Long distance transport and movement of RNA through the phloem
Long distance transport and movement of RNA through the phloem
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DOI：
10.1093/jxb/erm176
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发表时间：
2008-01-01
影响因子：
6.9
通讯作者：
Buhtz, Anja
中科院分区：
文献类型：
--
作者：
Kehr, Julia;Buhtz, Anja
细胞间通讯对于植物的发育和适应环境变化至关重要。作为一种有效的细胞间通讯的策略，植物已经进化出一种植物特异性的共质网络，通过胞间连丝连接，允许细胞与细胞之间进行局部限制的信息交换。长距离的快速信息传递是通过遍布整个植物的韧皮部运输管实现的，因此即使是最远的器官也能连接起来。虽然小分子如代谢物和植物激素的通讯研究得很好，但蛋白质和RNA的细胞间运输只是最近才成为植物细胞间和长距离信号传导的新机制。特别是特定RNA的非细胞自主和系统性转运途径似乎在重要生理过程的协调中发挥关键作用，包括病毒防御，基因沉默，发育调节和营养分配。本文综述了韧皮部长距离运输系统中RNA的转运机制及其功能。
Cell-to-cell communication is essential for plant development and adaptation to environmental changes. As a strategy for efficient intercellular communication, plants have evolved a plant-specific symplasmic network connected via plasmodesmata that allows a locally restricted information exchange from cell to cell. A rapid information transfer over long distances is enabled via the phloem transport tubes that pervade the complete plant and thus connect even the most distant organs. While communication by small molecules like metabolites and phytohormones is comparably well studied, the intercellular trafficking of proteins and RNAs has only recently emerged as a novel mechanism of cell-to-cell and long-distance signalling in plants. In particular the non-cell-autonomous and systemic transport pathway for specific RNAs seems to play a key role in the co-ordination of important physiological processes, including virus defence, gene silencing, regulation of development, and nutrient allocation. This review is a summary of the current knowledge on RNAs contained in the phloem long-distance transport system, their transport mechanism, and their potential functions.