Olive fruits infested with olive fly larvae respond with an ethylene burst and the emission of specific volatiles

Journal of Integrative Plant Biology
Fiammetta AlagnaLuciana Baldoni

Abstract

Olive fly (Bactrocera oleae R.) is the most harmful insect pest of olive (Olea europaea L.) which strongly affects fruits and oil production. Despite the expanding economic importance of olive cultivation, up to now, only limited information on plant responses to B. oleae is available. Here, we demonstrate that olive fruits respond to B. oleae attack by producing changes in an array of different defensive compounds including phytohormones, volatile organic compounds (VOCs), and defense proteins. Bactrocera oleae-infested fruits induced a strong ethylene burst and transcript levels of several putative ethylene-responsive transcription factors became significantly upregulated. Moreover, infested fruits induced significant changes in the levels of 12-oxo-phytodienoic acid and C12 derivatives of the hydroperoxide lyase. The emission of VOCs was also changed quantitatively and qualitatively in insect-damaged fruits, indicating that B. oleae larval feeding can specifically affect the volatile blend of fruits. Finally, we show that larval infestation maintained high levels of trypsin protease inhibitors in ripe fruits, probably by affecting post-transcriptional mechanisms. Our results provide novel and important information to underst...Continue Reading

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Citations

Nov 20, 2015·New Biotechnology·Claus Wasternack, Miroslav Strnad
Mar 13, 2016·Journal of Integrative Plant Biology·Hailing Jin
Nov 30, 2018·PloS One·Ahmed AbdelfattahLeonardo Schena
May 11, 2019·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Hossein MardaniYoshiharu Fujii
May 7, 2019·Frontiers in Plant Science·Carlos De OllasVicent Arbona

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