School of Integrative Biology, University of Illinois at Urbana-Champaign, 515 Morrill Hall, 505 South Goodwin Avenue, Urbana, IL 61801, USA.
School of Integrative Biology, University of Illinois at Urbana-Champaign, 515 Morrill Hall, 505 South Goodwin Avenue, Urbana, IL 61801, USA.
Trends Plant Sci. 2015 Mar;20(3):165-75. doi: 10.1016/j.tplants.2014.11.007. Epub 2014 Dec 19.
Endoreduplication, the replication of the genome without mitosis, leads to an increase in the cellular ploidy of an organism over its lifetime, a condition termed 'endopolyploidy'. Endopolyploidy is thought to play significant roles in physiology and development through cellular, metabolic, and genetic effects. While the occurrence of endopolyploidy has been observed widely across taxa, studies have only recently begun to characterize and manipulate endopolyploidy with a focus on its ecological and evolutionary importance. No compilation of these examples implicating endoreduplication as a generalized response to stress has thus far been made, despite the growing evidence supporting this notion. We review here the recent literature of stress-induced endopolyploidy and suggest that plants employ endoreduplication as an adaptive, plastic response to mitigate the effects of stress.
内复制，即没有有丝分裂的基因组复制，导致生物体在其生命周期中细胞倍性增加，这种情况被称为“内多倍性”。内多倍性被认为通过细胞、代谢和遗传效应在生理和发育中发挥重要作用。虽然内多倍性的发生在各个分类群中都有广泛观察到，但最近才开始研究其特征和操纵，重点是其生态和进化重要性。尽管越来越多的证据支持这一观点，但迄今为止，还没有将这些将内复制作为对压力的普遍反应的例子进行汇编。在这里，我们回顾了最近关于应激诱导的内多倍性的文献，并提出植物将内复制作为一种适应性、可塑性的反应来减轻应激的影响。
