超干种子耐贮藏性的细胞学及生理生化基础

Cytological,Physiological and Biochemical Basis of Storability of Ultradry Seeds

种子超干贮藏是近年来种子生物学研究和植物种质资源保存领域的研究热点。本文综述了种子超干贮藏研究的进展 ,包括 :(1)超干种子的细胞和亚细胞结构变化 ;(2 )超干处理对种子水分状态的影响以及与劣变反应速率的关系 ;(3)超干种子中的自由基伤害和有毒物质的积累 ;(4)超干种子中的内源抗氧剂 ;(5 )糖类物质以及两性物质对极度脱水种子细胞的保护。此外 。

Seed ultradry storage is recently a hot research spot in the fields of seed biology and plant germplasm resources preservation.Advances in seed ultradry storage research were reviewed in this paper,implicated in (1) changes in cellular and subcellular structure of ultradry seeds;(2)effects of ultradry treatment on water state of seeds,and the relationship between the changes in water state and reaction rate of seed deterioration;(3)free radical damage and accumulation of toxic products in ultradry seeds;(4)endogenous antioxidants in ultradry seeds,and (5) protective roles of sugar and amphiphilic molecules against extreme desiccation in seed cells.In addition,perspective of resaerch on seed ultradry storage has been made in this paper.