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Photosynthesis, chlorophyll content and ribulose diphosphate carboxylase activity in relation to yield in wheat genotypes

Published online by Cambridge University Press:  27 March 2009

K. K. Murthy  and
M. Singh
K. K. Murthy
Affiliation:
Department of Agronomy, College of Agriculture, G.B. Pant University of Agriculture and TechnologyPantnagar-26314:5, India
M. Singh
Affiliation:
Department of Agronomy, College of Agriculture, G.B. Pant University of Agriculture and TechnologyPantnagar-26314:5, India
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Summary

Photosynthetic rates, chlorophyll content and activity of ribulose 1,5-diphosphate carboxylase (RuDPC) were determined for 18 genotypes of wheat (Triticum aestivum L.) in pot culture. Measurements were made at various growth stages. Correlation studies between physiological characteristics and seed yield were made at each stage separately.

Genotypic variations were observed at different growth and developmental stages in photosynthetic rates (1·8–2·7-fold), chlorophyll contents (1·2-fold) and enzyme activities (2-fold). Chlorophyll content and enzymic activity increased in plant leaves with advancing age while apparent rates of photosynthesis decreased.

RuDPC activity in flag leaf at anthesis showed significant positive correlation with grain yield (r = 0·55). Other attributes did not show significant association with grain yield.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 93 , Issue 1 , August 1979 , pp. 7 - 11
Copyright
Copyright © Cambridge University Press 1979

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