【摘要】 利用荧光发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及低产大豆黑农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)的含量均高于黑农37 ,但不同的品种差异幅度有所不同。吸收光谱表明高产大豆叶绿体对光能有更强的吸收能力 ;Mg2 + 对高产大豆叶绿体PSI和PSII之间激发能分配的调节能力均高于低产品种 ;高产大豆叶片PSII原初光能转化效率(Fv/Fm)和PSII活性(Fv/Fo) ,光化学猝灭系数(qP)及PSII总的光化学量子产量均高于低产品种相应的值 ;而高产品种的非光化学猝灭系数(qN)低于低产品种。实验说明 ,高产大豆叶片具有与产量潜力相关的较高光能吸收和原初转化能力。更多还原

【Abstract】 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.更多还原