Isolation and characterization of an arabidopsis drought-resistant mutant vrm1

Isolation and characterization of an arabidopsis drought-resistant mutant vrm1 Drought is the major abiotic stress restricting plant growth. To gain insight into the regulatory mechanisms for drought stress tolerance, we performed a genetic screen for identifying Arabidopsis (Arabidopsis thaliana) drought-resistant mutants. A drought-resistant mutant vrm1 was isolated because of its increased root growth and fresh weight under drought stress. Compared with the wild type (WT), the vrm1 mutant was more resistant to drought stress. The vrm1 plants showed the higher levels of free proline and soluble sugars and the lower relative stomatal conductance as well as the lower water loss rate than the WT under drought stress. Moreover, the higher transcription levels of drought stress-responsive genes NCED3, RD22, RD29A, and COR15A were detected in vrm1 plants subjected to drought and mannitol stresses as compared with WT plants. These results suggest that increased drought resistance of the vrm1 mutant was associated with, at least in part, the higher expression of these drought stress-responsive genes. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Russian Journal of Plant Physiology Springer Journals

Isolation and characterization of an arabidopsis drought-resistant mutant vrm1

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Publisher
Springer Journals
Copyright
Copyright © 2013 by Pleiades Publishing, Ltd.
Subject
Life Sciences; Plant Physiology; Plant Sciences
ISSN
1021-4437
eISSN
1608-3407
D.O.I.
10.1134/S1021443713060046
Publisher site
See Article on Publisher Site

Abstract

Drought is the major abiotic stress restricting plant growth. To gain insight into the regulatory mechanisms for drought stress tolerance, we performed a genetic screen for identifying Arabidopsis (Arabidopsis thaliana) drought-resistant mutants. A drought-resistant mutant vrm1 was isolated because of its increased root growth and fresh weight under drought stress. Compared with the wild type (WT), the vrm1 mutant was more resistant to drought stress. The vrm1 plants showed the higher levels of free proline and soluble sugars and the lower relative stomatal conductance as well as the lower water loss rate than the WT under drought stress. Moreover, the higher transcription levels of drought stress-responsive genes NCED3, RD22, RD29A, and COR15A were detected in vrm1 plants subjected to drought and mannitol stresses as compared with WT plants. These results suggest that increased drought resistance of the vrm1 mutant was associated with, at least in part, the higher expression of these drought stress-responsive genes.

Journal

Russian Journal of Plant PhysiologySpringer Journals

Published: Oct 13, 2013

References

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