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. 2021 Feb 4;11:599111. doi: 10.3389/fpls.2020.599111

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Copyright © 2021 Lu, Guan, Gu, Yang, Wang, Qi, Li and Liu.

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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Effect of DA-6 treatment on active oxygen accumulation in tomato leaves under low night temperature. (A) Histochemical staining of tomato leaves under various treatment conditions with tetranitroblue tetrazolium chloride (NBT). (B) Histochemical staining of tomato leaves under various treatment conditions with diaminobenzidine (DAB). (C) O₂^– generation rate in leaves. (D) H₂O₂ content in leaves. Data are the means of five replicates with standard errors shown by vertical bars. Differences among treatments were analyzed by the one-way ANOVA comparison test (P < 0.05). Different letters indicate significant differences among treatments. CK, the plant grown at optimal temperature (28°C/18°C); LHT, the plant grown at low night temperature (28°C/6°C); LHT + DA-6, the plant pretreated with DA-6 and grown at LHT.