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. 2019 Feb 8;10:55. doi: 10.3389/fgene.2019.00055

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Copyright © 2019 Li, Yang, Wang, Liu, Huo, Zhang, Liu, Zhu, Hu, Lin 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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Predicted pathways for regulating rice drought memory response. The ABA/SnRK2-mediated pathway actives downstream genes in response to the first drought stress. ABA might act as memory factor to regulate genes related to photosynthesis, proline synthesis and ROS repair, result in accumulation of protective substances (such as proline) to respond to subsequent drought stress. During this process, TFs might also take part in regulating proline synthesis to accumulate proline. Broken lines indicate possible, but not confirmed, routes. Full lines represent the routes have been demonstrated in previous studies. Heatmap of memory transcripts involved in these pathways are shown.