种子半透层研究进展

种子半透层是指在一些植物种的种子中存在的一层半透性组织,其允许种子内外水分和气体的通透,而限制或阻碍溶质的交换。种子半透层存在于种皮或胚乳部位,通常由纤维素、角质、软木脂或胼胝质等组成。半透层随着种子的发育而逐渐形成,其存在位置和化学组成具有物种多样性。半透层在种子发育、萌发和活力检测中具有重要价值。该文主要对近年来国内外有关种子半透层的特性、位置、化学组成和研究方法等方面的研究进展进行综述,并分析了目前存在的问题,提出了今后研究方向。

Research Advances in Semi-permeable Layer of Seed

The semi-permeable layer is defined as the ability of seeds to allow water uptake and gas exchange while at the same time restricting or preventing solute diffusion which occurred in some plant species.The location of a semi-permeable layer is in the seed coat or endosperm.The chemical nature of this layer is cellulose,cutin,suberin or callose and is formed during the process of the seeds development.The site and chemical composition of this layer have the diversity of species.The important value of this layer in seed development,germination and seed vigour test are discussed.This paper reviews research on the characterization,location,chemical composition and research methods of the seed semi-permeable layer and some suggestions have been made for future research work.