Institute of Forest Genetics, US Forest Service, Davis, California 95618, USA.
J Integr Plant Biol. 2010 Jan;52(1):17-27. doi: 10.1111/j.1744-7909.2010.00901.x.
Secondary growth and wood formation are products of the vascular cambium, a lateral meristem. Although the mechanisms have only recently begun to be uncovered, transcriptional regulation appears increasingly central to the regulation of secondary growth. The importance of transcriptional regulation is illustrated by the correlation of expression of specific classes of genes with related biological processes occurring at specific stages of secondary growth, including cell division, cell expansion, and cell differentiation. At the same time, transcription factors have been characterized that affect specific aspects of secondary growth, including regulation of the cambium and differentiation of cambial daughter cells. In the present review, we summarize evidence pointing to transcription as a major mechanism for regulation of secondary growth, and outline future approaches for comprehensively describing transcriptional networks underlying secondary growth.
次生生长和木材形成是维管形成层的产物，维管形成层是一种侧生分生组织。尽管这些机制最近才开始被揭示，但转录调控似乎越来越成为次生生长调控的核心。转录调控的重要性体现在特定基因类别的表达与次生生长特定阶段发生的相关生物学过程之间的相关性上，包括细胞分裂、细胞扩张和细胞分化。与此同时，已经鉴定出一些转录因子，它们影响次生生长的特定方面，包括形成层的调节和形成层细胞的分化。在本综述中，我们总结了指向转录作为调节次生生长的主要机制的证据，并概述了全面描述次生生长下转录网络的未来方法。
