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dc.contributor.authorGarcía-Robles, Inmaculada
dc.contributor.authorOchoa-Campuzano, Camila
dc.contributor.authorFernández Crespo, Emma
dc.contributor.authorCamañes Querol, Gemma
dc.contributor.authorMartínez Ramírez, Amparo C.
dc.contributor.authorGonzález Bosch, Carmen
dc.contributor.authorGarcía Agustín, Pilar
dc.contributor.authorRausell, Carolina
dc.contributor.authorReal, María Dolores
dc.description.abstractInteraction between insect herbivores and host plants can be modulated by endogenous and exogenous compounds present in the source of food and might be successfully exploited in Colorado potato beetle (CPB) pest management. Feeding tests with CPB larvae reared on three solanaceous plants (potato, eggplant and tomato) resulted in variable larval growth rates and differential susceptibility to Bacillus thuringiensis Cry3Aa toxin as a function of the host plant. An inverse correlation with toxicity was observed in Cry3Aa proteolytic patterns generated by CPB midgut brush-border membrane vesicles (BBMV) from Solanaceae-fed larvae, being the toxin most extensively proteolyzed on potato, followed by eggplant and tomato. We found that CPB cysteine proteases intestains may interact with Cry3Aa toxin and, in CPB BBMV from larvae fed all three Solanaceae, the toxin was able to compete for the hydrolysis of a papain substrate. In response to treatment with the JA-dependent plant inducer Hexanoic acid (Hx), we showed that eggplant reduced OPDA basal levels and both, potato and eggplant induced JA-Ile. CPB larvae feeding on Hx-induced plants exhibited enhanced Cry3Aa toxicity, which correlated with altered papain activity. Results indicated host-mediated effects on B. thuringiensis efficacy against CPB that can be enhanced in combination with Hx plant induction.ca_CA
dc.format.extent19 p.ca_CA
dc.relation.isPartOfInternational Journal of Molecular Sciences, 2013, 14, 6ca_CA
dc.subjectColorado potato beetleca_CA
dc.subjectBacillus thuringiensisca_CA
dc.subjectCry3Aa toxinca_CA
dc.subjectintestain proteasesca_CA
dc.subjecthexanoic acidca_CA
dc.subjectplant defenseca_CA
dc.subjectplant hormonesca_CA
dc.titleCombining Hexanoic Acid Plant Priming with Bacillus thuringiensis Insecticidal Activity against Colorado Potato Beetleca_CA

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