Interrelationship between Leaf Gas-Exchange Characteristics,Area Leaf Mass,and Yield in Soybean (Glycine max L. Merr) Genotypes |
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Authors: | Subrahmanyam Desiraju |
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Institution: | (1) Plant Physiology Laboratory, G.B. Pant University of Agriculture and Technology, Hill Campus, Ranichauri-, 249 199 Uttarakhand, India |
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Abstract: | Variability in leaf gas-exchange traits in thirteen soybean (Glycine max L. Merr) genotypes was assessed in a field experiment conducted at high altitude (1 950 m). Leaf net photosynthetic rate (P
N) exhibited a high degree of variability at all the growth stages studied. P
N and other gas-exchange parameters exhibited a seasonal pattern that was similar for all the genotypes. P
N rate was highest at seed filling stage. P
N was positively and significantly associated with aboveground dry matter and seed yield. The area leaf mass (ALM) exhibited a strong positive association with leaf P
N, aboveground dry matter, and seed yield. The positive association between ALM, P
N, and seed yield suggests that this simple and easy to measure character can be used in breeding programmes as a surrogate for higher photosynthetic efficiency and eventually higher yield. |
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Keywords: | area leaf mass net photosynthetic rate stomatal conductance transpiration rate water use efficiency |
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