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

Dartmouth College, Department of Biological Sciences, Hanover, NH 03755, USA
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Author to whom correspondence should be addressed.
Plants 2020, 9(2), 166; https://doi.org/10.3390/plants9020166
Received: 11 January 2020 / Revised: 24 January 2020 / Accepted: 24 January 2020 / Published: 30 January 2020
(This article belongs to the Special Issue The Plant Two-Component System)
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. View Full-Text
Keywords: cytokinin; type-B ARR; ChIP-seq; phytohormone; two-component system; multistep phosphorelay; crosstalk; transcription cytokinin; type-B ARR; ChIP-seq; phytohormone; two-component system; multistep phosphorelay; crosstalk; transcription
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MDPI and ACS Style

Zubo, Y.O.; Schaller, G.E. Role of the Cytokinin-Activated Type-B Response Regulators in Hormone Crosstalk. Plants 2020, 9, 166. https://doi.org/10.3390/plants9020166

AMA Style

Zubo YO, Schaller GE. Role of the Cytokinin-Activated Type-B Response Regulators in Hormone Crosstalk. Plants. 2020; 9(2):166. https://doi.org/10.3390/plants9020166

Chicago/Turabian Style

Zubo, Yan O., and G. Eric Schaller. 2020. "Role of the Cytokinin-Activated Type-B Response Regulators in Hormone Crosstalk" Plants 9, no. 2: 166. https://doi.org/10.3390/plants9020166

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