Some studies on the metabolism and growth of malta oranges

  • Jai Chand Luthra
  • Indar Singh Chima


  1. 1.

    The respiratory activity, relative growth rate, nitrogen content and the march of carbohydrates and acidity have been studied throught its development from adolescence to maturity.

  2. 2.

    A curve characteristie of the respiration of fruits has been obtained and the results are in accord with the findings of Kidd, Wardlaw and Leonard and B. N. Singh. The respiration intensity is very high during the adolescent stage and falls off rapidly, prior to second maximum which marks the onset of colour changes in the fruit during maturation.

  3. 3.

    The growth rate and nitrogen content are highest during the earlier stages and decline continuously towards the end.

  4. 4.

    The respiratory activity, growth rate and the nitrogen values run parallel to each other and statistical studies exhibit a very high and positive correlation between them.

  5. 5.

    Reducing sugars, sucrose and total sugars steadily accumulate from adolescence to maturity. The reducing sugars however show a decline towards the end and are highest just before the onset of climacteric rise in respiration.

  6. 6.

    The total titrable acids gradually increase till 170th day, but fall down later on.

  7. 7.

    The total solids are highest in the beginning when the fruit is young but later on decrease on account of the progressive hydration which follows subsequently.



Relative Growth Rate Total Sugar Total Solid Respiratory Activity Greenish Yellow 
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.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. Archbold, H. K.Ann. Bot., 1925,39.Google Scholar
  2. Blackman, V. H.Ibid., Ann. Bot., 1919,33.Google Scholar
  3. Blackman, V. H.New Phytologist, 1920,19.Google Scholar
  4. Gustafson, F. G.Plant Physiology, 1929.Google Scholar
  5. Kidd. F., and West, C.Great Britain Dopt. Sci. and Ind. Res. Food Invest. Bd. Rpt.,, 1924.Google Scholar
  6. Kidd, F., and West, C.Proc. Roy. Inst. of Great Britain, 1934.Google Scholar
  7. Luthra, J. C., and Chima, I. S. PalladinInd. Jour. Agric. Sci., 1931,1, Part VI.Palladin’s Planil Physiology edited by Livingston, 1922, Chapter VIII.Google Scholar
  8. Singh, B. N., Seshagiri, P. V. V., and Gupta, S. S.Ind. Jour. Agric. Sci., 1937,7, Part I.Google Scholar
  9. Skinner, W. W. “The Official and Tentative Methods of Analysis,”Assoc. Offi. Agric. Chem. Washington, 1930, 3rd Edition, p. 593.Google Scholar
  10. Wardlaw, C. W., and Leonard, E. R.Journ. Trop. Agri. Trini., 1935, 12.Google Scholar

Copyright information

© Indian Academy of Sciences 1940

Authors and Affiliations

  • Jai Chand Luthra
    • 1
  • Indar Singh Chima
    • 1
  1. 1.Punjab Agricultural College and Research InstituteLyallpur

Personalised recommendations