Abstract
The small heat shock proteins (sHSPs) are most prevalent in plants and are believed to play an important role in stress tolerance. Our microarray and qRT-PCR analyses of rice plants showed that the gene Oryza sativa Multi-Stress-Responsive 4 (OsMSR-4) is induced by heat, drought, and cold in different tissues at various developmental stages. OsMSR-4 encodes a Class III sHSP. Its expression in Arabidopsis thaliana conferred enhanced tolerance to drought accompanied by altered expression of other stress-related genes. Under drought conditions, levels of free proline were higher in transgenic plants than in the wild-type. The transgenics also showed decreased sensitivity to abscisic acid (ABA) during the seed germination and post-germination stages. Our study provides evidence that OsMSR4 has a key role in regulating plant responses to ABA and drought.
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Abbreviations
- ABA:
-
Abscisic acid
- ACD:
-
“a-crystallin” domain
- MS:
-
Murashige and Skoog
- NLS:
-
Nuclear localization signal
- ORF:
-
Open reading frame
- OsMSR-4 :
-
Oryza sativa Multi-Stress-Responsive Gene 4
- qRT-PCR:
-
Quantitative real-time PCR
- RT-PCR:
-
Reverse-transcription PCR
- sHSPs:
-
Small heat shock proteins
- WT:
-
Wild type
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Acknowledgments
This research was supported by the Science and Technology Key Project of Hu Nan Province, P. R. China (S2011F2022).
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Yin, X., Huang, L., Zhang, X. et al. Expression of rice gene OsMSR4 confers decreased ABA sensitivity and improved drought tolerance in Arabidopsis thaliana . Plant Growth Regul 75, 549–556 (2015). https://doi.org/10.1007/s10725-014-0020-z
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DOI: https://doi.org/10.1007/s10725-014-0020-z