Dataset Information


Transcription profiling of Arabidopsis ARR2 mutants vs wild type

ABSTRACT: Phytohormones like ethylene and cytokinin are important regulators of plant growth and development. Perception of these hormones is accomplished by families of sensor histidine kinase-type receptors. Here, we identified the response regulator ARR2 as a signaling component functioning downstream of not only cytokinin receptors but also of the ethylene receptor ETR1. Transcriptome analyses suggest that ARR2 also participates in the regulation of several other signaling pathways. Further investigations indicate that hormone-initiated multi-step phosphorelais regulate the transcription factor activity of ARR2. The ETR1-dependent mechanism thereby creates a CTR1-independent ethylene signal transfer. From our data we propose that a two-component signaling network exists in higher plants that is predominantly responsible for fine-tuning and integration of a large number of signal transduction pathways.

ORGANISM(S): Arabidopsis thaliana

SUBMITTER: Uta Sweere 

PROVIDER: E-MEXP-125 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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The response regulator 2 mediates ethylene signalling and hormone signal integration in Arabidopsis.

Hass Claudia C   Lohrmann Jens J   Albrecht Verónica V   Sweere Uta U   Hummel Florian F   Yoo Sang Dong SD   Hwang Ildoo I   Zhu Tong T   Schäfer Eberhard E   Kudla Jörg J   Harter Klaus K  

The EMBO journal 20040729 16

Hormones are important regulators of plant growth and development. In Arabidopsis, perception of the phytohormones ethylene and cytokinin is accomplished by a family of sensor histidine kinases including ethylene-resistant (ETR) 1 and cytokinin-response (CRE) 1. We identified the Arabidopsis response regulator 2 (ARR2) as a signalling component functioning downstream of ETR1 in ethylene signal transduction. Analyses of loss-of-function and ARR2-overexpressing lines as well as functional assays i  ...[more]

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