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核农学报  2015 

花生种子休眠性的影响因素

DOI: 10.11869/j.issn.100-8551.2015.07.1392, PP. 1392-1398

Keywords: 花生,种子,休眠性,内源激素

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Abstract:

为了鉴别花生品种种子休眠性差异,探讨花生种子休眠萌发机制,本研究以16个花生品种(系)为材料,进行种子休眠特性的研究。结果显示,16个品种(系)种子休眠性有差异,干种子发芽率变幅为0~100%;其中花育25号、花育28号和徐花13号干种子发芽率为100%,强休眠品种花育52号鲜种子发芽率和干种子发芽率均为0。相同品种随成熟度增加,发芽率提高,种子休眠性下降;相同品种相同发育时期鲜种子休眠性强于干种子休眠性。内源激素分析表明,高水平内源ABA含量、低水平GA含量以及低GA/ABA比值对维持花生吸胀种子的休眠状态有积极作用。休眠态种子与乙烯利破除休眠种子相比较,乙烯利破除休眠种子的内源GA含量迅速上升,ABA含量略微下降,GA/ABA比值迅速上升。本研究为花生种子休眠及休眠解除过程中内源激素的作用提供了理论参考。

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