Combining Hexanoic Acid Plant Priming with Bacillus thuringiensis Insecticidal Activity against Colorado Potato Beetle
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Otros documentos de la autoría: García-Robles, Inmaculada; Ochoa-Campuzano, Camila; Fernández Crespo, Emma; Camañes, Gemma; Martínez Ramírez, Amparo C.; González-Bosch, Carmen; García Agustín, Pilar; Rausell, Carolina; Real, María Dolores
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Título
Combining Hexanoic Acid Plant Priming with Bacillus thuringiensis Insecticidal Activity against Colorado Potato BeetleAutoría
Fecha de publicación
2013Editor
MDPIISSN
1422-0067Tipo de documento
info:eu-repo/semantics/articleVersión de la editorial
http://www.mdpi.com/1422-0067/14/6Palabras clave / Materias
Resumen
Interaction 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 ... [+]
Interaction 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. [-]
Publicado en
International Journal of Molecular Sciences, 2013, 14, 6Derechos de acceso
http://rightsstatements.org/vocab/CNE/1.0/
info:eu-repo/semantics/openAccess
info:eu-repo/semantics/openAccess
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