Lough Tony J, Lucas William J
Agrigenesis Biosciences, Auckland, New Zealand.
Annu Rev Plant Biol. 2006;57:203-32. doi: 10.1146/annurev.arplant.56.032604.144145.
Recent studies have revealed the operation of a long-distance communication network operating within the vascular system of higher plants. The evolutionary development of this network reflects the need to communicate environmental inputs, sensed by mature organs, to meristematic regions of the plant. One consequence of such a long-distance signaling system is that newly forming organs can develop properties optimized for the environment into which they will emerge, mature, and function. The phloem translocation stream of the angiosperms contains, in addition to photosynthate and other small molecules, a variety of macromolecules, including mRNA, small RNA, and proteins. This review highlights recent progress in the characterization of phloem-mediated transport of macromolecules as components of an integrated long-distance signaling network. Attention is focused on the role played by these proteins and RNA species in coordination of developmental programs and the plant's response to both environmental cues and pathogen challenge. Finally, the importance of developing phloem transcriptome and proteomic databases is discussed within the context of advances in plant systems biology.
最近的研究揭示了高等植物维管系统中存在的一种长距离通讯网络。该网络的进化发展反映了将成熟器官感知到的环境输入传递到植物分生组织区域的需求。这种长距离信号系统的一个结果是，新形成的器官能够发育出针对其即将出现、成熟和发挥功能的环境进行优化的特性。被子植物的韧皮部运输流除了含有光合产物和其他小分子外，还包含多种大分子，包括信使核糖核酸（mRNA）、小核糖核酸（small RNA）和蛋白质。本综述重点介绍了作为综合长距离信号网络组成部分的韧皮部介导的大分子运输特性的最新进展。注意力集中在这些蛋白质和RNA种类在协调发育程序以及植物对环境线索和病原体挑战的反应中所起的作用。最后，在植物系统生物学进展的背景下讨论了开发韧皮部转录组和蛋白质组数据库的重要性。
