Dormancy release, germination, and electrolyte leakage from apple embryos during stratification in the presence of sucrose
Dormancy release, germination, and electrolyte leakage from apple embryos during stratification in the presence of sucrose
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DOI：
10.1023/a:1020209522938
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发表时间：
2002-09-01
影响因子：
1.4
通讯作者：
Daskalyuk, AP
中科院分区：
文献类型：
--
作者：
Daskalyuk, AP
利用苹果种子萌发的3个特征（即第10天发芽率、平均萌发时间和每10天发芽量）定量描述了苹果种子分层过程中休眠释放的动态，从而对种子的生存力、休眠释放率和种子异质性进行了评价。结果表明，苹果种子具有生理和生理相结合的休眠特征，种皮和胚包膜参与了物理休眠的维持。在分层培养基中添加蔗糖加速了种子休眠的释放，并改善了决定种子发芽能力的所有特性。胚胎的电解质泄漏在分层过程中几乎没有变化，这与所有种子在整个休眠期间保持活力的事实一致。我们假设种子休眠的释放不是一个单阶段的过程。
The dynamics of dormancy release during the stratification of apple (Malus domestica Borkh.) seeds was quantitatively described by three characteristics of seeds germination: the percentage of seeds that germinated by the tenth day, mean germination time, and the sum of seeds germinated in each of ten days (Timson's parameter), which allowed the assessment of the viability, the rate of dormancy release, and seed heterogeneity. We showed that apple seeds were characterized by a combined (physical and physiological) type of dormancy, with the seed coat and the embryo envelope being involved in the maintenance of physical dormancy. The addition of sucrose to the stratification medium accelerated the release of seed dormancy and improved all characteristics that determine seed germinability. Electrolyte leakage from embryos hardly changed during stratification, which agrees with the fact that all seeds remained viable throughout the entire period of dormancy. We assume that the release of seed dormancy is not a single-stage process.