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. 2026 Jul 28;17:1887737. doi: 10.3389/fpls.2026.1887737

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Copyright © 2026 Zhou, Li, Zhu, Wang, Guo, Liu 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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Three grouped bar graphs labeled A, B, and C display CAT, POD, and SOD enzyme activities in plants under increasing salt stress and varying PEG-6000 treatments, highlighting significant variations among conditions. — Effects of combined drought and salinity stress on the activities of catalase, peroxidase and superoxide dismutase in alfalfa. (A) CAT activity, (B) POD activity, (C) SOD activity. D, drought stress; S, salinity stress; D × S, interaction between drought stress and salinity stress. Different lowercase letters above bars indicate significant differences among treatments at P < 0.05. *, **, and *** indicate significance at P < 0.05, P < 0.01, and P < 0.001, respectively; ns indicates no significant difference.