Instituto de Biologia Experimental e Tecnológica, Apartado 12, 2781-901 Oeiras, Portugal.
Plant Cell Rep. 2013 Jun;32(6):867-83. doi: 10.1007/s00299-013-1420-7. Epub 2013 Mar 27.
Xylem provides long-distance transport of water and nutrients as well as structural support in plants. The development of the xylem tissues is modulated by several internal signals. In the last decades, the bloom of genetic and genomic tools has led to increased understanding of the molecular mechanisms underlying the function of the traditional plant hormones in xylem specification and differentiation. Critical functions have been assigned to novel signaling molecules, such as thermospermine. These signals do not function independently, but interact in a manner we are only now beginning to understand. We review the current knowledge of hormone signaling pathways and their crosstalk in cambial cell initiation and maintenance, and in xylem specification and differentiation.
木质部为植物提供水分和养分的远程运输以及结构支撑。木质部组织的发育受几种内部信号的调节。在过去的几十年中，遗传和基因组工具的蓬勃发展使得人们对传统植物激素在木质部形成和分化中的功能的分子机制有了更多的了解。一些新的信号分子，如热稳定多胺，被赋予了关键功能。这些信号并非独立发挥作用，而是以我们刚刚开始理解的方式相互作用。我们回顾了激素信号通路及其在形成层细胞起始和维持，以及木质部形成和分化中的串扰的最新知识。
