Induced Plant Defenses Against Herbivory in Cultivated and Wild Tomato

Journal of Chemical Ecology
Sulav PaudelGary W Felton

Abstract

Crop domestication and selective breeding have altered plant defense mechanisms, influencing insect-plant interactions. A reduction in plant resistance/tolerance against herbivory is generally expected in domesticated species, however, limited efforts have been made to compare inducibility of plant defenses between wild and domesticated genotypes. In the present study, the inducibility of several plant defense mechanisms (e.g. defensive chemicals, trichomes, plant volatiles) were investigated, and the performance and preference of the herbivore Helicoverpa zea were measured in three different tomato genotypes; a) wild tomato, Solanum pimpinellifolium L. (accession LA 2093), b) cherry tomato, S. lycopersicum L. var. cerasiforme (accession Matts Wild Cherry), and c) cultivated tomato, S. lycopersicum L. var. Better Boy). Enhanced inducibility of defensive chemicals, trichomes, and plant volatiles in the cultivated tomato, and a higher level of constitutive plant resistance against herbivory in the wild genotype was observed. When comparing the responses of damaged vs. undamaged leaves, the percent reduction in larval growth was higher on damaged leaves from cultivated tomato, suggesting a higher induced resistance compared to oth...Continue Reading

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Citations

Nov 27, 2019·International Journal of Molecular Sciences·Camila C FilgueirasDenis S Willett
May 30, 2020·Environmental Science and Pollution Research International·Agnès BrossetJames D Blande
Oct 28, 2021·The New Phytologist·Alice BerhinCharles Hachez

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Methods Mentioned

BETA
scanning electron microscopy
PCA

Software Mentioned

ggbiplot
randomForest
R
Minitab
R Core Team

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