The CCCH-Type Zinc Finger Proteins AtSZF1 and AtSZF2 Regulate Salt Stress Responses in Arabidopsis
- 27 June 2007
- journal article
- research article
- Published by Oxford University Press (OUP) in Plant and Cell Physiology
- Vol. 48 (8), 1148-1158
- https://doi.org/10.1093/pcp/pcm088
Abstract
The molecular mechanism governing the response of plants to salinity stress, one of the most significant limiting factors for agriculture worldwide, has just started to be revealed. Here, we report AtSZF1 and AtSZF2, two closely related CCCH-type zinc finger proteins, involved in salt stress responses in Arabidopsis. The expression of AtSZF1 and AtSZF2 is quickly and transiently induced by NaCl treatment. Mutants disrupted in the expression of AtSZF1 or AtSZF2 exhibit increased expression of a group of salt stress-responsive genes in response to high salt. Significantly, the atszf1-1/atszf2-1 double mutant displays more sensitive responses to salt stress than the atszf1-1 or atszf2-1 single mutants and wild-type plants. On the other hand, transgenic plants overexpressing AtSZF1 show reduced induction of salt stress-responsive genes and are more tolerant to salt stress. We also showed that AtSZF1 is localized in the nucleus. Taken together, these results demonstrated that AtSZF1 and AtSZF2 negatively regulate the expression of salt-responsive genes and play important roles in modulating the tolerance of Arabidopsis plants to salt stress.Keywords
This publication has 49 references indexed in Scilit:
- Endogenous siRNAs Derived from a Pair of Natural cis-Antisense Transcripts Regulate Salt Tolerance in ArabidopsisCell, 2005
- Multiple modes of RNA recognition by zinc finger proteinsCurrent Opinion in Structural Biology, 2005
- Zinc finger proteins: getting a grip on RNACurrent Opinion in Structural Biology, 2005
- A DEAD Box RNA Helicase Is Essential for mRNA Export and Important for Development and Stress Responses in ArabidopsisTHE PLANT CELL ONLINE, 2004
- The tandem CCCH zinc finger protein tristetraprolin and its relevance to cytokine mRNA turnover and arthritisArthritis Research & Therapy, 2004
- Genome-Wide Insertional Mutagenesis of Arabidopsis thalianaScience, 2003
- Two RNA Binding Proteins, HEN4 and HUA1, Act in the Processing of AGAMOUS Pre-mRNA in Arabidopsis thalianaDevelopmental Cell, 2003
- PLANTCELLULAR ANDMOLECULARRESPONSES TOHIGHSALINITYAnnual Review of Plant Physiology and Plant Molecular Biology, 2000
- The Arabidopsis Abscisic Acid Response Gene ABI5 Encodes a Basic Leucine Zipper Transcription FactorTHE PLANT CELL ONLINE, 2000
- The Arabidopsis SOS2 protein kinase physically interacts with and is activated by the calcium-binding protein SOS3Proceedings of the National Academy of Sciences of the United States of America, 2000