囊泡运输参与植物盐胁迫应答调控  

Vesicle trafficking is involved in regulation of plant salinity stress response

作　　者：张小萌 刘宇麒 张海龙 赵振杰 李立新[1] ZHANG Xiaomeng;LIU Yuqi;ZHANG Hailong;ZHAO Zhenjie;LI Lixin(Key Laboratory of Saline-alkali Vegetation Ecology Restoration,Ministry of Education,College of Life Sciences,Northeast Forestry University,Harbin 150040,China)

机构地区：[1]东北林业大学生命科学学院,东北盐碱植被恢复与重建教育部重点实验室,哈尔滨150040

出　　处：《植物生理学报》2020年第5期905-912,共8页Plant Physiology Journal

基　　金：国家自然科学基金(31570246);中央高校基本科研业务费专项资金(2572019CT03)。

摘　　要：植物为了适应环境变化,逐渐进化形成许多植物特异性调控机制来感知外界信号并做出应答。盐胁迫是常见的非生物胁迫之一,高盐胁迫会抑制植物发育。高盐胁迫条件下,质膜上的离子通道将胞质中的一部分Na^+向细胞外排出,同时,内体(endosome)将一部分胞质Na^+转运到液泡进行分隔,以此降低胞质Na^+浓度,减少盐离子对细胞的毒害作用。植物细胞通过调节胞吞和胞吐作用之间的平衡来应对环境变化。最近的研究发现了一些囊泡运输在盐胁迫应答中的新的调控机制,包括胞吞和胞吐途径中的常规途径和非常规途径,其中一些途径在盐胁迫条件下的活性变得更高,用以维持物质运输的稳态。很多盐胁迫相关的囊泡运输调控因子[如SNAREs(soluble N-ethylmaleimide-sensitive factor attachment protein receptors)]在胁迫应答中发挥重要作用。植物的盐胁迫应答机制的研究比较广泛,但是囊泡运输在植物盐胁迫应答过程中的调控机制尚不清楚。这里,我们总结了囊泡运输在盐胁迫应答中调控机制研究的最新进展。To adapt to environmental changes,plants have gradually evolved diverse regulatory mechanisms that sense extracellular signals and responses to stresses.Salt stress inhibits plant development.Under high salinity stress,to reduce ion toxicity on cells,cytosolic Na^+is exported by ion channels on the plasma membrane.At the same time,endosomes compartmentalize cytosolic Na^+and subsequently transport to vacuoles for compartmentalize.Plants response to environmental stimuli by a balance between endocytosis and exocytosis.Recent studies revealed some novel pathways/mechanisms of endocytosis and exocytosis,the conventional and unconventional pathways,some of them become more active under salinity stress to maintain homeostasis of material transport.Many salt stress-related regulatory factors of vesicle transport[such as soluble N-ethylmaleimide-sensitive factor attachment protein receptors(SNAREs)]play important roles in stress response.Despite broad investigation,it is still obscure about the mechanisms underlying vesicle trafficking in response to salinity stress.Here,we highlight recent advances in the mechanisms underlying membrane trafficking under salinity stress.

关 键 词：盐胁迫应答 胞吞和胞吐作用 囊泡运输 SNARE 

分 类 号：Q945.78[生物学—植物学]