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. 2020 Mar 6;21(5):1807. doi: 10.3390/ijms21051807

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© 2020 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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A schematic of auxin-mediated root growth in rice. Auxin response regulates root growth in rice, and the auxin response is controlled by auxin-related genes such as OsYUCCAs for auxin biosynthesis, OsPINs for transport, and OsARFs for signaling. OsMADS25 is not a direct component of the auxin signaling pathway, but regulates root growth by controlling the expression of OsIAAs. Cell wall development also regulates root growth in rice, and it is likely that auxin is involved in this process. Dashed arrow indicates hypothetical regulation.