Lehmann Fabio, Hardtke Christian S
Department of Plant Molecular Biology, University of Lausanne, Biophore Building, CH-1015 Lausanne, Switzerland.
Department of Plant Molecular Biology, University of Lausanne, Biophore Building, CH-1015 Lausanne, Switzerland.
Curr Opin Plant Biol. 2016 Feb;29:9-15. doi: 10.1016/j.pbi.2015.10.011. Epub 2015 Dec 5.
The secondary thickening of plant organs in extant dicotyledons is a massive growth process that constitutes the major carbon sink in perennial, woody plants. Yet, our understanding of its molecular genetic control has been mostly obtained by its analysis in an herbaceous annual model, Arabidopsis. Recent years have seen increased interest in this somewhat under-researched topic, and various (non-)cell autonomous factors that guide the extent and vascular patterning of secondary growth have been identified. Concomitantly, a more detailed understanding of vascular differentiation processes has been obtained through analyses of primary growth, mostly in the root meristem. A future challenge will be the integration of these patterning and differentiation modules together with cambial activity into the 4-dimensional frame of secondary thickening.
现存双子叶植物中植物器官的次生加厚是一个大规模的生长过程，是多年生木本植物中的主要碳汇。然而，我们对其次生加厚分子遗传控制的理解大多是通过在草本一年生模式植物拟南芥中进行分析而获得的。近年来，人们对这个研究较少的主题的兴趣有所增加，并且已经鉴定出各种指导次生生长范围和维管模式的（非）细胞自主因子。与此同时，通过对主要是根分生组织的初生生长分析，对维管分化过程有了更详细的了解。未来的一个挑战将是把这些模式和分化模块与形成层活动整合到次生加厚的四维框架中。
