Plant Physiol. PAM Fluorometers & Gas Exchange
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH
QUICK SEARCH:   [advanced]


     

Plant Physiology Preview
Published on June 7, 2007; 10.1104/pp.107.099895

OPEN ACCESS ARTICLE
This Article
Free via Open Access: OA
Right arrow Full Text (Plant Physiology Preview (PDF))
Right arrowOA All Versions of this Article:
145/3/814    most recent
pp.107.099895v1
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Kant, P.
Right arrow Articles by Barak, S.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Kant, P.
Right arrow Articles by Barak, S.
Agricola
Right arrow Articles by Kant, P.
Right arrow Articles by Barak, S.

Received March 22, 2007
Accepted May 30, 2007

STRS1 and STRS2, Two DEAD-Box RNA Helicases that Attenuate Arabidopsis Responses to Multiple Abiotic Stresses

Pragya Kant , Surya Kant , Michal Gordon , Ruth Shaked , and Simon Barak *

Albert Katz Department of Dryland Biotechnologies, Jacob Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, Midreshet Ben-Gurion 84990, Israel

* Corresponding author; email: simon{at}bgu.ac.il.

Two genes encoding Arabidopsis DEAD-box RNA helicases were identified in a functional genomics screen as being down-regulated by multiple abiotic stresses. Mutations in either gene caused increased tolerance to salt, osmotic and heat stresses suggesting that the helicases suppress responses to abiotic stress. The genes were therefore designated STRESS RESPONSE SUPPRESSOR (STRS) 1 (At1g31970) and STRS2 (At5g08620). In the strs mutants, salt, osmotic and cold stresses induced enhanced expression of genes encoding the transcriptional activators, DREB1A/CBF3 and DREB2A and a downstream DREB target gene, RD29A. Under heat stress, the strs mutants exhibited enhanced expression of the heat shock transcription factor genes, HSF4 and HSF7 and the downstream gene HSP101. Germination of mutant seed was hyposensitive to the phytohormone abscisic acid (ABA), but mutants showed up-regulated expression of genes encoding ABA-dependent stress-responsive transcriptional activators and their downstream targets. In wild-type plants, STRS1 and STRS2 expression was rapidly down-regulated by salt, osmotic, heat but not cold stress. STRS expression was also reduced by ABA but salt stress led to reduced STRS expression in both wild-type and ABA-deficient mutant plants. Taken together, our results suggest that STRS1 and STRS2 attenuate the expression of stress-responsive transcriptional activators and function in ABA-dependent and ABA-independent abiotic stress signaling networks.




This article has been cited by other articles:


Home page
 Plant Physiol.Home page
S. Kant, Y.-M. Bi, E. Weretilnyk, S. Barak, and S. J. Rothstein
The Arabidopsis Halophytic Relative Thellungiella halophila Tolerates Nitrogen-Limiting Conditions by Maintaining Growth, Nitrogen Uptake, and Assimilation
Plant Physiology, July 1, 2008; 147(3): 1168 - 1180.
[Abstract] [Full Text] [PDF]

Home page
 J Exp BotHome page
D. Li, H. Liu, H. Zhang, X. Wang, and F. Song
OsBIRH1, a DEAD-box RNA helicase with functions in modulating defence responses against pathogen infection and oxidative stress
J. Exp. Bot., May 1, 2008; 59(8): 2133 - 2146.
[Abstract] [Full Text] [PDF]


HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH
ASPB Publications PLANT PHYSIOLOGY THE PLANT CELL
Copyright © 2007 by the American Society of Plant Biologists