TaPUB15, a U-Box E3 ubiquitin ligase gene from wheat, enhances salt tolerance in rice

文献类型： 外文期刊

第一作者： Li, Qiaoru

作者： Li, Qiaoru;Li, Bo;Wang, Jingyi;Chang, Xiaoping;Mao, Xinguo;Jing, Ruilian

作者机构：

关键词： ion homeostasis; root architecture; salt tolerance; TaPUB15; U-Box E3

期刊名称：FOOD AND ENERGY SECURITY （ 影响因子：4.109； 五年影响因子：8.33 ）

ISSN： 2048-3694

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收录情况： SCI

摘要： Plant U-box (PUB) E3 ubiquitin ligases play essential roles in response to environmental stresses and hormone signaling, but little is known about them in wheat (Triticum aestivum L.). We characterized a U-box E3 ubiquitin ligase gene, TaPUB15, which is conserved in wheat cultivars. TaPUB15 was expressed in multiple tissues, and the expression was much higher in roots than in other tissues. Transcription of TaPUB15 was induced by salt, abscisic acid, 4 degrees C, and polyethylene glycol (PEG). Overexpression of TaPUB15-D led to improve salt tolerance in transgenic rice, along with more roots in transgenic rice. Ion flux assays showed that transgenic rice plants had improved salt tolerance and maintained low Na+/K+ ratios under salinity stress. Gene expression assays indicated that several salt stress-related genes were significantly upregulated in transgenic rice relative to the wild type. These results from transgenic rice were also verified in transgenic Arabidopsis. Our data showed that TaPUB15 plays crucial roles in enhancing salt tolerance in crop plants and served a valuable gene resource for promoting the breeding of salt-tolerant wheat in the future.

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