{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,30]],"date-time":"2026-10-30T22:45:11Z","timestamp":1793400311465,"version":"4.5.0"},"reference-count":54,"publisher":"Wiley","issue":"6","license":[{"start":{"date-parts":[[2004,3,31]],"date-time":"2004-03-31T00:00:00Z","timestamp":1080691200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Molecular Ecology"],"published-print":{"date-parts":[[2004,6]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>The role of salicylic acid (SA) in plant responses to pathogens has been well documented, but its direct and indirect effects on plant responses to insects are not so well understood. We examined the effects of SA, alone and in combination with jasmonic acid (JA), on the performance of the generalist herbivore, <jats:italic>Spodoptera exigua<\/jats:italic>, in wild\u2010type and mutant <jats:italic>Arabidopsis thaliana<\/jats:italic> genotypes that varied genetically in their ability to mount SA\u2010 and JA\u2010mediated defence responses. In one experiment, growth of <jats:italic>S. exigua<\/jats:italic> larvae was highest on the Wassilewskija wild\u2010type, intermediate on the Columbia wild\u2010type and the JA\u2010deficient <jats:italic>fad<\/jats:italic> mutant, and lowest on the <jats:italic>nim1\u20101<\/jats:italic> and <jats:italic>jar1\u2010<\/jats:italic>mutants, which are defective in the SA and JA pathways, respectively. Activity of guaiacol peroxidase, polyphenoloxidase, <jats:italic>n<\/jats:italic>\u2010acetylglucosaminidase, and trypsin inhibitor varied by genotype but did not correlate with insect performance. SA treatment increased growth of <jats:italic>S. exigua<\/jats:italic> larvae by \u223c35% over all genotypes, but had no discernable effect on activities of the four defence proteins. In a second experiment, growth of <jats:italic>S. exigua<\/jats:italic> was highest across treatments on the <jats:italic>cep1<\/jats:italic> mutant, a constitutive expressor of high SA levels and systemic acquired resistance, and lowest on the <jats:italic>fad<\/jats:italic> mutant, which is JA\u2010deficient. JA treatment generally increased activity of all four defence proteins, increased total glucosinolate levels and reduced insect growth by \u223c25% over all genotypes. SA generally inhibited expression of JA\u2010induced resistance to <jats:italic>S. exigua<\/jats:italic> when both hormones were applied simultaneously. Across genotypes and treatments, larval mass was negatively correlated with the activity of trypsin inhibitor and polyphenoloxidase and with total glucosinolate levels, and insect damage was negatively correlated with the activity of polyphenoloxidase. SA had little effect on the induction of defence protein activity by JA. However, SA attenuated the induction of glucosinolates by JA and therefore may explain better the interactive effects of SA and JA on insect performance. This study illustrates that direct and indirect cross\u2010effects of SA on resistance to <jats:italic>S. exigua<\/jats:italic> can occur in <jats:italic>A. thaliana<\/jats:italic>. Effects of SA may be mediated through effects on plant defence chemistry or other aspects of the suitability of foliage for insect feeding and growth.<\/jats:p>","DOI":"10.1111\/j.1365-294x.2004.02161.x","type":"journal-article","created":{"date-parts":[[2004,6,10]],"date-time":"2004-06-10T13:00:54Z","timestamp":1086872454000},"page":"1643-1653","source":"Crossref","is-referenced-by-count":189,"title":["Salicylic acid inhibits jasmonic acid\u2010induced resistance of <i>Arabidopsis thaliana<\/i> to <i>Spodoptera exigua<\/i>"],"prefix":"10.1111","volume":"13","author":[{"given":"D.","family":"Cipollini","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"S.","family":"Enright","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"M. 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