摘要
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。
Peanut is an important oil and economic crop in China. Seed dormancy of peanut （Arachis hypogaea L. ） is an important agronomic trait which can affect quality, yield and seed quality in agricultural production. In this study, seeds from 16 cultivars/lines were applied in seed dormancy test. Results showed that the germination rate of dry seeds from the 16 cultivars/lines ranged from 0 to 100%. The germination frequencies of dry seeds from Huayu25, Huayu28 and Xuhual3 were 100% , while the germination frequencies of fresh seeds and dry seeds from the strong dormancy variety Huayu52 were 0. Seed dormancy was closely related to maturity and seed moisture content. Endogenous hormone analysis showed that high ABA content, low GA content and low GA/ABA ratio played a positive role to maintain dormancy. In contrast to dormant seed, endogenous GA content during dormant released seed by ethephon rising rapidly, the content of ABA decreased slightly, and the ratio of GA/ABA increased rapidly. The study provided a reference for influencing factors of seed dormancy and dormancy release, especial endogenous hormone.
出处
《核农学报》
CAS
CSCD
北大核心
2015年第7期1392-1398,共7页
Journal of Nuclear Agricultural Sciences
基金
山东省良种工程
青岛市民生计划(14-2-3-34-nsh)
山东省农科院重大成果培育项目(2015CGPY03)
关键词
花生
种子
休眠性
内源激素
peanut, seed, dormancy, endogenous hormone
