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Effects of exogenous alpha-oxoglutarate on proline accumulation, ammonium assimilation and photosynthesis of soybean seedling (Glycine max(L.) Merr.) exposed to cold stress

文献类型： 外文期刊

作者： Gai, Zhijia 1 ; Liu, Lei 3 ; Zhang, Jingtao 2 ; Liu, Jingqi 2 ; Cai, Lijun 2 ;

作者机构： 1.Heilongjiang Acad Agr Sci Postdoctoral Programme, Xuefu Rd 368, Harbin 150086, Heilongjiang, Peoples R China

2.Heilongjiang Acad Agr Sci, Jiamusi Branch, Anqing St 531, Jiamusi 154007, Heilongjiang, Peoples R China

3.Northeast Agr Univ, Coll Agron, Changjiang Rd 600, Harbin 150038, Heilongjiang, Peoples R China

期刊名称：SCIENTIFIC REPORTS （ 影响因子：4.379； 五年影响因子：5.133 ）

ISSN： 2045-2322

年卷期： 2020 年 10 卷 1 期

页码：

收录情况： SCI

摘要： The objective of this study was to examine the effects of exogenous a-oxoglutarate on leaf proline accumulation, ammonium assimilation and photosynthesis of soybean when exposed to cold stress. To achieve this objective, exogenous a-oxoglutarate was sprayed to potted seedlings of Henong60 and Heinong48 at 0, 2.5, 5.0 and 7.5 mmol/L, identified as A(0), A(2.5), A(5.0), and A(7.5), respectively. Leaf samples were collected after cold stress of 24 h (S1 stage) and 48 h (S2 stage). The results indicated that exogenous a-oxoglutarate significantly enhanced leaf GS activity, NADP-GDH activity, glutamate content, proline content and photosynthesis of soybean seedling exposed to cold stress at S1 and S2 stages. The ammonium content in leaf was significantly decreased by exogenous alpha-oxoglutarate at both stages. 5.0 mmol/L of exogenous a-oxoglutarate is the optimum concentration in this study. Leaf proline content for Henong60 and Heinong48 at A(5.0) was 37.53% and 17.96% higher than that at A(0) at S1 stage, respectively. Proline content for Henong60 and Heinong48 increased by 28.82% and 12.41% at A(5.0) and A(0), respectively, at S2 stage. Those results suggested that exogenous a-oxoglutarate could alleviate the adverse effects of cold stress.

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