Light response and photosynthesis in sorghum under field conditions

Authors

  • Y. R. KENJLE
  • M. C. VARSHNEYA
  • T. R. U. NAIDU

DOI:

https://doi.org/10.54302/mausam.v46i3.3269

Keywords:

PPFD, Rate of photosynthesis, Light response curves, Rectangular hyperbola, Sol-ghum genotypes.

Abstract

ABSTRACT. The diurnal variation of rate of photosynthesis (l') with photosynthetic photon flux density (PPFD) model of light response curves and the relationship between PPFD and P were studied for two postmonsoon (rabi) sorghum genotypes, viz.. M35- I and RSV-9R under field conditions at Pune. The half maximal values. i.e., PPFD level at which P=Pmax/2 obtained were 1251 and 937 umolm-2s-1 for M35-l and RSV.9R respectively. The potential rates of photosynthesis were 65,79 and 64.52  umolm-2S-1 whereas the observed maximum rates of photosynthesis were lower. 40.93 and 46.66 umolm-2s-1 in M35-1 and RSV-9R Respectively, due to effect of air temperatures under the field conditions, n1e maximum rate of photosynthesis determined from the model decreased with delay in the sowing of the crop. Correlation coefficients between PPFD and rate of photosynthesis were 0,794 and 0,708 for M35-1 and RSV-9R respectively. The PPFD received and rate of photosynthesis decreased significantly with delay in sorghum sowing.

 

 

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Published

01-07-1995

How to Cite

[1]
Y. R. . KENJLE, . M. C. . VARSHNEYA, and . T. R. U. . NAIDU, “Light response and photosynthesis in sorghum under field conditions”, MAUSAM, vol. 46, no. 3, pp. 303–306, Jul. 1995.

Issue

Vol. 46 No. 3 (1995): MAUSAM

Section

Shorter Contribution

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