Journal
CROP JOURNAL
Volume 6, Issue 2, Pages 181-190Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.cj.2017.08.005
Keywords
TaSAUR75; Drought; Salt; ROS; Wheat; Arabidopsis
Categories
Funding
- National Key Research and Development Program of China [2016YFD0100304]
- National Transgenic Key Project from the Ministry of Agriculture of China [2016ZX08002-002]
- Agricultural Science and Technology Program for Innovation Team on the Identification and Excavation of Elite Crop Germplasm, CAAS
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Small auxin-upregulated RNAs (SAURs) are genes regulated by auxin and environmental factors. In this study, we identified a SAUR gene in wheat, TaSAUR75. Under salt stress, TaSAUR75 is downregulated in wheat roots. Subcellular localization revealed that TaSAUR75 was localized in both the cytoplasm and nucleus. Overexpression of TaSAUR75 increased drought and salt tolerance in Arabidopsis. Transgenic lines showed higher root length and survival rate and higher expression of some stress-responsive genes than control plants under salt and drought stress. Less H2O2 accumulated in transgenic lines than in control plants under drought stress. Our findings reveal a positive regulatory role of the auxin-responsive gene TaSAUR75 in plant responses to drought and salt stress and provide a candidate gene for improvement of abiotic stress tolerance in crop breeding. (C) 2017 Crop Science Society of China and Institute of Crop Science, CAAS. Production and hosting by Elsevier B.V. on behalf of KeAi Communications Co., Ltd.
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