阿拉伯半乳糖蛋白在高等植物中的分布及功能

Distribution and Function of Arabinogalactan-proteins in Higher Plant

阿拉伯半乳糖蛋白(arabinogalactan-proteins,AGPs)是一类含有丰富羟脯氨酸或脯氨酸的结构复杂的糖蛋白,其广泛分布在细胞壁、原生质体和质膜上。在植物的根部、花粉管、花粉以及柱头、花柱等组织中均有表达,AGPs在被子植物营养生长和生殖发育均起着非常重要的作用,可能参与了根形态建成与发育,根系与土壤微生物互相作用,并影响花粉管的生长、花粉粒的成熟和柱头上萌发等。现就其分子结构、分类以及主要研究方法,对植物根组织以及花粉、花粉管、柱头部位AGPs的分布和可能功能进行了综述。

Arabinogalactan-proteins（AGPs）are hydroxyproline-rich or proline-rich proteoglycans and can be found in the cell wall apoplast and plasma membrane of roots and other flower organs such as pollen,pollen tubes and styles.AGPs have important roles in various aspects of plant growth and development involved in cellular growth and development of roots,microbe interaction with roots and functions about pollen formation and pollen-tube growth.This paper presented the structural components,characteristics and major tools used to study AGPs,then focused on its distribution and functions properties in root tissues and reproductive organs（pollen,pollen tube and stigma）.