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The Role of Plastids in Gravitropism

  • Maria Palmieri
  • John Z. Kiss
Part of the Advances in Photosynthesis and Respiration book series (AIPH, volume 23)

In contrast to most animals, plants are largely sessile, so these organisms have had to develop survival strategies that differ from those of most animals. Whereas many animals migrate in search of favorable environmental conditions (i.e. water, food supply, climate, low predation), plants can adjust to their environment through directed growth (i.e. tropisms). For instance, plant roots develop in soil to optimize anchorage and absorption of water and nutrients. Shoots develop above the ground, and their morphology is tailored to suit lighting needs and optimize placement in wind currents. Thus, plants direct their growth in response to local environmental conditions.

Keywords

Endodermal Cell Gravitropic Response Gravity Signal Root Gravitropism Columella Cell 
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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References

  1. Baluška F and Hasenstein KH (1997) Root cytoskeleton: its role in perception of and response to gravity. Planta 203: S69-S78PubMedCrossRefGoogle Scholar
  2. Barlow PW (1995) Gravity perception in plants: a multiplicity of systems derived by evolution? Plant Cell Environ 18: 951-962PubMedCrossRefGoogle Scholar
  3. Bj örkman T and Cleland RE (1991) The role of extracellular free-calcium gradients in gravitropic signaling in maize roots. Planta 185: 379-384Google Scholar
  4. Blancaflor EB (2002) The cytoskeleton and gravitropism in higher plants. J Plant Growth Regul 21: 120-136PubMedCrossRefGoogle Scholar
  5. Blancaflor EB and Hasenstein KH (1993) Organization of corti-cal microtubules in graviresponding maize roots. Planta 191: 231-237PubMedGoogle Scholar
  6. Blancaflor EB, Fasano JM and Gilroy S (1998) Mapping the functional roles of cap cells in the response of Arabidopsis primary roots to gravity. Plant Physiol 116: 213-222PubMedCrossRefGoogle Scholar
  7. Boonsirichai K, Sedbrook JC, Chen R, Gilroy S and Masson PH (2003) ARG1 is a peripheral membrane protein that modulates gravity-induced cytoplasmic alkalinization and lateral auxin transport in plant statocytes. Plant Cell 15: 2612-2625PubMedCrossRefGoogle Scholar
  8. Braun M (1996) Immunolocalization of myosin in rhizoids of Chara globularis Thuill. Protoplasma 191: 1-8CrossRefGoogle Scholar
  9. Butler JH, Hu SQ, Brady SR, Dixon MW and Muday GK (1998) In vitro and in vivo evidence for actin association of the naphthylphthalamic acid-binding protein from zucchini hypocotyls. Plant J 13: 291-301PubMedCrossRefGoogle Scholar
  10. Clifford PE, Douglas S and McCartney GW (1989) Amyloplast sedimentation in shoot statocytes having a large central vac-uole further interpretation from electron microscopy. J Exp Bot 40: 1341-1346CrossRefGoogle Scholar
  11. Collings DA, Zsuppan G, Allen NS and Blancaflor EB (2001) Demonstration of prominent actin filaments in the root col-umella. Planta 212: 392-403PubMedCrossRefGoogle Scholar
  12. Correll MJ and Kiss JZ (2002) Interactions between gravitropism and phototropism in plants. J Plant Growth Regul 21: 89-101PubMedCrossRefGoogle Scholar
  13. Correll MJ and Kiss JZ (2005) The roles of phytochromes in elongation and gravitropism of roots. Plant and Cell Physiol 46: 317-323CrossRefGoogle Scholar
  14. Correll MJ, Coveney KM, Raines SV, Mullen JL, Hangarter RP and Kiss JZ (2003) Phytochromes play a role in phototropism and gravitropism in Arabidopsis roots. Adv Space Res 31: 2203-2210PubMedCrossRefGoogle Scholar
  15. Cox DN and Muday GK (1994) NPA binding-activity is periph-eral to the plasma-membrane and is associated with the cy-toskeleton. Plant Cell 6: 1941-1953PubMedCrossRefGoogle Scholar
  16. Darwin C and Darwin F (1881) The Power of Movement in Plants. D Appleton, New York (Reprint, New York: Da Capo Press, 1966)Google Scholar
  17. Digby J and Firn RD (1995) The gravitropic set-point angle GSA: the identification of an important developmentally controlled variable governing plant architecture. Plant Cell Environ 18: 1434-1440PubMedCrossRefGoogle Scholar
  18. Driss-Ecole D, Jeune B, Prouteau M, Julianus P and Perbal G (2000) Lentil root statoliths reach a stable state in microgravity. Planta 211: 396-405PubMedCrossRefGoogle Scholar
  19. Fasano JM, Swanson SJ, Blancaflor EB, Dowd PE, Kao T-h and Gilroy S (2001) Changes in root cap pH are required for the gravity response of the Arabidopsis root. Plant Cell 13: 907-921PubMedCrossRefGoogle Scholar
  20. Fasano JM, Massa GD and Gilroy S (2002) Ionic signaling in plant responses to gravity and touch. J Plant Growth Regul 21: 71-88PubMedCrossRefGoogle Scholar
  21. Fitzelle KJ and Kiss JZ (2001) Restoration of gravitropic sensitiv-ity in starch-deficient mutants of Arabidopsis by hypergravity. J Exp Bot 52: 265-275PubMedCrossRefGoogle Scholar
  22. Fries V, Krockert T, Grolig F and Galland P (2002) Statoliths in phycomyces: spectrofluorometric characterization of octahe-dral protein crystals. J. Plant Physiol 159: 39-47CrossRefGoogle Scholar
  23. Fujihira K, Kurata T, Watahiki MK, Karahara I and Yamamoto KT (2000) An agravitropic mutant of Arabidop-sis, endodermal-amyloplast less 1, that lacks amyloplasts in hypocotyl endodermal cell layer. Plant Cell Physiol 41: 1193-1199PubMedCrossRefGoogle Scholar
  24. Fukaki H and Tasaka M (1999) Gravity perception and gravit-ropic response of inflorescence stems in Arabidopsis thaliana. Adv Space Res 24: 763-770PubMedCrossRefGoogle Scholar
  25. Fukaki H, Fujisawa H and Tasaka M (1996) How do plant shoots bend up?: the initial step to elucidate the molecular mechanisms of shoot gravitropism using Arabidopsis thaliana. J Plant Res 109: 129-137PubMedCrossRefGoogle Scholar
  26. Fukaki H, Wysocka-Diller J, Kato T, Fujisawa H, Benfey PN and Tasaka M (1998) Genetic evidence that the endodermis is essential for shoot gravitropism in Arabidopsis thaliana. Plant J 14: 425-430PubMedCrossRefGoogle Scholar
  27. Grolig F, Herkenrath H, Pumm T, Gross A and Galland P (2004) Gravity susception by buoyancy: floating lipid glob-ules in sporagiophores of Phycomyces. Planta 218: 658-667PubMedCrossRefGoogle Scholar
  28. Guan C, Rosen ES, Boonsirichai K, Poff KL and Masson PH (2003) The ARG1-LIKE2 gene of Arabidopsis functions in a gravity signal transduction pathway that is genetically distinct from the PGM pathway. Plant Physiol 133: 1-13CrossRefGoogle Scholar
  29. Haberlandt G (1900) Uber die Perzeption des geotropischen Reizes. Ber Deutsch Bot Ges 18: 261-272Google Scholar
  30. Hangarter RP (1997) Gravity, light and plant form. Plant Cell Environ 20: 796-800PubMedCrossRefGoogle Scholar
  31. Haswell ES (2003) Gravity perception: how plants stand up for themselves. Curr Biol 13: R761-R763PubMedCrossRefGoogle Scholar
  32. Hejnowicz Z, Sondag C, Alt W and Sievers A (1998) Temporal course of graviperception in intermittently stimulated cress roots. Plant Cell Environ 21: 1293-1300PubMedCrossRefGoogle Scholar
  33. Himmelspach R, Wymer CL, Lloyd CW and Nick P (1999) Gravity-induced reorientation of cortical microtubules ob-served in vivo. Plant J 18: 449-453PubMedCrossRefGoogle Scholar
  34. Hoson T, Kamisaka S, Masuda Y, Yamashita M and Buchen B (1997) Evaluation of the three-dimensional clinostat as a simulator of weightlessness. Planta: 203: S187-S197PubMedCrossRefGoogle Scholar
  35. Hou G, Mohamalawari DR and Blancaflor EB (2003) Enhanced gravitropism of roots with a disrupted cap actin cytoskeleton. Plant Physiol 131: 1360-1373PubMedCrossRefGoogle Scholar
  36. Hou G, Kramer VL, Wang Y-S, Chen R, Perbal G, Gilroy S and Blancaflor EB (2004) The promotion of gravitropism in Arabidopsis roots upon actin disruption is coupled with the extended alkalinization of the columella cytoplasm and a per-sistent lateral auxin gradient. Plant J 39: 113-125PubMedCrossRefGoogle Scholar
  37. Jaffe MJ, Leopold AC and Staples RC (2002) Thigmo responses in plants and fungi. Am J Bot 89: 375-382CrossRefGoogle Scholar
  38. Kato T, Morita MT, Fukaki MH, Yamauchi Y, Uehara M, Ni-ihama M and Tasaka M (2002a) SGR2, a phospholipase-like protein, and ZIG/SGR4, a SNARE, are involved in the shoot gravitropism of Arabidopsis. Plant Cell 14: 33-46CrossRefGoogle Scholar
  39. Kato T, Morita MT and Tasaka M (2002b) Role of endodermal cell vacuoles in shoot gravitropism. J Plant Growth Regul 21: 113-119CrossRefGoogle Scholar
  40. Kimbrough JM, Salinas-Mondragon R, Boss WF, Brown CS and Sederoff HW (2004) The fast and transient transcriptional net-work of gravity and mechanical stimulation in the Arabidopsis root apex. Plant Physiol 136: 2790-2805PubMedCrossRefGoogle Scholar
  41. Kiss JZ (1997) Gravitropism in the rhizoids of the alga Chara: a model system for microgravity research. Biol Bull 192: 134-136PubMedCrossRefGoogle Scholar
  42. Kiss JZ (2000) Mechanisms of the early phases of plant gravit-ropism. Crit Rev Plant Sci 19: 551-573PubMedCrossRefGoogle Scholar
  43. Kiss JZ and Sack FD (1989) Reduced gravitropic sensitivity in roots of a starch-deficient mutant of Nicotiana sylvestris. Planta 180: 123-130PubMedCrossRefGoogle Scholar
  44. Kiss JZ and Sack FD (1990) Severely reduced gravitropism in dark-grown hypocotyls of a starch-deficient mutant of Nico-tiana sylvestris. Plant Physiol 94: 1867-1873PubMedCrossRefGoogle Scholar
  45. Kiss JZ, Hertel R and Sack FD (1989) Amyloplasts are necessary for full gravitropic sensitivity in roots of Arabidopsis thaliana. Planta 177: 198-206PubMedCrossRefGoogle Scholar
  46. Kiss JZ, Wright JB and Caspar T (1996) Gravitropism in roots of intermediate-starch mutants of Arabidopsis. Physiol Plant 97: 237-244PubMedCrossRefGoogle Scholar
  47. Kiss JZ, Guisinger MM, Miller AJ and Stackhouse KS (1997) Reduced gravitropism in hypocotyls of starch-deficient mu-tants of Arabidopsis. Plant Cell Physiol 38: 518-525PubMedGoogle Scholar
  48. Kiss JZ, Katembe WJ and Edelmann RE (1998a) Gravitropism and development of wild-type and starch-deficient mutants of Arabidopsis during space flight. Physiol Plant 102: 493-502CrossRefGoogle Scholar
  49. Kiss JZ, Guisinger MM and Miller AJ (1998b) What is the thresh-old amount of starch necessary for full gravitropic sensitivity? Adv Space Res 21: 1197-1202CrossRefGoogle Scholar
  50. Kiss JZ, Edelmann RE and Wood PC (1999) Gravitropism of hypocotyls of wild-type and starch-deficient Arabidopsis seedlings in space flight studies. Planta 209: 96-103PubMedCrossRefGoogle Scholar
  51. Kiss JZ, Miller KM, Ogden LA and Roth KK (2002) Pho-totropism and gravitropism in lateral roots of Arabidopsis. Plant Cell Physiol 43: 35-43PubMedCrossRefGoogle Scholar
  52. Kiss JZ, Mullen JL, Correll MJ and Hangarter RP (2003) Phy-tochromes A and B mediate red-light-induced positive pho-totropism in roots. Plant Physiol 131: 1411-1417PubMedCrossRefGoogle Scholar
  53. Knight TA (1806) On the direction of the radicle and germen during the vegetation of seeds. Philos Trans R Soc 99: 108-120Google Scholar
  54. Kordyum E and Guikema J (2001) An active role of the amy-loplasts and nuclei of root statocytes in graviperception. Adv Space Res 27: 951-956PubMedCrossRefGoogle Scholar
  55. Kraft TFB, van Loon JJWA and Kiss JZ (2000) Plastid position in Arabidopsis columella cells is similar in microgravity and on a random-positioning machine. Planta 211: 415-422PubMedCrossRefGoogle Scholar
  56. Kuznetsov OA and Hasenstein KH (1996) Magnetophoretic in-duction of root curvature. Planta 198: 87-94PubMedCrossRefGoogle Scholar
  57. Kuznetsov OA and Hasenstein KH (1997) Magnetophoretic in-duction of curvature in coleoptiles and hypocotyls. J Exp Bot 48: 1951-1957PubMedGoogle Scholar
  58. Lee HY, Bahn SC, Kang YM, Lee KH, Kim HJ, Noh EK, Palta JP, Shin JS and Ryu SB (2003) Secretory low molecular weight phospholipase A plays important roles in cell elongation and shoot gravitropism in Arabidopsis. The Plant Cell 15: 1990-2002PubMedCrossRefGoogle Scholar
  59. MacCleery SA and Kiss JZ (1999) Plastid sedimentation ki-netics in roots of wild-type and starch-deficient mutants of Arabidopsis. Plant Physiol 120: 183-192PubMedCrossRefGoogle Scholar
  60. Mochizuki S, Harada A, Inada S, Sugimoto-Shirasu K, Stacey N, Wada T, Ishiguro S, Okada K and Sakai T (2005) The Ara-bidopsis WAVY GROWTH 2 protein modulates root bend-ing in response to environmental stimuli. Plant Cell 17: 537-547PubMedCrossRefGoogle Scholar
  61. Morita MT, Kato T, Nagafusa K, Saito C, Ueda T, Nakano A and Tasaka M (2002) Involvement of the vacuoles of the endoder-mis in the early process of shoot gravitropism in Arabidopsis. Plant Cell 14: 47-56PubMedCrossRefGoogle Scholar
  62. Moseyko N, Zhu T, Chang H-S, Wang X and Feldman LJ (2002) Transcription profiling of the early gravitropic response in Ara-bidopsis using high-density oligonucleotide probe microar-rays. Plant Physiol 130: 720-728PubMedCrossRefGoogle Scholar
  63. Muday GK (2000) Maintenance of asymmetric cellular localiza-tion of an auxin transport protein through interaction with the actin cytoskeleton. J Plant Growth Regul 19: 385-396PubMedGoogle Scholar
  64. Mullen JL and Hangarter RP (2003) Genetic analysis of the grav-itropic set-point angle in lateral roots of Arabidopsis. Adv Space Res 31: 2229-2236PubMedCrossRefGoogle Scholar
  65. Mullen JL, Wolverton C, Ishikawa H and Evans ML (2000) Kinetics of constant gravitropic stimulus responses in Ara-bidopsis roots using a feedback system. Plant Physiol 123: 665-670PubMedCrossRefGoogle Scholar
  66. N ĕmec B (1900) U¨ ber die Art der Wahrnehmung des Schw-erkraftes bei den Pflanzen. Ber Deutsch Bot Ges 18: 241-245Google Scholar
  67. Nick P, Bergfeld R, Sch äfer E and Schopfer P (1990) Unilateral reorientation of microtubules at the outer epidermal wall dur-ing photo-and gravitropic curvature of maize coleoptiles and sunflower hypocotyls. Planta 181: 162-168PubMedCrossRefGoogle Scholar
  68. Okada K and Shimura Y (1990) Reversible root tip rotation in Arabidopsis seedlings induced by obstacle-touching stimulus. Science 250: 274-276PubMedCrossRefGoogle Scholar
  69. Ottenschl äger I, Wolff P, Wolverton C, Bhalerao RP, Sandberg G, Ishikawa H, Evans M and Palme K (2003) Gravity-regulated differential auxin transport from columella to lateral root cap cells. Proc Natl Acad Sci USA 100: 2987-2991CrossRefGoogle Scholar
  70. Palmieri M and Kiss JZ (2005) Disruption of the f-actin cyto-skeleton limits statolith movement in Arabidopsis hypocotyls. J Exp Bot 56, 2539-2550PubMedCrossRefGoogle Scholar
  71. Perbal G, Driss-Ecole D, Rutin J and Sall é G (1987) Graviper-ception of lentil seedling roots grown in space (Spacelab D1 Mission). Physiol Plant 70: 119-126PubMedCrossRefGoogle Scholar
  72. Perbal G, Driss-Ecole D, Tewinkel M and Volkmann D (1997) Statocyte polarity and gravisensitivity in seedling roots grown in microgravity. Planta 203: S57-S62PubMedCrossRefGoogle Scholar
  73. Perbal G, Jeune B, Lefranc A, Carnero-Diaz E and Driss-Ecole D (2002) The dose-response curve of the gravitropic reaction: a reanalysis. Physiol Plant 114: 336-342PubMedCrossRefGoogle Scholar
  74. Plieth C and Trewavas AJ (2002) Reorientation of seedlings in the earth’s gravitational field induces cytosolic calcium transients. Plant Physiol 129: 786-796PubMedCrossRefGoogle Scholar
  75. Ruppel NJ, Hangarter RP and Kiss JZ (2001) Red-light-induced positive phototropism in Arabidopsis roots. Planta 212: 424-430PubMedCrossRefGoogle Scholar
  76. Ryu SB (2004) Phospholipid-derived signaling mediated by phospholipase A in plants. Trends Plant Sci 9: 229-235PubMedCrossRefGoogle Scholar
  77. Sack FD (1991) Plant gravity sensing. Int Rev Cytology 127: 193-252CrossRefGoogle Scholar
  78. Sack FD (1997) Plastids and gravitropic sensing. Planta 203: S63-S68PubMedCrossRefGoogle Scholar
  79. Saito C, Morita MT, Kato T and Tasaka M (2005) Amyloplasts and vacuolar membrane dynamics in the living graviperceptive cell of the Arabidopsis inflorescence stem. Plant Cell: in pressGoogle Scholar
  80. Salisbury FB (1993) Gravitropism: changing ideas. Hort Rev 15: 233-278Google Scholar
  81. Schr öter K, L äuchli A and Sievers A (1975) Mikroanalytische identifikation von bariumsulfat-kristallen in en statolithen der rhizoide von Chara fragilis. Desv Planta 122: 213-225CrossRefGoogle Scholar
  82. Scott AC and Allen NS (1999) Changes in cytosolic pH within Arabidopsis root columella cells play a key role in the early signaling pathway for root gravitropism. Plant Physiol 121: 1291-1298PubMedCrossRefGoogle Scholar
  83. Sedbrook JC, Chen R and Masson PH (1999) ARG1 (Altered Response to Gravity) encodes a DNA-J-like protein that po-tentially interacts with the cytoskeleton. Proc Nat Acad Sci USA 96: 1140-1145PubMedCrossRefGoogle Scholar
  84. Sievers A and Braun M (1996) The root cap: structure and func-tion. In: Waizel Y, Eshel A and Kafkafi U (eds) Plant Roots: The Hidden Half, 2nd ed, pp 31-49. Marcel Dekker, New YorkGoogle Scholar
  85. Sievers A, Buchen B and Hodick D (1996) Gravity sensing in tip-growing cells. Trends Plant Sci 1: 273-279PubMedCrossRefGoogle Scholar
  86. Silady RA, Kato T, Lukowitz W, Sieber P, Tasaka M and Somerville CR (2004) The gravitropism defective 2 mutants of Arabidopsis are deficient in a protein implicated in endo-cytosis in Caenorhabditis elegans. Plant Physiol 136: 3095-3103PubMedCrossRefGoogle Scholar
  87. Smith JD, Todd P and Staehelin LA (1997) Modulation of sta-tolith mass and grouping in white clover (Trifolium repens) grown in lg, microgravity and on the clinostat. Plant J 12: 1361-1373PubMedCrossRefGoogle Scholar
  88. Soga K, Wakabayashi K, Kamisaka S and Hoson T (2004) Graviperception in growth inhibition of plant shoots under hypergravity conditions produced by centrifugation is inde-pendent of that in gravitropism and may involve mechanore-ceptors. Planta 218: 1054-1061PubMedCrossRefGoogle Scholar
  89. Spector I, Braet F, Shochet NR and Bubb MR (1999) New anti-actin drugs in the study of the organization and function of the actin cytoskeleton. Microsc Res Tech 47: 18-37PubMedCrossRefGoogle Scholar
  90. Staves MP, Wayne R and Leopold AC (1995) Detection of gravity-induced polarity of cytoplasmic streaming in Chara. Protoplasma 188: 38-48PubMedCrossRefGoogle Scholar
  91. Staves MP, Wayne R and Leopold AC (1997) The effect of the external medium on the gravity-induced polarity of cytoplas-mic streaming in Chara corallina (Characeae). Am J Bot 84: 1516-1521PubMedCrossRefGoogle Scholar
  92. Steed CL, Taylor LK and Harrison MA (2004) Red light regu-lation of ethylene biosynthesis and gravitropism in etiolated pea stems. Plant Growth Regul 43: 117-125PubMedCrossRefGoogle Scholar
  93. Sun H, Basu S, Brady SR, Luciano RL and Muday GK (2004) Interactions between auxin transport and the actin cytoskele-ton in developmental polarity of Fucus distichus embryos in response to light and gravity. Plant Physiol 135: 266-278PubMedCrossRefGoogle Scholar
  94. Swatzell LJ and Kiss JZ (2000) Journey toward the center of the earth: plant gravitropism. Biologist 47: 229-233PubMedGoogle Scholar
  95. Swatzell LJ, Edelmann RE, Makaroff CA and Kiss JZ (1999) Integrin-like proteins are localized to plasma membrane frac-tions, not plastids, in Arabidopsis. Plant Cell Physiol 40: 173-183PubMedGoogle Scholar
  96. Takahashi H (1997) Hydrotropism: the current state of our knowledge. J Plant Res 110: 163-169PubMedCrossRefGoogle Scholar
  97. Trewavas A (1992) What remains of the Cholodny-Went theory?: a forum. Plant Cell Environ 15: 759-794Google Scholar
  98. Vitha S, Yang M, Kiss JZ and Sack FD (1998) Light promotion of hypocotyl gravitropism of a starch-deficient tobacco mutant correlates with plastid enlargement and sedimentation. Plant Physiol 116: 495-502PubMedCrossRefGoogle Scholar
  99. Volkmann D and Sievers A (1979) Graviperception in multicel-lular organs. In: Haunt W and Feinleib M (eds) Encyclopedia of Plant Physiol, Vol 7, pp 573-600. Springer-Verlag, BerlinGoogle Scholar
  100. Volkmann D Winn-Borner U and Waberzeck K (1993) Gravire-sponsiveness of cress seedlings and structural status of pre-sumptive statocytes from the hypocotyl. J Plant Physiol 142: 710-716Google Scholar
  101. Wang X (2004) Lipid signaling. Curr Opin Plant Biol 7: 329-336PubMedCrossRefGoogle Scholar
  102. Wang-Cahill F and Kiss JZ (1995) The statolith compartment in Chara rhizoids contains carbohydrate and protein. Am J Bot 82: 220-229PubMedCrossRefGoogle Scholar
  103. Wayne R, Staves MP and Leopold AC (1990) Gravity-dependent polarity of cytoplasmic streaming in Nitellopsis. Protoplasma 155: 43-57PubMedCrossRefGoogle Scholar
  104. Wayne R and Staves MP (1996) A down to earth model of gravisensing or Newton’s law of gravitation from the apple’s perspective. Physiol Plant 98: 917-921PubMedCrossRefGoogle Scholar
  105. Weise SE and Kiss JZ (1999) Gravitropism of inflorescence stems in starch-deficient mutants of Arabidopsis. Int J Plant Sci 160: 521-527PubMedCrossRefGoogle Scholar
  106. Weise SE, Kuznetsov OA, Hasenstein KH and Kiss JZ (2000) Curvature in Arabidopsis inflorescence stems is limited to the region of amyloplast displacement. Plant Cell Physiol 41: 702-709PubMedGoogle Scholar
  107. Whippo CW and Hangarter RP (2003) Second positive pho-totropism results from coordinated co-action of the pho-totropins and cryptochromes. Plant Physiol 132: 1499-1507PubMedCrossRefGoogle Scholar
  108. Wolverton C, Mullen JL, Ishikawa H and Evans ML (2000) Two distinct regions of response drive differential growth in Vigna root electrotropism. Plant Cell Environ 23: 275-1280CrossRefGoogle Scholar
  109. Wolverton C, Mullen JL, Ishikawa H and Evans ML (2002a) Root gravitropism in response to a signal originating outside of the cap. Planta 215: 153-157CrossRefGoogle Scholar
  110. Wolverton C, Ishikawa H and Evans ML (2002b) The kinetics of root gravitropism: dual motors and sensors. J Plant Growth Regul 21: 102-112CrossRefGoogle Scholar
  111. Yamamoto K and Kiss JZ (2002) Disruption of the actin cy-toskeleton results in the promotion of gravitropism in inflo-rescence stems and hypocotyls of Arabidopsis. Plant Physiol 128: 669-681PubMedCrossRefGoogle Scholar
  112. Yamamoto K, Pyke KA and Kiss JZ (2002) Reduced gravit-ropism in inflorescence stems and hypocotyls, but not roots, of Arabidopsis mutants with large plastids. Physiol Plant 114: 627-636PubMedCrossRefGoogle Scholar
  113. Yano D, Sato M, Saito C, Sato MH, Morita MT and Tasaka M (2003) A SNARE complex containing SGR3/AtVAM3 and ZIG/VTI11 in gravity-sensing cells is important for Arabidopsis shoot gravitropism. Proc Natl Acad Sci USA 100: 8589-8594PubMedCrossRefGoogle Scholar
  114. Yoder TL, Zheng H-Q, Todd P and Staehelin LA (2001) Amylo-plast sedimentation dynamics in maize columella cells support a new model for the gravity-sensing apparatus of roots. Plant Physiol 125: 1045-1060PubMedCrossRefGoogle Scholar
  115. Zheng H, von Mollard GF, Kovaleva V, Stevens TH and Raikhel NV (1999) The plant vesicle-associated SNARE AtVTI1a likely mediates vesicle transport from the trans-Golgi network to the prevacuolar compartment. Mol Biol Cell 10: 2251-2264PubMedGoogle Scholar
  116. Zheng H-Q and Staehelin LA (2001) Nodal ER, a novel form of ER found exclusively in gravity-sensing columella cells. Plant Physiol 125: 252-265PubMedCrossRefGoogle Scholar

Copyright information

© Springer 2007

Authors and Affiliations

  • Maria Palmieri
    • 1
  • John Z. Kiss
    • 1
  1. 1.Botany DepartmentMiami UniversityOxfordUSA

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