A dehydration‐induced NAC protein, RD26, is involved in a novel ABA‐dependent stress‐signaling pathway

A dehydration‐induced NAC protein, RD26, is involved in a novel ABA‐dependent... Summary Arabidopsis thaliana RD26 cDNA, isolated from dehydrated plants, encodes a NAC protein. Expression of the RD26 gene was induced not only by drought but also by abscisic acid (ABA) and high salinity. The RD26 protein is localized in the nucleus and its C terminal has transcriptional activity. Transgenic plants overexpressing RD26 were highly sensitive to ABA, while RD26‐repressed plants were insensitive. The results of microarray analysis showed that ABA‐ and stress‐inducible genes are upregulated in the RD26‐overexpressed plants and repressed in the RD26‐repressed plants. Furthermore, RD26 activated a promoter of its target gene in Arabidopsis protoplasts. These results indicate that RD26 functions as a transcriptional activator in ABA‐inducible gene expression under abiotic stress in plants. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png The Plant Journal Wiley

A dehydration‐induced NAC protein, RD26, is involved in a novel ABA‐dependent stress‐signaling pathway

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Publisher
Wiley
Copyright
Copyright © 2004 Wiley Subscription Services, Inc., A Wiley Company
ISSN
0960-7412
eISSN
1365-313X
D.O.I.
10.1111/j.1365-313X.2004.02171.x
Publisher site
See Article on Publisher Site

Abstract

Summary Arabidopsis thaliana RD26 cDNA, isolated from dehydrated plants, encodes a NAC protein. Expression of the RD26 gene was induced not only by drought but also by abscisic acid (ABA) and high salinity. The RD26 protein is localized in the nucleus and its C terminal has transcriptional activity. Transgenic plants overexpressing RD26 were highly sensitive to ABA, while RD26‐repressed plants were insensitive. The results of microarray analysis showed that ABA‐ and stress‐inducible genes are upregulated in the RD26‐overexpressed plants and repressed in the RD26‐repressed plants. Furthermore, RD26 activated a promoter of its target gene in Arabidopsis protoplasts. These results indicate that RD26 functions as a transcriptional activator in ABA‐inducible gene expression under abiotic stress in plants.

Journal

The Plant JournalWiley

Published: Sep 1, 2004

References

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