C两优系列杂交稻组合生育后期剑叶生理生化特性研究

doi:10.3969/j.issn.1001-7216.2010.02.11

摘要/Abstract

摘要： 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7 d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。

关键词: 杂交稻, 生理特性, 生物化学特性, 功能叶

Abstract: 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 with Shangyou 63 the contents of chlorophyll, soluble sugar and soluble protein in flag leaves of a series of hybrid rice combinations derived from C815S were higher, while TBARS content was lower. The activities of SOD and POD were significantly higher than those of the control at 7 days after heading, and decreased more slowly. ΦPSII value and qP value of flag leaves decreased at the late growth stage, but ΦPSII value and qP value of flag leaves were higher than those of the control, while qN value increased and was lower than those of the control. The net photosynthetic rate of flag leaves was higher compared with the control. These results suggest that slow senescence and more strongly photosynthetic capability in flag leaves at the late growth stage is the physiological basis of hyrid rice combinations derived from C815S.

Key words: hybrid rice, physiological characteristics, biochemical characteristics, functional leaves

唐文邦,张桂莲,肖应辉,邓化冰,范科,刘国华,陈立云. C两优系列杂交稻组合生育后期剑叶生理生化特性研究[J]. 中国水稻科学 2010,24(2): 169-174 . , DOI: 10.3969/j.issn.1001-7216.2010.02.11 .

TANG Wenbang, ZHANG Guilian, XIAO Yinghui, DENG Huabing,FAN Ke, LIU Guohua, CHEN Liyun*. Physiological and Biochemical Characteristics in Flag Leaves of a Series of Hybrid Rice Combinations Derived from C815S at the Late Growth Stage [J]. Chinese Journal of Rice Science 2010,24(2): 169-174 ., DOI: 10.3969/j.issn.1001-7216.2010.02.11 .

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