Mycorrhizal‐mediated plant–herbivore interactions in a high CO2 world

Article

Frew, Adam and Price, Jodi N.. 2019. "Mycorrhizal‐mediated plant–herbivore interactions in a high CO2 world." Functional Ecology. 33 (8), pp. 1376-1385. https://doi.org/10.1111/1365-2435.13347
Article Title

Mycorrhizal‐mediated plant–herbivore interactions in a high CO2 world

ERA Journal ID3257
Article CategoryArticle
AuthorsFrew, Adam (Author) and Price, Jodi N. (Author)
Journal TitleFunctional Ecology
Journal Citation33 (8), pp. 1376-1385
Number of Pages10
Year2019
PublisherJohn Wiley & Sons
Place of PublicationUnited Kingdom
ISSN0269-8463
1365-2435
Digital Object Identifier (DOI)https://doi.org/10.1111/1365-2435.13347
Abstract

The symbiotic relationship between terrestrial plants and arbuscular mycorrhizal (AM) fungi is a key driver of plant nutritional and defence traits influencing insect herbivory. These tripartite interactions have been fundamental to shaping the evolution of land plants and the diversity of insect herbivores. Surprisingly, we have little understanding of how these interactions will function under elevated atmospheric CO2 concentrations (eCO2), despite the considerable implications for both natural and managed ecosystems.

Although substantial research has revealed how eCO2 alters mycorrhizal–plant interactions, or plant–herbivore interactions, there is a stark scarcity of studies which investigate how eCO2 impacts mycorrhizal‐mediated plant–insect herbivore relationships.

Here, we synthesise some of the main effects of eCO2 on the mycorrhizal symbiosis, the concomitant impacts on plant nutrient dynamics and secondary metabolism, and how eCO2‐driven changes in plant growth, biochemistry and communities impact insect herbivores.

We point out that potential mechanistic drivers of AM fungal–plant–insect herbivore relationships under eCO2 can function antagonistically and are highly context‐dependent, which poses a particular challenge. Still, we hypothesise as to the potential outcomes for AM fungal–plant–herbivore dynamics under eCO2.

We identify key research priorities to tackle the substantial gap in our understanding. If ecological theory is to effectively inform agricultural and natural management practices in the future, research needs to directly investigate how changes in global atmospheric CO2 concentrations impact the tripartite relationship between AM fungi, plants and insect herbivores.

Keywordsmycorrhizal‐mediated plants, insect herbivores, relationship
ANZSRC Field of Research 2020310899. Plant biology not elsewhere classified
310703. Microbial ecology
410102. Ecological impacts of climate change and ecological adaptation
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Byline AffiliationsCharles Sturt University
Institution of OriginUniversity of Southern Queensland
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