C两优系列杂交稻组合生育后期剑叶生理生化特性研究

以汕优63为对照,对4个C两优系列杂交稻组合生育后期剑叶SPAD值、可溶性糖含量、可溶性蛋白质含量、硫代巴比妥酸反应产物含量、叶绿素荧光参数、净光合速率及超氧化物歧化酶(SOD)活性、过氧化物酶(POD)活性进行了分析。C两优系列杂交稻组合的产量比汕优63高16.7%～20.2%。C两优系列杂交稻组合在生育后期剑叶SPAD值、可溶性糖含量、可溶性蛋白质含量较高,硫代巴比妥酸反应产物含量较低;SOD和POD活性齐穗7d后显著高于对照且下降速率缓慢;剑叶叶绿素荧光参数ΦPSII值和qP值随生育进程呈下降趋势,但高于对照,而qN值则随生育进程呈增加趋势,且低于对照;生育后期剑叶净光合速率高。C两优系列杂交稻组合生育后期剑叶衰老缓慢,光合生产能力较强,可能是其高产的生理基础。

Physiological and Biochemical Characteristics in Flag Leaves of a Series of Hybrid Rice Combinations Derived from C815S at the Late Growth Stage

The contents of chlorophyll,soluble sugar,soluble protein and thiobarbituric acid reactive substance (TBARS),chlorophyll fluorescence parameters,net photosynthetic rate as well as the activities of superoxide dismutase (SOD) and peroxidase(POD) of flag leaves at the late growth stage were studied by using four hybrid rice combinations derived from C815S as material and Shanyou 63 as a control.The grain yields of the four hybrid rice combinations was 16.7% to 20.2% higher than that of Shanyou 63.Compared wit...