胞间连丝使多细胞生物成为可能：对其进化、生物发生以及在发育和免疫中的功能的新见解。

Plasmodesmata enable multicellularity: new insights into their evolution, biogenesis, and functions in development and immunity.

机构信息

Plant Gene Expression Center, USDA Agricultural Research Service, 800 Buchanan Street, Albany, CA 94710, USA.

Department of Plant and Microbial Biology, University of California, Berkeley, CA 94720, USA.

出版信息

Curr Opin Plant Biol. 2017 Feb;35:76-83. doi: 10.1016/j.pbi.2016.11.007. Epub 2016 Nov 24.

DOI:10.1016/j.pbi.2016.11.007

PMID:27889635

Abstract

Plant cells are connected by plasmodesmata (PD), cytosolic bridges that allow molecules to freely move across the cell wall. Recently resolved relationships among land plants and their algal relatives reveal that land plants evolved PD independently from algae. Proteomic and genetic screens illuminate new dimensions of the structural and regulatory pathways that control PD biogenesis. Biochemical studies demonstrate that immunological signals induce systemic defenses by moving from diseased cells through PD; subsequently, PD transport is restricted to quarantine diseased cells. Here, we review our expanding knowledge of the roles of PD in plant development, physiology, and immunity.

摘要

植物细胞通过胞间连丝（PD）连接，胞间连丝是允许分子自由穿过细胞壁的细胞质桥。最近对陆地植物及其藻类近亲的解析关系表明，陆地植物独立于藻类进化出 PD。蛋白质组学和遗传筛选阐明了控制 PD 生物发生的结构和调节途径的新维度。生化研究表明，免疫信号通过 PD 从患病细胞传递到全身，从而诱导系统防御；随后，PD 运输被限制在隔离患病细胞。在这里，我们回顾了我们对 PD 在植物发育、生理和免疫中的作用的不断增长的认识。