GTR1 is a jasmonic acid and jasmonoyl-l-isoleucine transporter in <i>Arabidopsis thaliana</i>

<p>Jasmonates are major plant hormones involved in wounding responses. Systemic wounding responses are induced by an electrical signal derived from damaged leaves. After the signaling, jasmonic acid (JA) and jasmonoyl-l-isoleucine (JA-Ile) are translocated from wounded to undamaged leaves, but the molecular mechanism of the transport remains unclear. Here, we found that a JA-Ile transporter, GTR1, contributed to these translocations in <i>Arabidopsis thaliana</i>. <i>GTR1</i> was expressed in and surrounding the leaf veins both of wounded and undamaged leaves. Less accumulations and translocation of JA and JA-Ile were observed in undamaged leaves of <i>gtr1</i> at 30 min after wounding. Expressions of some genes related to wound responses were induced systemically in undamaged leaves of <i>gtr1</i>. These results suggested that GTR1 would be involved in the translocation of JA and JA-Ile in plant and may be contributed to correct positioning of JA and JA-Ile to attenuate an excessive wound response in undamaged leaves.</p> <p>JA and JA-Ile translocations by GTR1 would be contributed to their correct positioning to attenuate an excessive wound response in undamaged leaves.</p>