Role of the Cytokinin-Activated Type-B Response Regulators in Hormone Crosstalk

Plants

G.Eric Schaller¹  YanO. Zubo¹ 

[1] Dartmouth College, Department of Biological Sciences, Hanover, NH 03755, USA;

关键词: cytokinin;    type-b arr;    chip-seq;    phytohormone;    two-component system;    multistep phosphorelay;    crosstalk;    transcription;   

DOI  :  10.3390/plants9020166

来源: DOAJ

【 摘 要 】

Cytokinin is an important phytohormone that employs a multistep phosphorelay to transduce the signal from receptors to the nucleus, culminating in activation of type-B response regulators which function as transcription factors. Recent chromatin immunoprecipitation-sequencing (ChIP-seq) studies have identified targets of type-B ARABIDOPSIS RESPONSE REGULATORs (ARRs) and integrated these into the cytokinin-activated transcriptional network. Primary targets of the type-B ARRs are enriched for genes involved in hormonal regulation, emphasizing the extensive crosstalk that can occur between cytokinin, auxin, abscisic acid, brassinosteroids, gibberellic acid, ethylene, jasmonic acid, and salicylic acid. Examination of hormone-related targets reveals multiple regulatory points including biosynthesis, degradation/inactivation, transport, and signal transduction. Here, we consider this early response to cytokinin in terms of the hormones involved, points of regulatory crosstalk, and physiological significance.

【 授权许可】

Unknown