植物细胞壁伸展蛋白的功能与利用

Plant extensins function and their potential genetic manipulation in crops

伸展蛋白是一类富含羟脯氨酸的糖蛋白,是植物细胞壁中重要的结构蛋白。伸展蛋白家族基因广泛存在于多种植物中,参与植物细胞壁网络结构形成与修饰、植物细胞伸长、根生长发育等过程,并且影响植物机械强度、倒伏抗性和各种逆境胁迫反应。本文拟从蛋白结构、进化关系、生物学功能等方面介绍植物伸展蛋白近期研究进展,并初步提出了此类基因在农作物和能源植物遗传改良中的利用。

Extensins are the typical hydroxyproline-rich glycoproteins （HRGPs）, which are classified as a su- perfamily of cell wall structural proteins. As extensins are ubiquitous in plant kingdom, they have been exam- ined to involve in plant cell wall network construction and remodeling, plant cell elongation, and root growth and development. More recently, extensins have been demonstrated to play an important role in plant mechani- cal strength, plant lodging and stress resistances. Hence, this study briefly analyzed protein structures and ge- netic evolution of the extensins family, updated recent research progress about extensins functions and proposed a hypothetic model about their potential applications in crop genetic improvement.