Integrating Hormone- and Micromolecule- Mediated Signaling with Plasmodesmal Communication

作     者：Xiao Han Jae-Yean Kim 

作者机构：Biotechnology Research Institute Chinese Academy of Agricultural Science Beijing 100081 China Division of Applied Life Science (BK21 plus program) Plant Molecular Biology & Biotechnology Research Center Gyeongsang National University Jinju 660-701Korea 

出 版 物：《Molecular Plant》 (分子植物（英文版）)

年 卷 期：2016年第9卷第1期

页      面：46-56页

核心收录：

学科分类：0710[理学-生物学] 07[理学] 09[农学] 0901[农学-作物学] 0902[农学-园艺学] 

基　　金：supported by the Basic Science Research Program through the National Research Foundation of Korea funded by the Ministry of Education funded by the Next-Generation BioGreen 21 Program(SSAC) Rural Development Administration, Republic of Korea 

主　　题：callose cell-to-cell movement hormone intercellular signaling plasmodesmata 

摘      要：Intercellular and supracellular communications through plasmodesmata are involved in vital processes for plant development and physiological responses. Micro- and macromolecules, including hormones, RNA, and proteins, serve as biological information vectors that traffic through the plasmodesmata between cells. Previous studies demonstrated that the plasmodesmata are elaborately regulated, whereby a long queue of multiple signaling molecules forms. However, the mechanism by which these signals are coupled or coor- dinated in terms of simultaneous transport in a single channel remains a puzzle. In the last few years, several phytohormones that could function as both non-cell-autonomous signals and plasmodesmal regulators have been disclosed. Plasmodesmal regulators such as auxin, salicylic acid, reactive oxygen species, gibberellic acids, chitin, and jasmonic acid could regulate intercellular trafficking by adjusting plasmodesmal permeability. Here, callose, along with β-glucan synthase and β-glucanase, plays a critical role in regulating plasmodesmal permeability. Interestingly, most of the previously identified regulators are capable of diffusing through the plasmodesmata. Given the small sizes of these molecules, the plasmo- desmata are prominent intercellular channels that allow diffusion-based movement of those signaling molecules. Obviously, intercellular communication is under the control of a major mechanism, named a feedback loop, at the plasmodesmata, which mediates complicated biological behaviors. Prospective research on the mechanism of coupling micromolecules at the plasmodesmata for developmental signaling and nutrient provision will help us to understand how plants coordinate their development and photosynthetic assimilation, which is important for agriculture.