A Dynamic Signaling Path to Chromatin-Level Control of Plant Drought Response  

作　　者：Clara Bourbousse Fredy Barneche 

机构地区：[1]Institutde Biologie de I'Ecole Normale Superieure(IBENS),Ecole Normale Superieure,CNRS,INSERM,PSL University,75005 Paris,France

出　　处：《Molecular Plant》2019年第3期292-294,共3页分子植物（英文版）

摘　　要：As sessile organisms, plants display a high capacity for phenotypic adaptations allowing them to meet the constraints of a changing local environment. This plasticity notably originates from the aptitude of plants to adjust their development and physiology throughout their lifetime to reach an optimal trade-off between growth and fitness. As in all eukaryotes, dynamic control of plant gene expression in different cell types is dependent on multiple regulatory layers that often converge onto chromatin-based mechanisms. Dynamic control of chromatin composition and organization has a strong impact on the cellular transcriptional program, notably contributing to selective modulation of gene expression in a reversible manner. Chromatin state changes generally involve remodeling of nu cleosome positio ning, incorporatio n of nu cleosomal and lin ker histone variants, and DNA and histone modifications recognized by cognate readers. Together, these processes modulate the access and activity of trans-acting factors such as transcription factors and RNA polymerases. Temporary shifts between transcriptionally permissive and repressive chromatin states rely on various mechanisms, among which is the rapid reversion of a “responsive” chromatin status through active erasure of newly established features.

关 键 词：Dynamic SIGNALING PATH Chromatin-Level Control 

分 类 号：Q[生物学]