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. 2017 May 8;8:736. doi: 10.3389/fpls.2017.00736

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Copyright © 2017 Staswick, Rowe, Spalding and Splitt.

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) or licensor 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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Model for the action of Trp conjugates in IAA transport. Turquoise ovals represent wild type AUX1 and yellow, the tcor1-D mutant version with the Asn for Asp substitution. Transport of IAA via AUX1 is indicated by arrows. Interaction of JA-Trp, IAA-Trp or PAA-Trp with AUX1 blocks IAA transport in wild type plants. In the mutant either JA-Trp doesn’t interact or does so in a way that does not interfere with IAA polar movement. The other conjugates are still effective at promoting an agravitropic root response, as indicated by the seedling representations.