胞泌复合体在植物中的功能研究进展

囊泡运输是真核生物的一种重要的细胞学活动, 广泛参与多种生物学过程。该过程主要包括囊泡形成、转运、拴系及与目的膜融合4个环节。目前已知9种多蛋白亚基拴系复合体参与不同途径的胞内转运过程, 其中, 胞泌复合体(exocyst complex)介导了运输囊泡与质膜的拴系过程。对胞泌复合体调控机制的认识主要源于酵母(Saccharomyces cerevisiae)和动物细胞的研究。近年来, 植物胞泌复合体的研究也取得了较大进展, 初步结果显示复合体在功能方面具有一些植物特异的调控特点, 广泛参与植物生长发育和逆境响应。该文主要综述胞泌复合体在植物中的研究进展, 旨在为植物胞泌复合体功能研究提供参考。

Research Advances in the Functions of Exocyst Complex in Plants

Vesicle trafficking is the biological process involving in budding, translocation, tethering and membrane fusion in all eukaryotic cells. Nine multisubunit tethering complexes (MTCs) are known to play roles in the intracellular transport, and the exocyst complex facilitates the tethering between transport vesicles and the plasma membrane (PM). The regulatory mechanism of the exocyst complex had been extensively studied in yeast and animals, whereas rapid research progress on plant exocyst has been made in recent years. Recent findings show that the plant exocyst complex has unique regulatory characteristics and is widely involved in plant growth, development and stress responses. Here we summarize research progress on the plant exocyst complex to provide a reference for future study of exocyst function in plants.