文献类型： 外文期刊
作者：
Zhang, Yinfei
1
;
Wang, Yu
1
;
Ding, Zhaotang
1
;
Wang, Hui
2
;
Song, Lubin
3
;
Jia, Sisi
1
;
Ma, Dexin
1
;
作者机构： 1.Qingdao Agr Univ, Tea Res Inst, Qingdao 266109, Peoples R China
2.Rizhao Tea Res Inst Shandong, Rizhao 276800, Peoples R China
3.Shandong Acad Agr Sci, Inst Pomol, Tai An 271000, Shandong, Peoples R China
关键词： Camellia sinensis (L) O. Kuntze;Ion homeostasis;Metabolome;Zn stress
期刊名称：PLANT PHYSIOLOGY AND BIOCHEMISTRY （ 影响因子：4.27； 五年影响因子：4.816 ）
ISSN：
年卷期：
页码：
收录情况： SCI
摘要： The research of physiological responses to Zn stress in plants has been extensively studied. However, the ionomics and metabolomics responses of plants to Zn stress remain largely unknown. In present study, the nutrient elements were identified involved in ion homeostasis and metabolomics changes related to Zn deficiency or excess in tea plants. Nutrient element analysis demonstrated that the concentrations of Zn affected the ion-uptake in roots and the nutrient element transportation to leaves, leading to the different distribution of P, S, Al, Ca, Fe and Cu in the tea leaves or roots. Metabolomics analysis revealed that Zn deficiency or excess differentially influenced the metabolic pathways in the tea leaves. More specifically, Zn deficiency affected the metabolism of carbohydrates, and Zn excess affected flavonoids metabolism. Additionally, the results showed that both Zn deficiency and Zn excess led to reduced nicotinamide levels, which speeded up NAD(+) degradation and thus reduced energy metabolism. Furthermore, element-metabolite correlation analysis illustrated that Zn contents in the tea leaves were positively correlated with organic acids, nitrogenous metabolites and some carbohydrate metabolites, and negatively correlated with the metabolites involved in secondary metabolism and some other carbohydrate metabolites. Meanwhile, metabolite-metabolite correlation analysis demonstrated that organic acids, sugars, amino acids and flavonoids played dominant roles in the regulation of the tea leaf metabolism under Zn stress. Therefore, the conclusion should be drawn that the tea plants responded to Zn stress by coordinating ion-uptake and regulation of metabolism of carbohydrates, nitrogenous metabolites, and flavonoids. (C) 2016 Elsevier Masson SAS. All rights reserved.
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