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. 2020 Oct 22;11:533046. doi: 10.3389/fpls.2020.533046

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Copyright © 2020 Wang, Liu, Zhang, Zhao and Ren.

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 heat stress on the morphology of young ears of two varieties of summer maize with a different capacity for heat tolerance. T and S represent the heat-tolerant variety and the heat-sensitive variety, respectively. L represents the natural environment and H represent the heat-stressed environment. V9, V12, and VT represent the 9^th leaf, 12^th leaf, and tasseling stages. The length of the ruler is 1 cm.