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植物激素——茉莉酸
.au/ento/pestweb/Query1_1.idc?ID=955595135 * Pseudomonas syringae bacterial pathogen, Alternaria brassicicola netrotrophic fungus, Pieris rapae chewing caterpillar Frankliniella occidentalis cell-content feeding thrips, Myzus perisicae phloem-feeding aphid * Some insects induce SA responses and repress JA responses Zarate, S.I., Kempema, L.A., and Walling, L.L. (2007). Silverleaf whitefly induces salicylic acid defenses and suppresses effectual jasmonic acid defenses. Plant Physiol. 143: 866-875. Silverleaf whitefly nymphs induce SA defenses which suppress JA defenses, increasing their survival - + SA-induced JA-induced JA-induced Salicylates also make plants more susceptible to necrotrophs Spoel, S.H., Johnson, J.S., and Dong, X. (2007). Regulation of tradeoffs between plant defenses against pathogens with different lifestyles. Proceedings of the National Academy of Sciences 104: 18842-18847 copyright National Academy of Sciences USA. JA PDF1.2 PR-1 SA SA tends to override JA-mediated responses The necrotrophic fungus Alternaria brassicicola reproduces better on Arabidopsis plants treated with salicylic acid (SA) NPR1 is a node through which SA and JA pathways intersect Spoel, S.H., Koornneef, A., Claessens, S.M.C., Korzelius, J.P., Van Pelt, J.A., Mueller, M.J., Buchala, A.J., Metraux, J.-P., Brown, R., Kazan, K., Van Loon, L.C., Dong, X., and Pieterse, C.M.J. (2003). NPR1 modulates cross-talk between salicylate- and jasmonate-dependent defense pathways through a novel function in the cytosol. Plant Cell 15: 760-770. NONEXPRESSOR OF PR GENES1 (NPR1) is activated by SA, and interferes with JA signaling Coronatine stimulates JA responses, suppressing SA response JA SA Coronatine-producing bacterium Defense Coronatine is an excellent mimic of JA-Ile. Production of coronatine significantly enhances the pathogenicity of bacteria that produce it Different pathogens elicit different “signal signatures” De Vos, M., Van Oosten, V.R., Van Poecke, R.M.P., Van Pelt, J.A.,
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