Title: Research on the Method to Estimating Flag Leaf Photosynthesis Function Duration at Rice Seedling Stage by Relative Steady Phase of Chlorophyll Content
Abstract: Chlorophyll contents in different position intact and detached leaves in eight rice varieties were measured by a SPAD 502 hand held chlorophyll meter. Two periods of chlorophyll content changes in intact and detached leaves, namely relative steady phase(RSP), and rapid declined phase of chlorophyll content, were apparently observed in different rice varieties. Regression analysis results revealed a significant relationship of RSP in detached and in intact leaves and among different position leaves. Furthermore, RSP in the detached sixth and intact flag leaves in other 34 rice varieties were determined and modeled by several equations, showing that the relationship between them expressed in polynomial equation was the best due to its highest correlation coefficient (r=0.9619, P 0.01). Photosynthetic function durations in flag leaves in the other 10 rice varieties were estimated by this polynomial equation and simultaneously measured in practice. The result showed that estimated value was positively significantly correlated with measured RSP value and active photosynthesis duration, and their correlation coefficients were 0 9948 and 0.9913, respectively, further indicating the relationship between them.
Publication Year: 2001
Publication Date: 2001-01-01
Language: en
Type: article
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Cited By Count: 5
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