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Molecular and chemical mechanisms involved in aphid resistance in cultivated tomato
Author(s) -
Digilio Maria Cristina,
Corrado Giandomenico,
Sasso Raffaele,
Coppola Valentina,
Iodice Luigi,
Pasquariello Marianna,
Bossi Simone,
Maffei Massimo E.,
Coppola Mariangela,
Pennacchio Francesco,
Rao Rosa,
Guerrieri Emilio
Publication year - 2010
Publication title -
new phytologist
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.742
H-Index - 244
eISSN - 1469-8137
pISSN - 0028-646X
DOI - 10.1111/j.1469-8137.2010.03314.x
Subject(s) - macrosiphum euphorbiae , aphid , biology , solanum , parasitoid , aphididae , botany , horticulture , biological pest control , homoptera , pest analysis
Summary• An integrated approach has been used to obtain an understanding of the molecular and chemical mechanisms underlying resistance to aphids in cherry‐like tomato ( Solanum lycopersicum ) landraces from the Campania region (southern Italy). The aphid–parasitoid system Macrosiphum euphorbiae – Aphidius ervi was used to describe the levels of resistance against aphids in two tomato accessions (AN5, AN7) exhibiting high yield and quality traits and lacking the tomato Mi gene. • Aphid development and reproduction, flight response by the aphid parasitoid A. ervi , gas chromatography‐mass spectrometry headspace analysis of plant volatile organic compounds and transcriptional analysis of aphid responsive genes were performed on selected tomato accessions and on a susceptible commercial variety (M82). • When compared with the cultivated variety, M82, AN5 and AN7 showed a significant reduction of M. euphorbiae fitness, the release of larger amounts of specific volatile organic compounds that are attractive to the aphid parasitoid A. ervi , a constitutively higher level of expression of plant defence genes and differential enhancement of plant indirect resistance induced by aphid feeding. • These results provide new insights on how local selection can offer the possibility of the development of innovative genetic strategies to increase tomato resistance against aphids.