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. 2018 Jun 13;9:805. doi: 10.3389/fpls.2018.00805

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Copyright © 2018 Fan, Ma, Huang, Abid, Jiang, Dai, Zhang, Ma, Jiang and Han.

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 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 priming and post-anthesis heat stress on the net photosynthetic rate (Pn) in leaves of Yangmai 18 (A–D) and Yannong 19 (E–H) at the end of the heat-priming and grain-filling stages from 2016 to 2017. P_S, P_B, and P_A refer to 5 days of heat priming at the stem-elongation, booting and anthesis and stages, respectively. NN refers to no heat priming + no heat stress at the grain-filling stage (control); NH refers to no heat priming + heat stress at the grain-filling stage; P_SH refers to heat priming at the stem-elongation stage + heat stress at the grain-filling stage; P_BH refers to heat priming at booting + heat stress at the grain-filling stage; P_AH refers to heat priming at anthesis + heat stress at the grain-filling stage. The data are means ± SE (n = 3). Lowercase letters refer to significant differences between the treatments (P < 0.05). Whiskers above the bars indicate the standard error.