Institute of Agrophysics, Polish Academy of Sciences, Doświadczalna 4, 20-290, Lublin, Poland.
Department of Plant Anatomy and Cytology, Maria Curie-Skłodowska University, Akademicka 19, 20-033, Lublin, Poland.
Plant Physiol Biochem. 2019 Feb;135:9-18. doi: 10.1016/j.plaphy.2018.11.023. Epub 2018 Nov 22.
Arabinogalactan proteins (AGPs), i.e. a subfamily of hydroxyproline-rich proteins (HRGPs), are widely distributed in the plant kingdom. For many years, AGPs have been connected with the multiple phases of plant reproduction and developmental processes. Currently, extensive knowledge is available about their various functions, i.e. involvement in pollen grain formation, initiation of pollen grain germination, pollen tube guidance in the transmission tissue of pistil and ovule nucellus, and function as a signaling molecule during cell-cell communication. Although many studies have been performed, the mechanism of action, the heterogeneous molecule structure, and the connection with other extracellular matrix components have not been sufficiently explained. The aim of this work was to gather and describe the most important information on the distribution of AGPs in gametophyte development. The present review provides a summary of the first reports about AGPs and the most recent knowledge about their functions during male and female gametophyte formation.
阿拉伯半乳聚糖蛋白（AGPs），即富含羟脯氨酸的蛋白（HRGPs）的一个亚家族，广泛分布于植物界。多年来，AGPs 一直与植物繁殖和发育过程的多个阶段有关。目前，人们对其各种功能有了广泛的了解，例如参与花粉粒形成、启动花粉粒萌发、在雌蕊和胚珠珠心的传输组织中引导花粉管、作为细胞-细胞通讯过程中的信号分子。尽管已经进行了许多研究，但作用机制、异质分子结构以及与其他细胞外基质成分的联系尚未得到充分解释。本工作的目的是收集和描述 AGPs 在配子体发育中的分布的最重要信息。本综述提供了关于 AGPs 的最早报告的摘要以及关于其在雌雄配子体形成过程中的最新功能知识的总结。
