Plant Ecol. 128:252–264.Google Scholar
  22. Björn, L.O., Callaghan, T.V., Gehrke, C., Johanson, U., Sonesson, M., and Gwynn-Jones, D. 1998. The problem of ozone depletion in northern Europe. Ambio 27:275–279.Google Scholar
  23. Blumthaler, M., Ambach, W., and Huber, M. 1993. Altitude effect of solar UV radiation dependent on albedo, turbidity and solar elevation. Meteorol. Z. 2:116–120.Google Scholar
  24. Bornman, J.F. 1989. Target sites of UV-B radiation in photosynthesis of higher plants. J. Photochem. Photobiol. B Biol. B4:145–158.Google Scholar
  25. Bornman, J.F., Reuber, S., Cen, Y.-P., and Weissenböck, G. 1997. Ultraviolet radiation as a stress factor and the role of protective pigments. In Plants and UV-B: Responses to Environmental Change, ed. P. Lumsden, pp.157–168. Cambridge University Press, New York.Google Scholar
  26. Bors, W., Heller, W., Michel, C., and Saran, M. 1990. Flavonoids as antioxidants: determination of radical-scavenging efficiencies. Methods Enzymol. 186:343–355.PubMedGoogle Scholar
  27. Bors, W., Michel, C., and Schikora, S. 1995. Interaction of flavonoids with ascorbate and determination of their univalent redox potentials: a pulse radiolysis study. Free Radic. Biol. Med. 19:45–52.PubMedGoogle Scholar
  28. Brandt, K., Giannini, A., and Lercari, B. 1995. Photomorphogenic responses to UV radiation. III: A comparative study of UVB effects on anthocyanin and flavonoid accumulation in wild-type and aurea mutant of tomato (Lycopersicon esculentum Mill.). Photochem. Photobiol. 62:1081–1087.Google Scholar
  29. Britt, A.B. 1995. Repair of DNA damage induced by ultraviolet radiation. Plant Physiol. 108:891–896.PubMedGoogle Scholar
  30. Britt, A.B. 1996. DNA damage and repair in plants. Annu. Rev. Plant Physiol. Plant Mol. Biol. 47:75–100.PubMedGoogle Scholar
  31. Britt, A.B., Chen J.J., Wykoff, D., and Mitchell, D. 1993. A UV-sensitive mutant of Arabidopsis defective in the repair of pyrimidine-pyrimidinone(6–4) dimers. Science 261:1571–1574.PubMedGoogle Scholar
  32. Brown, M.J., Parker, G.G., and Posner, N.E. 1994. A survey of ultraviolet-B radiation in forests. J. Ecol. 82:843–854.Google Scholar
  33. Cabrera, S., Bozzo, S., and Fuenzalida, H. 1995. Variations in UV radiation in Chile. J. Photochem. Photobiol. B Biol. 28:137–142.Google Scholar
  34. Caldwell, M.M. 1971. Solar ultraviolet irradiation and the growth and development of higher plants. In Photophysiology. Vol. 6. ed. A.C. Giese, pp. 131–177. Academic Press, New York.Google Scholar
  35. Caldwell, M.M. 1979. Plant life and ultraviolet radiation: some perspective in the history of the Earth’s UV climate. BioScience 29:520–525.Google Scholar
  36. Caldwell, M.M., and Flint, S.D. 1994. Stratospheric ozone reduction, solar UV-B radiation and terrestrial ecosystems. Clim. Change 28:375–394.Google Scholar
  37. Caldwell, M.M., and Flint, S.D. 1997. Uses of biological spectral weighting functions and the need of scaling for the ozone reduction problem. Plant Ecol. 128:66–76.Google Scholar
  38. Caldwell, M.M., Robberecht, R., and Billings, W.D. 1980. A steep latitudinal gradient of solar ultraviolet-B radiation in the arctic-alpine life zone. Ecology 61:600–611.Google Scholar
  39. Caldwell, M.M., Robberecht, R., and Nowak, R.S. 1982. Differential photosynthetic inhibition by ultraviolet radiation in species from the arctic-alpine life zone. Arct. Alp. Res. 14:195–202.Google Scholar
  40. Caldwell, M.M., Flint, S.D., and Searles, P.S. 1994. Spectral balance and UV-B sensitivity of soybean: a field experiment. Plant Cell and Environ. 17:267–276.Google Scholar
  41. Caldwell, M.M., Björn, L.O., Bornman, J.F., Flint, S.D., Kulandaivelu, G., Teramura, A.H., and Tevini, M. 1998. Effects of increased solar ultraviolet radiation on terrestrial ecosystems. J. Photochem. Photobiol. B Biol. 46:40–52.Google Scholar
  42. Cannon, G.C., Hedrick, L.A., and Heinhorst, S. 1995. Repair mechanisms of UV-induced DNA damage in soybean chloroplasts. Plant Mol. Biol. 29:1267–1277.PubMedGoogle Scholar
  43. Castelluccio, C., Paganga, G., Melikian, N., Bolwell, G.P., Pridham, J., Sampson, J., and Rice-Evans, C. 1995. Antioxidant potential of intermediates in phenylpropanoid metabolism in higher plants. FEBS Lett. 368:188–192.PubMedGoogle Scholar
  44. Cen, Y.-P., and Bornman, J.F. 1993. The effect of exposure to enhanced UV-B radiation on the penetration of monochromatic and polychromatic UV-B radiation in leaves of Brassica napus. Physiol. Plant. 87:249–255.Google Scholar
  45. Cen, Y.-P., and Björn, L.O. 1994. Action spectra for enhancement of ultraweak luminescence by UV radiaton (270–340 nm) in leaves of Brassica napus. J. Photochem. Photobiol. B Biol. 22:125–129.Google Scholar
  46. Chalker-Scott, L. 1999. Environmental significance of anthocyanins in plant stress responses. Photochem. Photobiol. 70:1–9.Google Scholar
  47. Chappell, J., and Hahlbrock, K. 1984. Transcription of plant defense genes in response to UV-light or fungal elicitor. Nature (Lond.) 311:76–78.Google Scholar
  48. Chen, J., Mitchell, D.L., and Britt, A.B. 1994. A light-dependent pathway for the elimination of UV-induced pyrimidine (6–4) pyrimidone photoproducts in Arabidopsis. Plant Cell 6:1311–1317.Google Scholar
  49. Cockell, C.S. 1999. Crises and extinction in the fossil record-a role for ultraviolet radiation? Paleobiology 25:212–225.Google Scholar
  50. Conklin, P.L., Williams, E.H., and Last, R.L. 1996. Environmental stress sensitivity of an ascorbic acid-deficient Arabidopsis mutant. Proc. Natl. Acad. Sci. U.S.A. 93:9970–9974.PubMedGoogle Scholar
  51. Cybulski, W.J., Peterjohn, W.T., and Sullivan, J.H. 2000. The influence of elevated ultraviolet-B radiation (UV-B) on tissue quality and decomposition of loblolly pine (Pinus taeda L.) needles. Environmental and Experimental Botany 46:231–241.Google Scholar
  52. Dai, Q., Yan, B., Huang, S., Liu, X., Peng, S., Miranda, M.L.L., Chavez, A.Q., Vergara, B.S., and Olszyk, D.M. 1997. Response of oxidative stress defense systems in rice (Oryza sativa) leaves with supplemental UV-B radiation. Physiol. Plant. 101:301–308.Google Scholar
  53. Day, T.A. 1993. Relating UV-B radiation screening effectiveness of foliage to absorbingcompound concentration and anatomical characteristics in a diverse group of plants. Oecologia (Berl.) 95:542–550.Google Scholar
  54. Day, T.A., and Vogelmann, T.C. 1995. Alteration in photosynthesis and pigment distribution in pea leaves following UV-B exposure. Physiol. Plant. 94:433–440.Google Scholar
  55. Day, T.A., Vogelmann, T.C., and DeLucia, E.H. 1992. Are some plant life forms more effective at screening UV-B radiation? Oecologia (Berl.) 92:513–519.Google Scholar
  56. Day, T.A., Martin, G., and Vogelmann, T.C. 1993. Penetration of UV-B radiation in foliage: evidence that the epidermis behaves as a non-uniform filter. Plant Cell Environ. 16:735–741.Google Scholar
  57. Day, T.A., Howells, B.W., and Rice, W.J. 1994. Ultraviolet absorption and epidermaltransmittance spectra in foliage. Physiol. Plant. 92:207–218.Google Scholar
  58. Day, T.A., Howells, B.W., and Ruhland, C.T. 1996. Changes in growth and pigment concentrations with leaf age in pea under modulated UV-B radiation field treatments. Plant Cell Environ. 19:101–108.Google Scholar
  59. Day, T.A., Ruhland, C.T., Grobe, C.W., and Xiong, F. 1999. Growth and reproduction of Antarctic vascular plants in response to warming and UV radiation reductions in the field. Oecologia (Berl.) 119:24–35.Google Scholar
  60. Deckmyn, G., and Impens, I. 1995. UV-B increases the harvest index of bean (Phaseolus vulgaris L.). Plant Cell Environ. 18:1426–1433.Google Scholar
  61. Deckmyn, G., and Impens, I. 1997. Combined effects of enhanced UV-B radiation and nitrogen deficiency on the growth, composition and photosynthesis of rye (Secale cereale). Plant Ecol. 128:235–240.Google Scholar
  62. Deckmyn, G., and Impens, I. 1998. Effects of solar UV-B irradiation on vegetative and generative growth of Bromus catharticus. Environ. Exp. Bot. 40:179–185.Google Scholar
  63. Deckmyn, G., Martens, C., and Impens, I. 1994. The importance of the ratio UV-B/ photosynthetic active radiation (PAR) during leaf development as determining factor of plant sensitivity to increased UV-B irradiance: effects on growth, gas exchange and pigmentation of bean plants (Phaseolus vulgaris cv. Label). Plant Cell Environ. 17:295–301.Google Scholar
  64. DeLucia, E.H., Day, T.A., and Vogelmann, T.C. 1991. Ultraviolet-B radiation and the Rocky Mountain environment: measurement of incident light and penetration into foliage. Curr. Top. Plant Biochem. Physiol. 10:32–48.Google Scholar
  65. Fischbach, R.J., Kossmann, B., Panten, H., Steinbrecher, R., Heller, W., Seidlitz, H.K., Sandermann, H., Hertkorn, N., and Schnitzler, J.P. 1999. Seasonal accumulation of ultraviolet-B screening pigments in needles of Norway spruce (Picea abies (L.) Karst.). Plant Cell Environ. 22:27–37.Google Scholar
  66. Fiscus, E.L., and Booker, F.L. 1995. Is UV-B a hazard to crop photosynthesis and productivity? Results of an ozone-UV-B interaction study and model predictions. Photosyn. Res. 43:81–92.Google Scholar
  67. Fiscus, E.L., Philbeck, R., Britt, A.B., and Booker, F.L. 1999. Growth of Arabidopsis flavonoid mutants under solar radiation and UV filters. Environ. Exp. Bot. 41:231–245.Google Scholar
  68. Flint, S.D., and Caldwell, M.M. 1998. Solar UV-B and visible radiation in tropical forest gaps: measurements partitioning direct and diffuse radiation. Global Change Biol. 4: 863–870.Google Scholar
  69. Fraser, P.J., and Prather, M.J. 1999. Uncertain road to ozone recovery. Nature (Lond.) 398:663–664.Google Scholar
  70. Frederick, J.E., Koob, A.E., Alberts, A.D., and Weatherhead, E.C. 1993. Empirical studies of tropospheric transmission in the ultraviolet: broadband measurements. J. Appl. Meteorol. 32:1883–1892.Google Scholar
  71. Frohnmeyer, H., Bowler, C., and Schäfer, E. 1997. Evidence for some signal transduction elements involved in UV-light-dependent responses in parsley protoplasts. J. Exp. Bot. 48:739–750.Google Scholar
  72. Fry, S.C. 1986. Cross-linking of matrix polymers in the growing cell walls of angiosperms. Ann. Rev. Plant Physiol. 37:165–186.Google Scholar
  73. Gehrke, C., Johanson, U., Callaghan, T.V., Chadwick, D., and Robinson, C.H. 1995. The impact of enhanced ultraviolet-B radiation on litter quality and decomposition processes in Vaccinium leaves from the Subarctic. Oikos 72:213–222.Google Scholar
  74. González, R., Paul, N.D., Percy, K., Ambrose, M., Mclaughlin, C.K., Barnes, J.D., Areses, M., and Wellburn, A.R. 1996. Responses to ultraviolet-B radiation (280–315 nm) of pea (Pisum sativum) lines differing in leaf surface wax. Physiol. Plant. 98:852–860.Google Scholar
  75. González, R., Mepsted, R., Wellburn, A.R., and Paul, N.D. 1998. Non-photosynthetic mechanisms of growth reduction in pea (Pisum sativum) exposed to UV-B radiation. Plant Cell Environ. 21:23–32.Google Scholar
  76. Graham, L.E. 1993. Origin of Land Plants. Wiley, New York.Google Scholar
  77. Grant, R.H. 1997. Biologically active radiation in the vicinity of a single tree. Photochem. Photobiol. 65: 974–982.Google Scholar
  78. Grant, R.H., and Heisler, G.M. 1996. Solar ultraviolet-B and photosynthetically active irradiance in the urban sub-canopy: a survey of influences. Int. J. Biometeorol. 39:201–212.Google Scholar
  79. Grant-Petersson, J., and Renwick, J.A.A. 1996. Effects of ultraviolet-B exposure of Arabidopsis thaliana on herbivory by two crucifer-feeding insects (Lepidoptera). Environ. Entomol. 25:135–142.Google Scholar
  80. Gwynn-Jones, D., Lee, J.A., and Callaghan, T.V. 1997. Effects of enhanced UV-B radiation and elevated carbon dioxide concentrations on a sub-arctic forest heath ecosystem. Plant Ecol. 128:242–249.Google Scholar
  81. Gyorgypal, Z., Kiss, G.B., and Kondorosi, A. 1991. Transduction of plant signal molecules by the Rhizobium Nod D proteins. Bio Essays 13:575–581.Google Scholar
  82. Hada, M., Buchholz, G., Hashimoto, T., Nikaido, O., and Wellmann, E. 1999. Photoregulation of DNA photolyases in broom Sorghum seedlings. Photochem. Photobiol. 69: 681–685.Google Scholar
  83. Harbome, J.B. 1989. Methods in Plant Biochemistry, Vol. 1. Plant Phenolics. Academic Press, San Diego.Google Scholar
  84. Harlow, G.R., Jenkins, M.E., Pittalwala, T.S., and Mount, D.W. 1994. Isolation of uvhl, and Arabidopsis mutant hypersensitive to ultraviolet light and ionizing radiation. Plant Cell 6:227–235.PubMedGoogle Scholar
  85. Harris, P.J., and Hartley, R.D. 1976. Detection of bound ferulic acid in cell walls of the Gramineae by the ultraviolet fluorescence microscopy. Nature (Lond.) 259:508–510.Google Scholar
  86. Harris, P.J., and Hartley, R.D. 1980. Phenolic constituents of the cell walls of monocotyledons. Biochem. Syst. Ecol. 8:153–160.Google Scholar
  87. Harris, P.J., Kelderman, M.R., Kendon, M.F., and McKenzie, R.J. 1997. Monosaccharide compositions of unlignified cell walls of monocotyledons in relation to the occurrence of wall-bound ferulic acid. Biochem. Syst. Ecol. 25:167–179.Google Scholar
  88. Hartley, R.D., and Harris, P.J. 1981. Phenolic constituents of the cell walls of dicotyledons. Biochem. Syst. Ecol. 9:189–203.Google Scholar
  89. Hatcher, P.E., and Paul, N.D. 1994. The effect of elevated UV-B radiation on herbivory of pea by Autographa gamma. Entomol. Exp. Appl. 71:227–233.Google Scholar
  90. He, J., Huang, L.K., Chow, W.S., Whitecross, M.I., and Anderson, J.M. 1993. Effects of supplementary ultraviolet-B radiation on rice and pea plants. Aust. J. Plant Physiol. 20:129–142.Google Scholar
  91. He, J., Huang, L.K., Chow, W.S., Whitecross, M.I., and Anderson, J.M. 1994. Responses of rice and pea plants to hardening with low doses of ultraviolet-B radiation. Aust. J. Plant Physiol. 21:563–574.Google Scholar
  92. Hideg, É., and Vass, I. 1996. UV-B induced free radical production in plant leaves and isolated thylakoid membranes. Plant Sci. 115:251–260.Google Scholar
  93. Hideg, É., Mano, J., Ohno, C., and Asada, K. 1997. Increased levels of monodehydroascorbate radical in UV-B irradiated broad bean leaves. Plant Cell Physiol. 38: 684–690.Google Scholar
  94. Hidema, J., Kumagai, T., Sutherland, J.C., and Sutherland, B.M. 1997. Ultraviolet Bsensitive rice cultivar deficient in cyclobutyl pyrimidine dimer repair. Plant Physiol. 1:39–44.Google Scholar
  95. Hoque, E., and Remus, G. 1999. Natural UV-screening mechanisms of Norway spruce (Picea abies [L.] Karst.) needles. Photochem. Photobiol. 69:177–192.Google Scholar
  96. Huang, L.K., He, J., Chow, W.S., Whitecross, M.I., and Anderson, J.M. 1993. Responses of detached rice leaves (Oryza sativa L.) to moderate supplementary ultraviolet-B radiation allow early screening for relative sensitivity to ultraviolet-B radiation. Aust. J. Plant Physiol. 20:285–297.Google Scholar
  97. Hunt, J.E., and McNeil, D.L. 1998. Nitrogen status affects UV-B sensitivity of cucumber. Aust. J. Plant Physiol. 25:79–86.Google Scholar
  98. Husain, S.R., Cillard, J., and Cillard, P. 1987. Hydroxyl radical scavenging activity of flavonoids. Phytochemistry 26:2489–2491.Google Scholar
  99. Ibrahim, R., and Barron, D. 1989. Phenypropanoids. In Methods in Plant Biochemistry, Vol. 1. Plant Phenolics, ed. J.B. Harborne, pp.75–111. Academic Press, San Diego.Google Scholar
  100. Jansen, M.A.K., Gaba, V., Greenberg, B.M., Mattoo, A.K., and Edelman, M. 1996. Low threshold levels of ultraviolet-B in a background of photosynthetically active radiation trigger rapid degradation of the D2 protein of photosystem II. Plant J. 9:693–696.Google Scholar
  101. Johanson, U., Gehrke, C., Björn, L.O., and Callaghan, T.V. 1995a. The effects of enhanced UV-B radiation on the growth of dwarf shrubs in a subarctic heathland. Funct. Ecol. 9:713–719.Google Scholar
  102. Johanson, U., Gehrke, C., Björn, L.O., and Callaghan, T.V. 1995b. The effects of enhanced UV-B radiation on a subarctic heath ecosystem. Ambio 24:106–111.Google Scholar
  103. Jones, A.E., and Shanklin, J.D. 1995. Continued decline of total ozone over Halley, Antarctica, since 1985. Nature (Lond.) 376:409–411.Google Scholar
  104. Jordan, B.R. 1996. The effects of ultraviolet-B radiation on plants: a molecular perspective. Adv. Bot. Res. 22:97–162.Google Scholar
  105. Kamisaka, S., Takeda, S., Takahashi, K., and Shibata, K. 1990. Diferulic and ferulic acid in the cell wall of Avena coleoptiles: Their relationships to mechanical properties of the cell wall. Physiol. Plant. 78:1–7.Google Scholar
  106. Kang, H., Hidema, J., and Kumagai, T. 1998. Effects of light environment during culture on UV-induced cyclobutyl pyrimidine dimers and their photorepair in rice (Oryza sativa L.). Photochem. Photobiol. 68:71–77.Google Scholar
  107. Kim, H.Y., Kobayashi, K., Nouchi, I., and Yoneyama, T. 1996a. Enhanced UV-B radiation has little effect on growth, 13C values and pigments of pot-grown rice (Oryza sativa) in the field. Physiol. Plant. 96:1–5.Google Scholar
  108. Kim, H.Y., Kobayashi, K., Nouchi, I., and Yoneyama, T. 1996b. Differential influences of UV-B radiation on antioxidants and related enzymes between rice (Oryza sativa L.) and cucumber (Cucumis sativus L.) leaves. Environ. Sci. 9:55–63.Google Scholar
  109. Kim, H.Y., Kobayashi, K., Nouchi, I., and Yoneyama, T. 1996c. Changes in antioxidant levels and activities of related enzymes in rice (Oryza sativa L.) leaves irradiated with enhanced UV-B radiation under field conditions. Environ. Sci. 9:55–63.Google Scholar
  110. Klein, K., and Blum, U. 1990. Inhibition of cucumber leaf expansion by ferulic acid in split-root experiments. J. Chem. Ecol. 16:455–463.Google Scholar
  111. Kramer, G.F., Norman, H.A., Krizek, D.T., and Mirecki, R.M. 1991. Influence of UV-B radiation on polyamines, lipid peroxidation and membrane lipids in cucumber. Phytochemistry 7:2101–2108.Google Scholar
  112. Krizek, D.T., Mirecki, R.M., and Britz, S.J. 1997. Inhibitory effects of ambient levels of solar UV-A and UV-B radiation on growth of cucumber. Physiol. Plant. 100:886–893.Google Scholar
  113. Krizek, D.T., Britz, S.J., and Mirecki, R.M. 1998. Inhibitory effects of ambient levels of solar UV-A and UV-B radiation on growth of cv. New Red Fire lettuce. Physiol. Plant. 103:1–7.Google Scholar
  114. Kuchinke, C., and Nunez, M. 1999. Cloud transmission estimates of UV-B erythemal irradiance. Theor. Appl. Clim. 63:149–161.Google Scholar
  115. Lam, T.B.T., Iiyama, K., and Stone, B.A. 1994. An approach to the estimation of ferulic acid bridges in unfractionated cell walls of wheat internodes. Phytochemistry 37:327–333.Google Scholar
  116. Landry, L.G., Chapple, C.C.S., and Last, R.L. 1995. Arabidopsis mutants lacking phenolic sunscreens exhibit enhanced ultraviolet-B injury and oxidative damage. Plant Physiol. 109:1159–1166.PubMedGoogle Scholar
  117. Lavola, A. 1997. Accumulation of flavonoids and related compounds in birch induced by UV-B irradiance. Tree Physiol. 18:53–58.Google Scholar
  118. Levall, M.W., and Bornman, J.F. 1993. Selection in vitro for UV-tolerant sugar beet (Beta vulgaris) somaclones. Physiol. Plant. 88:37–43.Google Scholar
  119. Li, H., Inoue, M., Nishimura, H., Mizutani, J., and Tsuzuki, E. 1993. Interactions of transcinnamic acid, its related phenolic allelochemicals, and abscisic acid in seedling growth and seed germination of lettuce. J. Chem. Ecol. 19:1775–1787.Google Scholar
  120. Lichtenthaler, H.K., and Schwieger, J. 1998. Cell wall bound ferulic acid, the major substance of the blue-green fluorescence emission of plants. J.Plant Physiol. 152:272–282.Google Scholar
  121. Liu, L., and McClure, J.W. 1995. Effects of UV-B on activities of enzymes of secondary phenolic metabolism in barley primary leaves. Physiol. Plant. 93:734–739.Google Scholar
  122. Liu, L., Gitz, D.C., and McClure, J.W. 1995. Effects of UV-B on flavonoids, ferulic acid, growth and photosynthesis in barley primary leaves. Physiol. Plant. 93:725–733.Google Scholar
  123. Lois, R., and Buchanan, B.B. 1994. Severe sensitivity to ultraviolet radiation in an Arabidopsis mutant deficient in flavonoid accumulation. Planta 194:504–509.Google Scholar
  124. Logemann, E., Wu, S.C., Schröder, J., Schmelzer, E., Somssich, I.E., and Hahlbrock, K. 1995. Gene activation by UV light, fungal elicitor or fungal infection in Petroselinum crispum is correlated with repression of cell cycle-related genes. Plant J. 8:865–876.PubMedGoogle Scholar
  125. Lowry, B., Lee, D., and Hébant. 1980. The origin of land plants: a new look at an old problem. Taxon 29:183–197.Google Scholar
  126. Lumsden, P. 1997. Plants and UV-B: Responses to Environmental Change. Cambridge University Press, New York.Google Scholar
  127. Mabry, T.J., Markham, K.R., and Thomas, M.B. 1970. The Systematic Identification of Flavonoids. Springer Verlag, New York.Google Scholar
  128. Mackerness, S.A.H., Butt, P.J., Jordan, B.R., and Thomas, B. 1996. Amelioration of ultraviolet-B induced down-regulation of messenger-RNA levels for chloroplast proteins by high irradiance is mediated by photosynthesis. J. Plant Physiol. 148:100–106.Google Scholar
  129. Mackerness, S.A.H., Surplus, S.L., Jordan, B.R., and Thomas, B. 1997. UV-B effects on transcript levels for photosynthetic genes are not mediated through carbohydrate metabolism. Plant Cell Environ. 20:1431–1437.Google Scholar
  130. Mackerness, S.A.H., Surplus, S.L., Jordan, B.R., and Thomas, B. 1998. Effects of supplementary ultraviolet-B radiation on photosynthetic transcripts at different stages of leaf development and light levels in pea (Pisum sativum L.): role of active oxygen species and antioxidant enzymes. Photochem. Photobiol. 68:88–96.Google Scholar
  131. Madronich, S., McKenzie, R.L., Björn, L.O., and Caldwell, M.M. 1998. Changes in biologically active ultraviolet radiation reaching at the Earth’s surface. J. Photochem. Photobiol. B Biol. 46:5–19.Google Scholar
  132. Malanga, G., and Puntarulo, S. 1995. Oxidative stress and antioxidant content in Chlorella vulgaris after exposure to ultraviolet-B radiation. Physiol. Plant. 94:672–679.Google Scholar
  133. Mark, U., Saile-Mark, M., and Tevini, M. 1996. Effects of solar UVB radiation on growth, flowering and yield of central and southern European maize cultivars (Zea mays L.). Photochem. Photobiol. 64:457–463.Google Scholar
  134. Markham, K.R. 1982. Techniques of Flavonoid Identification. Academic Press, San Diego.Google Scholar
  135. Markham, K.R., Ryan, K.G., Bloor, S.J., and Mitchell, K.A. 1998a. An increase in the luteolin: apigenin ratio in Marchantia polymorpha on UV-B enhancement. Phytochemistry 48:791–794.Google Scholar
  136. Markham, K.R., Tanner, G.J., Caasi-Lit, M., Whitecross, M.I., Nayudu, M., and Mitchell, K.A. 1998b. Possible protective role for 3’,4’-dihydroxyflavones induced by enhanced UV-B in a UV-tolerant rice cultivar. Phytochemistry 49:1913–1919.Google Scholar
  137. Mazza, C.A., Battista, D., Zima, A.M., Szwarcberg-Bracchitta, M., Giordano, C.V., Acevedo, A., Scopel, A.L., and Ballaré, C.L. 1999a. The effects of solar ultraviolet-B radiation on the growth and yield of barley are accompanied by increased DNA damage and antioxidant responses. Plant Cell Environ. 22:61–70.Google Scholar
  138. Mazza, C.A., Zavala, J., Scopel, A.L., and Ballaré, C.L. 1999b. Perception of solar UVB radiation by phytophagous insects: behavioral responses and ecosystem implications. Proc. Natl. Acad. Sci. U.S.A. 96:980–985.PubMedGoogle Scholar
  139. McCloud, E.S., and Berenbaum, M.R. 1994. Stratospheric ozone depletion and plantinsect interactions: effects of UVB radiation on foliage quality of Citrus jambhiri for Trichoplusia ni. J. Chem. Ecol. 20:525–539.Google Scholar
  140. McLeod, A.R. 1997. Outdoor supplementation systems for studies of the effects of increased UV-B radiation. Plant Ecol. 128:78–92.Google Scholar
  141. McPeters, R.D., and Labow, G.J. 1996. An assessment of the accuracy of 14.5 years of Nimbus 7 TOMS version 7 ozone data by comparison with the Dobson network. Geophys. Res. Lett. 23:3695–3698.Google Scholar
  142. Melis, A., Nemson, J.A., and Harrison, M.A. 1992. Damage to functional components and partical degradation of photosystem II reaction centre proteins upon chloroplast exposure to ultraviolet-B radiation. Biochim. Biophys. Acta 1109:312–320.Google Scholar
  143. Mepsted, R., Paul, N.D., Stephen, J., Corlett, J.E., Nougués, S., Baker, N.R., Jones, H.G., and Ayres, P.G. 1996. Effects of enhanced UV-B radiation on pea (Pisum sativum L.) grown under field conditions in the UK. Global Change Biol. 2:325–334.Google Scholar
  144. Middleton, E.M., and Teramura, A.H. 1993. Potential errors in the use of cellulose diacetate and mylar filters in UV-B radiation studies. Photochem. Photobiol. 57:744–751.Google Scholar
  145. Mirecki, R.M., and Teramura, A.H. 1984. Effects of ultraviolet-B irradiance on soybean. V. The dependence of plant sensitivity on the photosynthetic photon flux density during and after leaf expansion. Plant Physiol. 74:475–480.PubMedGoogle Scholar
  146. Montesinos, M.C., Ubeda, A., Terencio, M.C., Paya, M., and Alcaraz, M.J. 1995. Antioxidant profile of mono- and dihydroxylated flavone derivatives in free radical generating systems. Z. Naturforsch. C Biosci. 50c:552–560.Google Scholar
  147. Montzka, S.A., Butler, J.H., Elkins, J.W., Thompson, T.M., Clarke, A.D., and Lock, L.T. 1999. Present and future trends in the atmospheric burden of ozone-depleting halogens. Nature (Lond.) 398:690–694.Google Scholar
  148. Moody, S.A., Coop, D.J.S., and Paul, N.D. 1997. Effects of elevated UV-B radiation and elevated CO2 on heathland communities. In Plants and UV-B: Responses to Environmental Change, ed. P. Lumsden, pp. 283–304. Cambridge University Press, New York.Google Scholar
  149. Musil, C.F. 1995. Differential effects of elevated ultraviolet-B radiation on the photochemical and reproductive performances of dicotyledonous and monocotyledonous aridenvironment ephemerals. Plant Cell Environ. 18:844–854.Google Scholar
  150. Musil, C.F., Rutherford, M.C., Powrie, L.W., Björn, L.O., and McDonald, D.J. 1999. Spatial and temporal changes in South African solar ultraviolet-B exposure: implications for threatened taxa. Ambio 28:450–456.Google Scholar
  151. Newsham, K.K., McLeod, A.R., Greenslade, P.D., and Emmett, B.A. 1996. Appropriate controls in outdoor UV-B supplementation experiments. Global Change Biol. 2:319–324.Google Scholar
  152. Newsham, K.K., McLeod, A.R., Roberts, J.D., Greenslade, P.D., and Emmett, B.A. 1997. Direct effects of elevated UV-B radiation on the decomposition of Quercus robur leaf litter. Oikos 79:592–602.Google Scholar
  153. Newsham, K.K., Greenslade, P.D., Kennedy, V.H., and McLeod, A.R. 1999. Elevated UV-B radiation incident on Quercus robur leaf canopies enhances decomposition of resulting leaf litter in soil. Global Change Biol. 5:403–409.Google Scholar
  154. Nogués, S., and Baker, N.R. 1995. Evaluation of the role of damage to photosystem II in the inhibition of CO2 assimilation in pea leaves on exposure to UV-B. Plant Cell Environ. 18:781–787.Google Scholar
  155. Nogués, S., Allen, D.J., Morison, J.I., and Baker, N.R. 1998. Ultraviolet-B radiation effects on water relations, leaf development, and photosynthesis in droughted pea plants. Plant Physiol. 117:173–181.PubMedGoogle Scholar
  156. Ormrod, D.P., Landry, L.G., and Conklin, P.L. 1995. Short-term UV-B radiation and ozone exposure effects on aromatic secondary metabolite accumulation and shoot growth of flavonoid-deficient Arabidopsis mutants. Physiol. Plant. 93:602–610.Google Scholar
  157. Pang, Q., and Hays, J.B. 1991. UV-B-inducible and temperature-sensitive photoreactivation of cyclobutane pyrimidine dimers in Arabidopsis thaliana. Plant Physiology 95:536–543.Google Scholar
  158. Quaite, F.E., Takayanagi, S., Ruffini, J., Sutherland, J.C., and Sutherland, B.M. 1994. DNA damage levels determine cyclobutyl pyrimidine dimer repair mechanisms in alfalfa seedlings. Plant Cell 6:1635–1641.PubMedGoogle Scholar
  159. Rao, M.V., and Ormrod, D.P. 1995. Impact of UVB and 03 on the oxygen free radical scavenging system in Arabidopsis thaliana genotypes differing in flavonoid biosynthesis. Photochem. Photobiol. 62:719–726.Google Scholar
  160. Rao, M.V., Paliyath, G., and Ormrod, D.P. 1996. Ultraviolet-B- and ozone-induced biochemical changes in antioxidant enzymes of Arabidopsis thaliana. Plant Physiol. 110:125–136.Google Scholar
  161. Reuber, S., Bornman, J.F., and Weissenböck, G. 1996. A flavonoid mutant of barley (Hordeum vulgare L.) exhibits increased sensitivity to UV-B radiation in the primary leaf. Plant Cell Environ. 19:593–601.Google Scholar
  162. Rhlid, R.B., Chabot, S., Piché, Y., and Chênevert, R. 1993. Isolation and identification of flavonoids from Ri T-DNA-transformed roots (Daucus carota) and their significance in vesicular-arbuscular mycorrhiza. Phytochemistry 33:1369–1371.Google Scholar
  163. Rice-Evans, C. 1995. Plant polyphenols: free radical scavengers or chain-breaking antioxidants? In Free Radicals and Oxidative Stress: Environment, Drugs and Food Additives, Vol. 61, eds. C. Rice-Evans, B. Halliwell, and G.G. Lunt, pp.103–116. Portland Press, London.Google Scholar
  164. Rousseaux, M.C., Ballaré, C.L., Scopel, A.L., Searles, P.S., and Caldwell, M.M. 1998. Solar ultraviolet-B radiation affects plant-insect interactions in a natural ecosystem of Tierra del Fuego (southern Argentina). Oecologia (Berl.) 116:528–535.Google Scholar
  165. Rozema, J., van de Staaij, J., Björn, L.O., and Caldwell, M. 1997a. UV-B as an environmental factor in plant life: stress and regulation. Trends Ecol. Evol. 12:22–28.PubMedGoogle Scholar
  166. Rozema, J., Gieskes, W.W.C., van de Geijn, S.C., Nolan, C., and de Boois, H. 1997b. UV-B and Biosphere. Kluwer, Boston.Google Scholar
  167. Rozema, J., Tosserams, M., Nelissen, H.J.M., van Heerwaarden, L., Broekman, R.A., and Flierman, N. 1997c. Stratospheric ozone reduction and ecosystem processes: enhanced UV-B radiation affects chemical quality and decomposition of leaves of the dune grassland species Calamagrostis epigeios. Plant Ecol. 128:284–294.Google Scholar
  168. Ryan, K.G., Markham, K.R., Bloor, S.J., Bradley, J.M., Mitchell, K.A., and Jordan, B.R. 1998. UVB radiation induced increase in quercetin:kaempferol ratio in wild-type and transgenic lines of Petunia. Photochem. Photobiol. 68:323–330.Google Scholar
  169. Salt, D.T., Moody, S.A., Whittaker, J.B., and Paul, N.D. 1998. Effects of enhanced UVB on populations of the phloem feeding insect Strophingia ericae (Homoptera: Psylloidea) on heather (Calluna vulgaris). Global Change Biol. 4:91–96.Google Scholar
  170. Schnitzler, J.P., Jungblut, T.P., Heller, W., Köfferlein, M., Hutzler, P., Heinzmann, U., Schmelzer, E., Ernst, D., Langebartels, C., and Sandermann, H. 1996. Tissue localization of u.v.-B-screening pigments and of chalcone synthase mRNA in needles of Scots pine seedlings. New Phytol. 132:247–258.Google Scholar
  171. Schumaker, M.A., Bassman, J.H., Robberecht, R., and Radamaker, G.K. 1997. Growth, leaf anatomy, and physiology of Populus clones in response to solar ultraviolet-B radiation. Tree Physiol. 17:617–626.PubMedGoogle Scholar
  172. Searles, P.S., Caldwell, M.M., and Winter, K. 1995. The response of five tropical dicotyledon species to solar ultraviolet-B radiation. Am. J. Bot. 82:445–453.Google Scholar
  173. Searles, P.S., Flint, S.D., Diaz, S.B., Rousseaux, M.C., Ballaré, C.L., and Caldwell, M.M. 1999. Solar ultraviolet-B radiation influence on Sphagnum bog and Carex fen ecosystems: first field season findings in Tierra del Fuego, Argentina. Global Change Biol. 5:225–234.Google Scholar
  174. Shaath, N.A. 1990. Evolution of modern sunscreen chemicals. In Sunscreens: Development, Evaluation, and Regulatory Aspects, eds. N.J. Lowe and N.A. Shaath, pp. 3–35. Dekker, New York.Google Scholar
  175. Sheahan, J.J. 1996. Sinapate esters provide greater UV-B attenuation than flavonoids in Arabidopsis thaliana (Brassicaceae). Am. J. Bot. 83:679–686.Google Scholar
  176. Shindell, D.T., Rind, D., and Lonergan, P. 1998. Increased polar stratospheric ozone losses and delayed eventual recovery owing to increasing greenhouse-gas concentrations. Nature (Lond.) 392:589–592.Google Scholar
  177. Solomon, S., and Daniel, J.S. 1996. Impact of the Montreal Protocol and its amendments on the rate of change of global radiative forcing. Clim. Change 32:7–17.Google Scholar
  178. Solomon, S. 1999. Stratospheric ozone depletion: a review of concepts and history. Rev. Geophys. 37:275–316.Google Scholar
  179. Spetea, C., Hideg, È., and Vass, I. 1996. The quinone electron acceptors are not the main sensitizers of UV-B induced protein damage in isolated photosystem II reaction centre and core complexes. Plant Sci. 115:207–215.Google Scholar
  180. Staehelin, J., Kegel, R., and Harris, N.R.P. 1998. Trend analysis of the homogenized total ozone series of Aroso (Switzerland). J. Geophys. Res. 103:8389–8399.Google Scholar
  181. Stafford, H.A. 1990. Flavonoid Metabolism. CRC Press, Boca Raton, FL.Google Scholar
  182. Stapleton, A.E., Thornber, C.S., and Walbot, V. 1997. UV-B component of sunlight causes measurable damage in field-grown maize (Zea mays L.): developmental and cellular heterogeneity of damage and repair. Plant Cell Environ. 20:279–290.Google Scholar
  183. Staxén, L., Bergounious, X., and Bornman, J. F. 1993. Effect of ultraviolet radiation on cell division and microtubule organization in Petunia hybrida protoplasts. Protoplasma 173:70–76.Google Scholar
  184. Stephen, J., Woodfin, R., Cortlett, J.E., Paul, N.D., Jones, H.G., and Ayres, P.G. 1999. Response of barley and pea crops to supplementary UV-B radiation. J. Agric. Sci. 132: 253–261.Google Scholar
  185. Stolarski, R.S., Bloomfield, P., McPeters, R.D., and Herman, J.R. 1991. Total ozone trends deduced from Nimbus 7 TOMS data. Geophys. Res. Lett. 18:1015–1018.Google Scholar
  186. Strack, D., Heilmann, J., Mömken, M., and Wray, V. 1988. Cell wall-conjugated phenolics from Coniferae leaves. Phytochemistry 27:3517–3521.Google Scholar
  187. Strack, D., Heilemann, J., Wray, V., and Dirks, H. 1989. Structures and accumulation patterns of soluble and insoluble phenolics from Norway spruce needles. Phytochemistry 28:2071–2078.Google Scholar
  188. Strid, Å., Chow, W.S., and Anderson, J.M. 1990. Effects of supplementary ultraviolet-B radiation on photosynthesis in Pisum sativum. Biochim. Biophys. Acta 1020:260–268.Google Scholar
  189. Sullivan, J.H., Teramura, A.H., Adamse, P., Kramer, G.F., Upadhyaya, A., Britz, S.J., Krizek, D.T., and Mirecki, R.M. 1994. Comparison of the, response of soybean to supplemental UV-B radiation supplied by either square-wave or modulated irradiation systems. In Stratospheric Ozone Depletion/UV-B Radiation in the Biosphere, eds. R.H. Biggs and M.E.B. Joyner, pp. 211–220. Springer, Berlin.Google Scholar
  190. Sullivan, J.H., Howells, B.W., Ruhland, C.T., and Day, T.A. 1996. Changes in leaf expansion and epidermal screening effectiveness in Liquidambar styraciflua and Pinus taeda in response to UV-B radiation. Physiol. Plant. 98:349–357.Google Scholar
  191. Sutherland, B.M., Takayanagi, S., Sullivan, J.H., and Sutherland, J.C. 1996. Plant responses to changing environmental stress: cyclobutyl pyrimidine dimer repair in soybean leaves. Photochem. Photobiol. 64:464–468.Google Scholar
  192. Takeuchi, Y., Fukumoto, R., Kasahara, H., Sakaki, T., and Kitao, M. 1995. Peroxidation of lipids and growth inhibition induced by UV-B irradiation. Plant Cell Rep. 14: 566–570.Google Scholar
  193. Takeuchi, Y., Kubo, H., Kasahara, H., and Sakaki, T. 1996. Adaptive alterations in the activities of scavengers of active oxygen in cucumber cotyledons irradiated with UV-B. J. Plant Physiol. 147:589–592.Google Scholar
  194. Taulavuori, E., Bäckman, M., Taulavuori, K., Gwynn-Jones, D., Johanson, U., Laine, K., Callaghan, T., Sonesson, M., and Björn, L.O. 1998. Long-term exposure to enhanced ultraviolet-B radiation in the sub-arctic does not cause oxidative stress in Vaccinium myrtillus. New Phytol. 140:691–697.Google Scholar
  195. Taylor, R.M., Nikaido, O., Jordan, B.R., Rosamond, J., Bray, C.M., and Tobin, A.K. 1996. Ultraviolet-B-induced DNA lesions and their removal in wheat (Triticum aestivum L.) leaves. Plant Cell Environ. 19:171–181.Google Scholar
  196. Teramura, A H., and Sullivan, J.H. 1994. Effects of UV-B radiation on photosynthesis and growth of terrestrial plants. Photosynth. Res. 39:463–473.Google Scholar
  197. Tevini, M. 1993. Effects of enhanced UV-B radiation on terrestrial plants. In UV-B Radiation and Ozone Depletion: Effects on Humans, Animals, Plants, Microorganisms, and Materials, ed. M. Tevini, pp. 125–153. Lewis, Boca Raton, FL.Google Scholar
  198. Tevini, M., and Iwanzik, W. 1986. Effects of UV-B radiation on growth and development of cucumber seedlings. In Stratospheric Ozone Reduction, Solar Ultraviolet Radiation and Plant Life, Vol. G8, eds. R.C. Worrest and M.M. Caldwell, pp. 271–285. Springer, Berlin.Google Scholar
  199. Tevini, M., Braun, J., and Fieser, G. 1991. The protective function of the epidermal layer of rye seedlings against ultraviolet-B radiation. Photochem. Photobiol. 53:329–333.Google Scholar
  200. Thiel, S., Steiner, K., and Seidlitz, H.K. 1997. Modification of global erythemally effective irradiance by clouds. Photochem. Photobiol. 65:969–973.PubMedGoogle Scholar
  201. Torell, J., Cillard, J., and Cillard, P. 1986. Antioxidant activity of flavonoids and reactivity with peroxyl radical. Phytochemistry 25:383–385.Google Scholar
  202. Tosserams, M., Pais de Sà, A., and Rozema, J. 1996. The effect of solar UV radiation on four plant species occurring in a coastal grassland vegetation in The Netherlands. Physiol. Plant. 97:731–739.Google Scholar
  203. Vass, I., Sass, L., Spetea, C., Bakou, A., Ghanatokis, D.F., and Petrouleas, V. 1996. UVB induced inhibition of photosystem II electron transport studied by EPR and chlorophyll fluorescence. Impairment of donor and acceptor side components. Biochemistry 35:8964–8973.PubMedGoogle Scholar
  204. Vogelmann, T.C. 1994. Light within the plant. In Photomorphogenesis in Plants, 2nd ed., eds. R.E. Kendrick and G.H.M. Kronenberg, pp. 491–535. Kluwer, Boston.Google Scholar
  205. Wakabayashi, K., Hoson, T., and Kamisaka, S. 1997. Osmotic stress suppresses cell wall stiffening and the increase in cell wall-bound ferulic and diferulic acids in wheat coleoptiles. Plant Physiol. 113:967–973.PubMedGoogle Scholar
  206. Warner, C.W., and Caldwell, M.M. 1983. Influence of photon flux density in the 400–700 nm waveband on inhibition of photosynthesis by UV-B (280–320 nm) irradiation in soybean leaves: separation of indirect and immediate effects. Photochem. Photobiol. 38:341–346.Google Scholar
  207. Waterman, P.G., and Mole, S. 1994. Analysis of Phenolic Plant Metabolites. Blackwell, London.Google Scholar
  208. Willekens, H., Van Camp, W., Van Montagu, M., Inzé, D., Langebartels, C., and Sandermann, H. 1994. Ozone, sulfur dioxide and ultraviolet-B have similar effects on mRNA accumulation of antioxdiant genes in Nicotania plumbaginifolia L. Plant Physiol. 106:1007–1014.PubMedGoogle Scholar
  209. Woodall, G.S., and Stewart, G.R. 1998. Do anthocyanins play a role in UV protection of the red juvenile leaves of Syzygium? J. Exp. Bot. 49:1447–1450.Google Scholar
  210. Yamasaki, H., Uefuji, H., and Sakihama Y. 1996. Bleaching of the red anthocyanin induced by superoxide radical. Arch. Biochem. Biophys. 332:183–186.PubMedGoogle Scholar
  211. Yamasaki, H., Sakihama, Y., and Ikehara, N. 1997. Flavonoid-peroxidase reaction as a detoxification mechanism of plant cells against H2O2. Plant Physiol. 115:1405–1412.PubMedGoogle Scholar
  212. Yue, M., Li, Y., and Wang, X. 1998. Effects of enhanced ultraviolet-B radiation on plant nutrients and decomposition of spring wheat under field conditions. Environ. Exp. Bot. 40:187–196.Google Scholar
  213. Zepp, R.G., Callaghan, T.V., and Erickson, D.J. 1998. Effects of enhanced solar ultraviolet radiation on biogeochemical cycles. J. Photochem. Photobiol. B Biol. 46:69–82.Google Scholar

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