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. 2021 Jul 23;12:686545. doi: 10.3389/fpls.2021.686545

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Copyright © 2021 Feng, Fu, Han, Xu, Liu, Bi and Ai.

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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Effects of MT on cold tolerance of cucumber seedlings under cold stress. (A) Seedling phenotype; (B) images of F_v/F_m, (C) Φ_PSII; (D) P_n. Three-leaf stage seedlings were foliar sprayed with MT (0, 25, 50, 75, 100, or 125 μM) for 24 h and then were exposed to 5°C for 24 h. (E) MDA content; (F) EL rate. Seedlings were foliar sprayed with MT (0, 25, 50, 75, 100, or 125 μM) for 24 h and then were exposed to 5°C for 72 h. Data are represented as mean ± SD (n = 3). Different letters indicate a significant difference between samples according to Duncan's new multiple range test (p < 0.05).