Division of Applied Life Science (BK21-WCU Program), Plant Molecular Biology and Biotechnology Research Center, Gyeongsang National University, Jinju 660-701, South Korea.
Wiley Interdiscip Rev RNA. 2013 May-Jun;4(3):279-93. doi: 10.1002/wrna.1160. Epub 2013 Mar 27.
Plants possess dynamic networks of intercellular communication that are crucial for plant development and physiology. In plants, intercellular communication involves a combination of ligand-receptor-based apoplasmic signaling, and plasmodesmata and phloem-mediated symplasmic signaling. The intercellular trafficking of macromolecules, including RNAs and proteins, has emerged as a novel mechanism of intercellular communication in plants. Various forms of regulatory RNAs move over distinct cellular boundaries through plasmodesmata and phloem. This plant-specific, non-cell-autonomous RNA trafficking network is also involved in development, nutrient homeostasis, gene silencing, pathogen defense, and many other physiological processes. However, the mechanism underlying macromolecular trafficking in plants remains poorly understood. Current progress made in RNA trafficking research and its biological relevance to plant development will be summarized. Diverse plant regulatory mechanisms of cell-to-cell and systemic long-distance transport of RNAs, including mRNAs, viral RNAs, and small RNAs, will also be discussed.
植物具有动态的细胞间通讯网络，这对植物的发育和生理至关重要。在植物中，细胞间通讯涉及配体-受体的质外体信号以及胞间连丝和韧皮部介导的共质体信号的组合。大分子（包括 RNA 和蛋白质）的细胞间运输已成为植物中细胞间通讯的一种新机制。各种形式的调节 RNA 通过胞间连丝和韧皮部在不同的细胞边界上移动。这种植物特有的、非细胞自主的 RNA 运输网络也参与了发育、养分稳态、基因沉默、病原体防御和许多其他生理过程。然而，植物中大分子运输的机制仍知之甚少。本文将总结 RNA 运输研究的最新进展及其与植物发育的生物学相关性。还将讨论包括 mRNAs、病毒 RNA 和小 RNA 在内的 RNA 在细胞间和系统长距离运输的各种植物调控机制。
