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. 2021 Jun 7;12:658609. doi: 10.3389/fpls.2021.658609

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Copyright © 2021 Wang, Dai, Xu, Dai, Chen, Zhang and Zhang.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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The activity levels of catalase (CAT; A), peroxidase (POD; B), and superoxide dismutase (SOD; C) in CK, blocker-treated, and chelator-treated tobacco plant roots under normal or low potassium levels. Transcriptional expression of NtCAT (D), NtPOD (E), and NtSOD (F) in CK, blocker-treated, and chelator-treated tobacco plant roots under normal and low potassium levels. * and ** indicate significant differences between CK and treated plants at p < 0.05 and p < 0.01, respectively, by Student’s t-test.