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Related Experiment Video

Updated: Mar 7, 2026

Measuring Gene Expression in Bombarded Barley Aleurone Layers with Increased Throughput

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Published on: March 30, 2018

RD26 mediates crosstalk between drought and brassinosteroid signalling pathways.

Huaxun Ye¹, Sanzhen Liu^2,3, Buyun Tang¹

¹Department of Genetics, Development and Cell Biology, Iowa State University, Ames, Iowa 50011, USA.

Nature Communications

|February 25, 2017

Summary

Brassinosteroids (BRs) coordinate plant growth and drought tolerance. Transcription factor RD26 mediates crosstalk between BR signaling and drought response, inhibiting BR-regulated growth and function.

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Area of Science:

Plant Biology
Molecular Biology
Genetics

Background:

Brassinosteroids (BRs) are key plant hormones regulating growth and stress responses.
The BES1/BZR1 transcription factor family mediates BR signaling, controlling numerous downstream genes.
The precise mechanisms linking BR signaling to drought response are not fully understood.

Purpose of the Study:

To elucidate the interaction between brassinosteroid (BR) signaling and drought response pathways.
To identify key molecular players mediating crosstalk between BR and drought signaling.

Main Methods:

Gene expression analysis (global studies).
Protein-protein interaction assays.
Analysis of transcription factor activity.

Main Results:

Transcription factor RD26 acts as a mediator between drought and BR signaling.
Overexpression of RD26 inhibits BR-regulated plant growth.
RD26 antagonizes BES1 transcriptional activity and represses a subset of BR-regulated genes.
BR signaling can repress RD26 expression and inhibit drought responses.

Conclusions:

RD26 plays a crucial role in the antagonistic interaction between BR signaling and drought response.
A novel mechanism coordinating plant growth and drought tolerance via RD26 and BR signaling is revealed.