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. 2018 Oct 16;9:1520. doi: 10.3389/fpls.2018.01520

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Copyright © 2018 Zhang, Yue, Zheng, Gautam, He and Li.

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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Maize seedlings under heat treatment for 3 days were transferred to the control temperature condition for recovery, and the lateral root growth initiation was restored, while the level of epigenetic modification of ZmHO-1 and ZmGSL-1 gene promoter was restored to normal level. (A) Root section of maize seedlings at 6 days under control temperature condition and 6 days under heat treatment. (B) The alterations in H3K9ac in the upstream region of ZmHO-1 gene promoter under heat treatment group and restored group. (C) The alterations of H4K5ac in the upstream region of ZmHO-1 gene promoter in heat treatment group and restored group. (D) Changes in H3K9ac in the upstream region of ZmGSL-1 gene promoter under heat treatment group and restored group. (E) Alterations in H4K5ac upstream of ZmGSL-1 gene promoter under heat treatment group and restored group. All experiments were repeated three times. Asterisk (^∗) indicated that the relative increase in H3K9ac or H4K5ac under heat treatment is significantly different from that of the control group (t-test, p < 0.01).