期刊
PLANT AND CELL PHYSIOLOGY
卷 51, 期 5, 页码 767-775出版社
OXFORD UNIV PRESS
DOI: 10.1093/pcp/pcq036
关键词
Aquaporin; Salt tolerance; TaNIP; Wheat
资金
- National Natural Science Fund [30971766]
- Hebei Provincial Natural Science Fund [C2009000278]
High soil salinity is a major abiotic stress in plant agriculture worldwide. Here, we report the characterization of a novel aquaporin gene TaNIP (Triticum asetivum L. nodulin 26-like intrinsic protein), which was involved in salt tolerance pathways in plants. TaNIP was identified and cloned through the gene chip expression analysis of a salt-tolerant wheat mutant RH8706-49 under salt stress. Quantitative reverse transcriptionPCR (Q-RTPCR) was used to detect TaNIP expression under salt, drought, cold and ABA treatment. The overexpression of TaNIP in transgenic Arabidopsis produced higher salt tolerance than wild-type plants. Localization analysis showed that TaNIP proteins tagged with green fluorescent protein (GFP) were localized to the cell plasma membrane. Under salt stress treatment, TaNIP-overexpressing Arabidopsis accumulated higher K, Ca-2 and proline contents and lower Na level than the wild-type plants. The overexpression of TaNIP in transgenic Arabidopsis also up-regulated the expression of a number of stress-associated genes. Our results suggest that TaNIP plays an important role in salt tolerance in Arabidopsis and can also enhance plants tolerance to other abiotic stresses.
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