水杨酸对植物种子及幼苗抗逆性的影响

夏方山; 毛培胜; 闫慧芳; 王明亚

doi:DOI:10.11829/j.issn.1001-0629.2013-0346

水杨酸对植物种子及幼苗抗逆性的影响

中国农业大学动物科技学院草业科学北京市重点实验室中国农业大学草地研究所,北京 100193

基金项目:

国家“十二五”科技支撑计划课题(2011BAD17B01-02)

现代牧草产业技术体系(CARS-35)

摘要: 种子萌发及幼苗建成是植物生命周期的关键时期,也是对外界环境因子最敏感的时期之一。本文重点从耐盐性、耐旱性、耐热性、耐寒性及耐重金属等逆境条件,综述了水杨酸(Salicylic acid,SA)对种子萌发及幼苗生长的影响研究进展。分析认为,SA处理为提高逆境条件下种子萌发及幼苗建成提供了一种有效的方法。它通过增加渗透物质的含量,激活抗氧化酶系统,并调节α-淀粉酶活性等来保持细胞膜结构的稳定性,从而提高种子及其幼苗的耐逆性,但不能根除逆境伤害。SA对种子萌发及幼苗生长具有双重效应,且SA的最佳浓度会受植物种类、处理时间、方式、逆境条件及程度影响。明确其对种子萌发及幼苗生长的作用机制,可以为农业生产提供理论依据。

关键词:

种子 /
水杨酸 /
抗逆性 /
萌发 /
幼苗

English

Effects of salicylic acid on stress resistance of seeds and seedling

China Agricultural University, College of Animal Science and Technology, Beijing Key Laboratory of Grassland Science, Department of Grassland Science, Beijing 100193, China

Received Date: 2013-07-07
Publish Date: 2014-07-14

Abstract: Seed germination and seedling growth played an important role in plant life cycle and were the most sensitive period to environmental factors. The research of salicylic acid for seed germination and seedling growth were reviewed in this paper which includes the tolerance of seeds and seedling to some environmental stresses such as salts, drought, heat, chilling and heavy metal. The comprehensive analysis showed that salicylic acid provided effective protections for seed germination and seedling growth by increasing osmotic substances, activating antioxidant enzyme and α-amylase to maintain the stability of membrane structure under stress although these protections cannot completely clean up the damages. Salicylic acid had dual effects on the seed germination and seedling growth whose optimum concentration was effected by plant species, treatments time, and stress. The explanation of the mechanism how salicylic acid improve plant tolerance to environmental stresses in seed germination and seedling growth stages could provide a theoretical basis for agriculture production.

Keywords:

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参考文献(1)

[1]

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水杨酸对植物种子及幼苗抗逆性的影响

English

Effects of salicylic acid on stress resistance of seeds and seedling

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