Department of Biological Sciences, 6044 Gilman Laboratories, Dartmouth College, Hanover, New Hampshire 03755, USA.
BMC Biol. 2010 May 7;8:55. doi: 10.1186/1741-7007-8-55.
The circadian clock enhances fitness through temporal organization of plant gene expression, metabolism and physiology. Two recent studies, one in BMC Evolutionary Biology, demonstrate through phylogenetic analysis of the CCA1/LHY and TOC1/PRR gene families that the common ancestor of monocots and eudicots had components sufficient to construct a circadian clock consisting of multiple interlocked feedback loops.
生物钟通过组织植物基因表达、代谢和生理活动来提高生物适应性。最近的两项研究,一项发表在 BMC 进化生物学杂志上,通过对 CCA1/LHY 和 TOC1/PRR 基因家族的系统发育分析表明,单子叶植物和双子叶植物的共同祖先已经具备构建由多个相互连锁的反馈环组成的生物钟的元件。