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| Content Provider | Springer Nature Link |
|---|---|
| Author | Maag, Daniel Kandula, Diwakar R. W. Müller, Caroline Mendoza Mendoza, Artemio Wratten, Stephen D. Stewart, Alison Rostás, Michael |
| Copyright Year | 2013 |
| Abstract | Several species of the fungus Trichoderma can promote plant health and are widely used as commercial biopesticides. Beneficial effects of this fungus are attributed to various mechanisms such as mycoparasitism, plant-growth promotion, increased stress tolerance and elicitation of induced systemic resistance against pathogens via jasmonic acid/ethylene-dependent pathways. Despite such well-established effects on pathogens, surprisingly little is known about the influence of Trichoderma on plant defences against herbivorous insects. This study investigated whether soil-supplementation of the established biocontrol agent Trichoderma atroviride LU132 affected the performance of oilseed rape (Brassica napus) and the development of Plutella xylostella caterpillars. Furthermore, induction and priming of defence-related phytohormones, genes and secondary metabolites by fungus and herbivore were assessed. Plants colonized by T. atroviride LU132 had significantly larger root and shoot biomass than controls. No effects of fungal inoculation were found on herbivore development. Leaf feeding of the herbivore induced higher jasmonic acid levels, but this was not influenced by fungal treatment. Similarly, the defence-related genes MYC2 and TPI were induced by herbivory but not primed or induced by T. atroviride. Expression of the gene PDF1.2 was repressed by herbivore feeding while no effects on the gene ACO and glucosinolates were observed. We conclude that T. atroviride LU132 has positive effects on the growth of oilseed but it does not enhance above-ground insect defences. |
| Starting Page | 241 |
| Ending Page | 252 |
| Page Count | 12 |
| File Format | |
| ISSN | 13866141 |
| Journal | BioControl |
| Volume Number | 59 |
| Issue Number | 2 |
| e-ISSN | 15738248 |
| Language | English |
| Publisher | Springer Netherlands |
| Publisher Date | 2013-12-05 |
| Publisher Place | Dordrecht |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Brassica napus Diamondback moth Induced defence Herbivory Jasmonic acid Plant defence Priming Induced systemic resistance Entomology Plant Pathology Agriculture Animal Ecology Animal Biochemistry Behavioural Sciences |
| Content Type | Text |
| Resource Type | Article |
| Subject | Insect Science Agronomy and Crop Science |
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