Relationship between the Degree of Polymerization of Chitooligomers and Their Activity Affecting the Growth of Wheat Seedlings under Salt Stress

文献类型： 外文期刊

第一作者： Zhang, Xiaoqian

作者： Zhang, Xiaoqian;Li, Kecheng;Liu, Song;Xing, Ronge;Yu, Huahua;Chen, Xiaolin;Qin, Yukun;Li, Pengcheng;Zhang, Xiaoqian;Li, Kecheng;Zou, Ping

作者机构：

关键词： chitooligomers;degrees of polymerization;salt stress;photosynthesis;antioxidant enzyme activities;gene expression

期刊名称：JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY （ 影响因子：5.279； 五年影响因子：5.269 ）

ISSN：

年卷期：

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收录情况： SCI

摘要： Seven chitooligomers (COSs) with determined degrees of polymerization (DPs) (chitotetraose to chitooctaose, DP 8-10, DR 10-12) and a heterogeneous COS with various DPs were first applied to explore the relationship between: the DP of COSs and their effect on-the growth of wheat seedlings under salt stress. The results showed that COS could promote the growth of wheat seedlings under salt stress. Moreover, ehitohexaose, chitoheptaose, and chitooctaose exhibited strongeractivity compared with other COS samples, which suggested that their activity had a close relationship with the DP. After 10 days of treatment with chitohexaose, ehitoheptaose, and chitooctacise, the photosynthetic parameters were obviously improved: The soluble sugar and proline contents were improved by 26.7-53.3 and 43.6-70.2%, respectively, whereas the concentration of malondialdehyde (MDA) was reduced by 36.8-49.6%. In addition, the antioxidant enzyme activities were clearly activated. At the molecular devel, the results revealed that they could obviously induce the expression of Na+/H+ antiporter genes.

分类号： R15`S

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