Insect Science (2017) 24, 1025-1033

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Mariangela Coppola, Pasquale Cascone, Maria Luisa Chiusano, Chiara Colantuono, Matteo Lorito, Francesco Pennacchio, Rosa Rao, Sheridan Lois Woo, Emilio Guerrieri and Maria Cristina Digilio (2017)
Trichoderma harzianum enhances tomato indirect defense against aphids
Insect Science 24 (6), 1025-1033
Abstract: Many fungal root symbionts of the genus Trichoderma are well-known for their beneficial effects on agronomic performance and protection against plant pathogens; moreover, they may enhance protection from insect pests, by triggering plant resistance mechanisms. Defense barriers against insects are induced by the activation of metabolic pathways involved in the production of defense-related plant compounds, either directly active against herbivore insects, or exerting an indirect effect, by increasing the attraction of herbivore natural enemies. In a model system composed of the tomato plant, the aphid Macrosiphum euphorbiae and the parasitoid Aphidius ervi, plant metabolic changes induced by Trichoderma harzianum and their effects on higher trophic levels have been assessed. T. harzianum T22 treatments induce a primed state that upon aphid attacks leads to an increased attraction of aphid parasitoids, mediated by the enhanced production of volatile organic compounds (VOCs) that are known to induce Aphidius ervi flight. Transcriptome sequencing of T22-treated plants infested by aphids showed a remarkable upregulation of genes involved in terpenoids biosynthesis and salicylic acid pathway, which are consistent with the observed flight response of A. ervi and the VOC bouquet profile underlying this behavioral response.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Sheridan L. Woo, Pasquale Cascone, Rosa Rao

Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
environment/habitat manipulation


Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.


Macrosiphum euphorbiae Tomato (Solanum lycopersicum)
Aphidius ervi (parasitoid) Macrosiphum euphorbiae Tomato (Solanum lycopersicum)
Trichoderma (genus - entomopathogens) Macrosiphum euphorbiae Tomato (Solanum lycopersicum)