小麦种子在不同保存条件下的生活力丧失特性研究
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“十二五”科技支撑计划(2013BAD01B01)和农业部农作物种质资源保护利用专项资助项目(NB08-2130135)


Viability Loss of Wheat Seeds under Different Storage Conditions
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    摘要:

    近年来种子在低温种质库和室温保存条件下的生活力丧失特性研究日益受到关注,但是与其重要性相比,目前很少见有文献报道此方面进展。本文中我们监测了在中期库、室温和人工加速老化条件下小麦种子的生活力变化,以了解种子在这些保存条件下的生活力变化特性。结果表明,三种条件下所有种子的存活曲线均呈反S形,这种特点不受保存条件的影响。随着保存温度的降低,种子生活力丧失速度降低,反S形曲线的平台期和种子寿命延长。我们采用T检验来判断平台期和种子生活力快速下降期之间的转折点(Pt),发现小麦种子在不同条件下保存时,其Pt均十分接近,在82.2%到83.6%之间。本文讨论了将Pt以及其他生理指标作为种子保存过程中生活力快速下降的预警指标的可能性。

    Abstract:

    Seed viability loss at low temperature genebank and ambient storage received increasing concerns, but comparing with its importance, few publications dressed this question. In this paper, viability monitoring data of wheat (Triticum aestivum Linn.) seed from a midterm genebank, ambient storage, as well as an accelerated ageing experiment were quantified to get further understanding of seed ageing under these conditions. The results showed that seed longevity of all accessions followed normal distribution, and that seed survival curves showed inverse-S shape, which received no obvious effects from storage conditions. The rate of seed viability loss decreased, and the plateau phase and seed longevity increased as the storage temperature reduced. T-test was adapted to determine the turning point (Pt) between the plateau phase and viability sharp decline phase of the seed survival curve. The results showed that the Pt under different storage conditions were quite close, which varied between 82.2% and 83.6%. The possible role of Pt and some physiological indexes as indicators for seed viability loss during germplasm storage were discussed.

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卢新雄,辛霞,陈晓玲,等.小麦种子在不同保存条件下的生活力丧失特性研究[J].植物遗传资源学报,2013,14(4):588-593.

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  • 收稿日期:2013-01-25
  • 最后修改日期:2013-02-27
  • 录用日期:2013-06-07
  • 在线发布日期: 2013-06-07
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