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Physiological and TMT-based proteomic analysis of oat early seedlings in response to alkali stress

文献类型： 外文期刊

作者： Zhao, Zhou 1 ; Liu, Jinghui 1 ; Jia, Ruizong 3 ; Bao, Sarina 4 ; Haixia 1 ; Chen, Xiaojin 1 ;

作者机构： 1.Inner Mongolia Agr Univ, Sci Innovat Team Oats, Hohhot 010019, Inner Mongolia, Peoples R China

2.Chifeng Univ, Coll Life Sci, Chifeng 024000, Inner Mongolia, Peoples R China

3.Chinese Acad Trop Agr Sci, Inst Trop Biosci & Biotechnol, State Key Biotechnol Lab Trop Crops, Haikou 571101, Hainan, Peoples R China

4.Inner Mongolia Univ, Coll Life Sci, Hohhot 010021, Inner Mongolia, Peoples R China

5.Hawaii Agr Res Ctr, Kunia, HI 96759 USA

关键词： Oat early seedlings; Alkali stress; Differentially expressed proteins (DEPs); TMT-based proteomics; High pH

期刊名称：JOURNAL OF PROTEOMICS （ 影响因子：4.044； 五年影响因子：4.02 ）

ISSN： 1874-3919

年卷期： 2019 年 193 卷

页码：

收录情况： SCI

摘要： Oats are an important cereal crop worldwide, and they also serve as a phytoremediation crop to ameliorate salinized and alkalized soils. However, the mechanism of the oat response to alkali remains unclear. Physiological and tandem mass tag (TMT)-based proteomic analyses were employed to elucidate the mechanism of the oat response to alkali stress. Physiological and phenotypic data showed that oat root growth was inhibited more severely than shoot growth after alkali stress. In total, 164 proteins were up-regulated and 241 proteins were down-regulated in roots, and 93 proteins were up-regulated and 139 proteins were down-regulated in shoots. Under high pH stress, transmembrane proton transporters were down-regulated; conversely, organic acid synthesis related enzymes were increased. Transporters of N, P, Fe, Cu and Ca in addition to N assimilation enzymes in the root were highly increased. This result revealed that higher efficiency of P, Fe, Cu and Ca transport, especially higher efficiency of N intake and assimilation, greatly promoted oat root resistance to alkali stress. Furthermore, many resistance proteins, such as late embtyogenesis abundant (LEA) mainly in shoots, GDSL esterase lipase mainly in roots, and WD40-like beta propeller repeat families, greatly accumulated to contribute to oat resistance to alkali stress. Significance: In this study, physiological and tandem mass tag (TMT)-based proteomic analyses were employed to elucidate oats early seedlings in response to alkali stress. Many difference expression proteins were found involving in oats response to alkali stress. Also, higher efficiency transport of P, Fe, Cu, Ca and N greatly promoted oat resistance to alkali stress.

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