, Volume 43, Issue 2, pp 283–287 | Cite as

Retention and allocation of 14C assimilates by maintenance leaves and harvest index of tea (Camellia sinensis L.)

  • T. S. Barman
  • J. K. Saikia
Brief Communication


Partitioning of 14C-labelled photosynthates to various parts of un-pruned tea clones TV1 and TV25 was assessed in vivo by exposing maintenance leaves to 14CO2 at monthly intervals throughout the year. The plants from shoot apex to root tip were divided into twelve components to assess the allocation and retention of 14C-photosynthates by the maintenance foliage. Out of the total photosynthates produced by the maintenance leaves, only 11.08 % was allocated to the commercially useful harvestable two and a bud shoots which is accepted as the harvest index of tea. The photosynthetically active maintenance leaves retained 19.05 % while 24.56 % was distributed to the branches. The bottom and the top parts of the trunk utilized 7.44 and 7.21 %, respectively. The thick roots at the base of the trunk, medium sized roots, pencil size roots, and feeder roots imported 7.28, 7.72, 7.65, and 8.01 % of 14C assimilates, respectively. Except retention by leaves, all the plant parts of vigorous clone TV25 required higher percentage of assimilates than TV1. The mean quantities of net photosynthates utilized by the stem and the roots were 69.37 and 30.63 %, respectively.

Additional key words

clone differences roots shoot translocation 


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. Barman, T.S., Barua, U., Sarma, A.K.: Physiological importance of maintenance foliage in tea. — Proc. 31st Tocklai Conf. Pp. 42–49. Jorhat 1992.Google Scholar
  2. Barman, T.S., Barua, U., Sarma, A.K.: Effect of light and shade on diurnal variation of photosynthesis, stomatal conductance and transpiration rate in tea. — Proc. int. Symp. Tea Sci. Human Health. Pp. 208–218. Tea Research Association, Kolkata 1993.Google Scholar
  3. Barman, T.S., Barua, U., Sarma, A.K., Bordoloi, R.K.: Maintenance foliage in yield vs. standard clones. — Two Bud 1: 35–36, 1991.Google Scholar
  4. Barman, T.S., Sarma, A.K., Barua, U.: Sink capacity of flower buds in tea (Camellia sinensis L.). A study on assimilates translocation. — Two Bud 37: 38–40, 1990.Google Scholar
  5. Barua, D.N.: Assimilation Characteristics of Detached Leaves of Tea and Sunflower. — Ph.D. Thesis. Cambridge University, Cambridge 1953.Google Scholar
  6. Barua, D.N.: Effect of age and carbon-dioxide concentration on assimilation by detached leaves of tea and sunflower. — J. agr. Sci. (Cambridge) 55: 413–421, 1960.Google Scholar
  7. Barua, D.N.: Effect of light intensity on assimilation characteristics of detached tea leaves. — J. agr. Sci. (Cambridge) 63: 265–271, 1964.Google Scholar
  8. Barua, D.N.: Gross and net productivity in tea. — Proc. 29th Tocklai Conf. Pp. 38–44. Jorhat 1981.Google Scholar
  9. Barua, D.N.: Production and partition of dry matter. — In: Barua, D.N. (ed.): Science and Practice in Tea Culture. Pp. 369–395. Tea Research Association, Kolkata 1989.Google Scholar
  10. Burgess, P.J., Carr, M.K.V.: Responses of young tea (Camellia sinensis) clones to drought and temperature. II Dry matter production and partitioning. — Exp. Agr. 32: 377–394, 1996.Google Scholar
  11. Das, S.C., Barua, D.N.: Mechanism of tea dormancy: Effect of temperature on growth and dormancy of tea plant in North East India. — Two Bud 28: 15–18, 1987.Google Scholar
  12. Daie, J.: Carbohydrate partitioning and metabolism in crops. — Hort. Rev. 7: 69–146, 1985.Google Scholar
  13. Davis, J.M., Loescher, W.H.: [14C]-assimilate translocation in the light and dark in celery (Apium graveolens) leaves of different ages. — Physiol. Plant. 79: 656–662, 1990.CrossRefGoogle Scholar
  14. Gaic, S.B., William, S., Burgess, P.J., Carr, M.K.V.: Effect of light, temperature, irrigation and fertilizer rate in tea (Camellia sinensis). — Exp. Agr. 29: 291–306, 1993.Google Scholar
  15. Hakamata, K., Sakai, S.: Translocation and redistribution of 14CO2-photosynthates assimilated in winter leaves in young tea plant. — Study Tea 58: 11–20, 1980.Google Scholar
  16. Jiao, J., Grodzinski, B.: The effect of leaf temperatures and photorespiratory conditions on export of sugars during steady state photosynthesis in Salvia splendens. — Plant Physiol. 111: 169–178, 1996.PubMedGoogle Scholar
  17. Manivel, L., Hussain, S., Sarma, A.K.: Seasonal changes in distribution of photosynthates in tea. — Two Bud 28: 15–18, 1981.Google Scholar
  18. Manivel, L., Hussain, S.: Photosynthesis in tea. I. Contribution of photosynthates to pluckable shoots by maintenance leaves. — Two Bud 29: 13–16, 1982.Google Scholar
  19. Manivel, L., Hussain, S.: Relative sink capacity of developing tea shoots. — Two Bud 33: 90–93, 1986.Google Scholar
  20. Mohotti, A.J., Lawlor, D.W.: Diurnal variation of photosynthesis and photoinhibition in tea: effects of irradiance and nitrogen supply during growth in the field. — J. exp. Bot. 53: 313–322, 2002.CrossRefPubMedGoogle Scholar
  21. Murty, R.S.R., Sharma, V.S.: Canopy architecture in tea (Camellia L. spp.). — J. Plantation Crops 14: 119–125, 1986.Google Scholar
  22. Rajkumar, R.: Photosynthesis and partitioning of assimilates in relation to productivity in tea. — Proc. 2001 int. Conf. O-Cha (tea) Culture and Sci. Pp. 25–28. Shizuoka 2001.Google Scholar
  23. Raj Kumar, R., Manivel, L., Marimuthu, S.: Longevity and factors influencing photosynthesis in tea leaves. — Photosynthetica 35: 41–46, 1998.CrossRefGoogle Scholar
  24. Roberts, G.R., Keys, A.J.: The mechanism of photosynthesis in the tea plant (Camellia sinensis L.). — J. exp. Bot. 29: 1403–1407, 1978.Google Scholar
  25. Smith, B.G., Burgess, P.J., Carr, M.K.V.: Effects of clone and irrigation on the stomatal conductance and photosynthetic rate of tea (Camellia sinensis). — Exp. Agr. 30: 1–16, 1994.Google Scholar
  26. Squire, G.R.: Seasonal changes in photosynthesis of tea (Camellia sinensis L.). — J. appl. Ecol. 14: 303–316, 1977.Google Scholar
  27. Tanton, T.W.: Some factors limiting yield of tea (Camellia sinensis). — Exp. Agr. 15: 187–191, 1979.Google Scholar
  28. Yen, C.R., Koch, K.E.: Developmental changes in translocation and localization of 14C-labeled assimilates in grapefruit: light and dark CO2 fixation in leaves and fruits. — J. amer. Soc. hort. Sci. 115: 815–819, 1990.Google Scholar
  29. Wang, Z., Yin, Y., Sun, X.: The effect of DPC (N,N-dimethyl piperdinium chloride) on the 14CO2 assimilation and partitioning of 14C assimilates within the cotton plants interplanted in a wheat stand. — Photosynthetica 31: 197–202, 1995.Google Scholar

Copyright information

© Institute of Experimental Botany, Academy of Sciences of the Czech Republic, Praha 2005

Authors and Affiliations

  • T. S. Barman
    • 1
  • J. K. Saikia
    • 1
  1. 1.Tocklai Experimental StationTea Research AssociationJorhatIndia

Personalised recommendations