高产大豆品种的高光效特性

利用荧光射光谱技术及荧光诱导动力学技术，研究了不同基因型大豆，高产大豆黑农４０和黑农４１及你燕大豆黑农３７的光能吸收，传递和转化等特性。结果表明，高产大豆的叶绿素（Ｃｈｌ）和类胡萝卜素（Ｃａｒ）的含量增高于黑农３７，但不同的品种种差异幅度有所不同。吸收光谱表明高产大豆叶经体对光能有更强的吸收能力；Ｍｇ＾２＋对高产大豆叶绿体ＰＳＩ和ＰＳⅡ之间激发能分配的有力均高于低产品种；高产大豆叶片ＰＳⅡ原初光能

THE HIGH PHOTOSYNTHESIS-EFFICIENCY CHARACTERISTICSOF HIGH-YIELD VARIETIES IN SOYBEAN

Chla fluorescence induction kinetics and fluorescence emission spectra were used to study photosynthetic characteristics of three soybean varieties. Heinong 40 and Heinong 41 are high_yield, Heinong 37 is a low-yield variety. Results indicated that the contents of Chlorophll(Chl) and Carotenoid (Car) in high-yield varieties were higher than that in Heinong 37. It was also found that the light absorption capacity of the chloroplast of high-yield soybean was greater than that of Heinong 37. The capability of the excitation energy distribution between PSII and PSI regulated by Mg2 was higher than that of Heinong 37. Higher values of Fv/Fm, Fv/Fo and qP were found in the high-yield soybean varieties, however the qN in Heinong 37 was higher than that in high-yield soybean varieties. It is concluded that high-yield soybean varieties had the prominent abilities of light energy absorption and of primary conversion of light energy relating to the yield potential of soybean variety.