{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,23]],"date-time":"2026-04-23T16:06:17Z","timestamp":1776960377515,"version":"3.51.4"},"reference-count":44,"publisher":"Proceedings of the National Academy of Sciences","issue":"8","content-domain":{"domain":["www.pnas.org"],"crossmark-restriction":true},"short-container-title":["Proc. Natl. Acad. Sci. U.S.A."],"published-print":{"date-parts":[[2001,4,10]]},"abstract":"<jats:p>\n                    Methyl jasmonate is a plant volatile that acts as an important\n cellular regulator mediating diverse developmental processes and\n defense responses. We have cloned the novel gene\n                    <jats:italic>JMT<\/jats:italic>\n                    encoding an\n                    <jats:italic>S<\/jats:italic>\n                    -adenosyl-\n                    <jats:sc>l<\/jats:sc>\n                    -methionine:jasmonic\n acid carboxyl methyltransferase (JMT) from\n                    <jats:italic>Arabidopsis\n thaliana<\/jats:italic>\n                    . Recombinant JMT protein expressed in\n                    <jats:italic>Escherichia coli<\/jats:italic>\n                    catalyzed the formation of methyl\n jasmonate from jasmonic acid with\n                    <jats:italic>K<\/jats:italic>\n                    <jats:sub>m<\/jats:sub>\n                    value\n of 38.5 \u03bcM.\n                    <jats:italic>JMT<\/jats:italic>\n                    RNA was not detected in young\n seedlings but was detected in rosettes, cauline leaves, and developing\n flowers. In addition, expression of the gene was induced both locally\n and systemically by wounding or methyl jasmonate treatment. This result\n suggests that\n                    <jats:italic>JMT<\/jats:italic>\n                    can perceive and respond to local and\n systemic signals generated by external stimuli, and that the signals\n may include methyl jasmonate itself. Transgenic\n                    <jats:italic>Arabidopsis<\/jats:italic>\n                    overexpressing\n                    <jats:italic>JMT<\/jats:italic>\n                    had a\n 3-fold elevated level of endogenous methyl jasmonate\n without altering jasmonic acid content. The transgenic plants exhibited\n constitutive expression of jasmonate-responsive genes, including\n                    <jats:italic>VSP<\/jats:italic>\n                    and\n                    <jats:italic>PDF1.2<\/jats:italic>\n                    . Furthermore, the\n transgenic plants showed enhanced level of resistance against the\n virulent fungus\n                    <jats:italic>Botrytis cinerea<\/jats:italic>\n                    . Thus, our data suggest\n that the jasmonic acid carboxyl methyltransferase is a key enzyme for\n jasmonate-regulated plant responses. Activation of\n                    <jats:italic>JMT<\/jats:italic>\n                    expression leads to production of methyl jasmonate that could act as an\n intracellular regulator, a diffusible intercellular signal transducer,\n and an airborne signal mediating intra- and interplant communications.\n                  <\/jats:p>","DOI":"10.1073\/pnas.081557298","type":"journal-article","created":{"date-parts":[[2002,7,26]],"date-time":"2002-07-26T10:37:36Z","timestamp":1027679856000},"page":"4788-4793","update-policy":"https:\/\/doi.org\/10.1073\/pnas.cm10313","source":"Crossref","is-referenced-by-count":628,"title":["Jasmonic acid carboxyl methyltransferase: A key enzyme for jasmonate-regulated plant responses"],"prefix":"10.1073","volume":"98","author":[{"given":"Hak Soo","family":"Seo","sequence":"first","affiliation":[{"name":"School of Agricultural Biotechnology, Seoul National University,\r Suwon 441-744, Korea; and School of Biological Sciences,\r Seoul National University, 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