Enantioselective effects of imazethapyr on the secondary metabolites and nutritional value of wheat seedlings
Enantioselective effects of imazethapyr on the secondary metabolites and nutritional value of wheat seedlings
复制标题
咪草烟对映体选择性对小麦幼苗次生代谢产物及营养价值的影响
DOI：
10.1016/j.scitotenv.2020.143759
复制
发表时间：
2021-02-25
影响因子：
9.8
通讯作者：
Wen, Yuezhong
中科院分区：
文献类型：
--
作者：
Bao, Manxin;Li, Jun;Wen, Yuezhong
The secondary metabolism of plants is key for mediating responses to environmental stress, but few studies have examined how the relationship between secondary metabolism and the stress response of plants is affected by exposure to chiral herbicides. Here, we studied the enantioselective disturbance of the chiral herbicide imazethapyr (IM) on the secondary metabolism and nutrient levels of wheat seedlings. The bioactive enantiomer R-IM significantly increased the contents of major secondary metabolites, including phenolic acids, flavonoids, and carotenoids but greatly inhibited the production of benzoxazine. The antioxidant system also responded strongly to R-IM; specifically, the activities of SOD, CAT, and GPX enzymes were all significantly induced, and the GSH content initially increased but then decreased. Furthermore, the nutrient levels of wheat seedlings were also affected; dietary fiber content decreased, while the contents of the microelements Fe, Mn, and Zn increased. In sum, this study provides new insight into the phytotoxic effects of IM and raises new questions on the role of secondary metabolites and nutrients in mediating enantioselective effects. (C) 2020 Elsevier B.V. All rights reserved.
