Different mycorrhizal fungal communities differentially affect plant phenolic-based resistance to insect herbivory

Frew, Adam and Wilson, Bree A. L. (2021) Different mycorrhizal fungal communities differentially affect plant phenolic-based resistance to insect herbivory. Rhizosphere, 19:100365. pp. 1-4.


Arbuscular mycorrhizal (AM) fungi are ubiquitous symbionts of most terrestrial plants that can augment plant defences against insect herbivores. A clearer understanding of the mechanisms underpinning community-specific effects of AM fungi on plant resistance to herbivores is needed. Here, we report how plant (Triticum aestivum) phenolic-based resistance to an insect herbivore is differentially affected by inoculation with different AM fungal communities. Plants inoculated with four AM fungal species or with a field-sourced AM fungal community had significantly greater foliar phenolics than plants inoculated with a single AM fungal species (Rhizophagus irregularis) or with no AM fungi. Correspondingly, herbivore performance (relative growth rate) was lowest when feeding on those plants with greater phenolic concentrations. Furthermore, there was a negative correlation between foliar phenolics and herbivore growth. We propose that AM fungal community assembly can drive insect herbivore performance by affecting phenolic-based resistance mechanisms.

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Faculty/School / Institute/Centre: Current - Faculty of Health, Engineering and Sciences - School of Sciences (6 Sep 2019 -)
Faculty/School / Institute/Centre: Current - Institute for Life Sciences and the Environment - Centre for Crop Health (24 Mar 2014 -)
Date Deposited: 10 May 2021 01:00
Last Modified: 16 Jul 2021 03:29
Uncontrolled Keywords: Arbuscular mycorrhizal fungi; Helicoverpa punctigera; Herbivory; Multitrophic interactions; Plant defence
Fields of Research (2008): 05 Environmental Sciences > 0501 Ecological Applications > 050199 Ecological Applications not elsewhere classified
06 Biological Sciences > 0602 Ecology > 060202 Community Ecology(excl. Invasive Species Ecology)
Fields of Research (2020): 31 BIOLOGICAL SCIENCES > 3103 Ecology > 310399 Ecology not elsewhere classified
31 BIOLOGICAL SCIENCES > 3103 Ecology > 310302 Community ecology (excl. invasive species ecology)
31 BIOLOGICAL SCIENCES > 3108 Plant biology > 310899 Plant biology not elsewhere classified
Socio-Economic Objectives (2008): D Environment > 96 Environment > 9604 Control of Pests, Diseases and Exotic Species > 960413 Control of Plant Pests, Diseases and Exotic Species in Farmland, Arable Cropland and Permanent Cropland Environments
Socio-Economic Objectives (2020): 18 ENVIRONMENTAL MANAGEMENT > 1806 Terrestrial systems and management > 180602 Control of pests, diseases and exotic species in terrestrial environments
Identification Number or DOI: https://doi.org/10.1016/j.rhisph.2021.100365
URI: http://eprints.usq.edu.au/id/eprint/41944

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