孕穗期和抽穗期弱光胁迫对2个杂交稻组合生理特性及产量的影响

本试验对孕穗期和抽穗期弱光胁迫及不同弱光胁迫时长条件下,杂交稻组合‘冈优527’和‘内香优31’的一些生理特性及产量表现进行了研究.结果表明,弱光胁迫导致‘冈优527’和‘内香优31’的干物质积累和产量显著降低,对‘内香优31’的影响大于‘冈优527’,抽穗期遮光的影响大干孕穗期,遮光14 d的处理大于7d处理.弱光胁迫导致产量下降的途径各不相同,总粒数和结实事均有不同程度的下降是主要因素,千粒重受弱光影响较小;弱光胁迫下的叶面积显著增加而剑叶Pn值显著下降,且抽穗期的影响更大,胁迫时间越长,变化幅度越大,对‘内香优31’的影响大于‘冈优527’;弱光胁迫下Chla和Chlb含量增加,Chla...

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Bibliographic Details
Published in西南农业学报 Vol. 27; no. 2; pp. 559 - 566
Main Author 朱萍 贺阳冬 杨志远 孙永健 马均
Format Journal Article
LanguageChinese
Published 成都农业科技职业学院,四川温江611130 2014
四川农业大学水稻研究所/农业部西南作物生理生态与耕作重点实验室,四川温江,611130%四川农业大学水稻研究所/农业部西南作物生理生态与耕作重点实验室,四川温江611130
Subjects
产量
弱光胁迫
杂交水稻
生理特性
Hybrid rice
产量
弱光胁迫
Physiological characteristics
Grain yield
Low-light stress
生理特性
杂交水稻
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ISSN1001-4829

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Summary:本试验对孕穗期和抽穗期弱光胁迫及不同弱光胁迫时长条件下,杂交稻组合‘冈优527’和‘内香优31’的一些生理特性及产量表现进行了研究.结果表明,弱光胁迫导致‘冈优527’和‘内香优31’的干物质积累和产量显著降低,对‘内香优31’的影响大于‘冈优527’,抽穗期遮光的影响大干孕穗期,遮光14 d的处理大于7d处理.弱光胁迫导致产量下降的途径各不相同,总粒数和结实事均有不同程度的下降是主要因素,千粒重受弱光影响较小;弱光胁迫下的叶面积显著增加而剑叶Pn值显著下降,且抽穗期的影响更大,胁迫时间越长,变化幅度越大,对‘内香优31’的影响大于‘冈优527’;弱光胁迫下Chla和Chlb含量增加,Chla/b的比值减小,对低光效组合的影响较大,在孕穗期影响大干抽穗期;在弱光胁迫下,POD酶活性和可溶性糖含量有所降低,而SOD酶活性及MDA、Pro含量均显著提高,且与品种、胁迫时期和时长密切相关.
Bibliography:ZHU Ping , HE Yang-.dong, YANG Zhi-yuan ,SUN Yong-jian ,biA Jun （ 1. Rice Research Institute of Sichuan Agricultural University Key Laboratory of Crop Ecophysiology and Fanning System in Southwest, Min- istry of Agriculture, Sichuan Wenjiang 611130, China; 2. Chengdu Vocational College of Agricultural Science and Technology, Sichuan Wen- jiang 611130, China）
51-1213/S
Hybrid rice Gangyou 527 and Neixiang you 31 were used to investigate the effects of low-light stress for 14 days and 7 days at booting stage and heading stage on grain yidd and some physiological characteristics.The results showed that the dry matter accumulation and grain yield of Gangyou 527 and Neixiangyou 31 decreased significantly with low-light stress and Neixiangyou 31 dropped more sharply than Gangyou 527.Low-light stress at booting stage and 14 days low-light stress had greater impact on dry matter accumulation and grain yield than that at heading stage and 7 days low-light stress,respectively.Though low-light stress affected grain yield
ISSN:1001-4829