Benefits and potential trade-offs associated with yeast-like symbionts during virulence adaptation in a phloem-feeding planthopper

Horgan, FG; Ferrater, JB

Benefits and potential trade-offs associated with yeast-like symbionts during virulence adaptation in a phloem-feeding planthopper

Horgan, FG

Ferrater, JB

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Publication Type:: Journal Article
Citation:: Entomologia Experimentalis et Applicata, 2017, 163 (1), pp. 112 - 125
Issue Date:: 2017-04-01

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Field	Value	Language
dc.contributor.author	Horgan, FG https://orcid.org/0000-0003-3796-667X	en_US
dc.contributor.author	Ferrater, JB	en_US
dc.date.issued	2017-04-01	en_US
dc.identifier.citation	Entomologia Experimentalis et Applicata, 2017, 163 (1), pp. 112 - 125	en_US
dc.identifier.issn	0013-8703	en_US
dc.identifier.uri	http://hdl.handle.net/10453/115220
dc.description.abstract	© 2017 The Netherlands Entomological Society Insect herbivores form symbioses with a diversity of prokaryotic and eukaryotic microorganisms. A role for endosymbionts during host feeding on nutrient-poor diets – including phloem – is now supported by a large body of evidence. Furthermore, symbiont-herbivore associations have been implicated in feeding preferences by host races (mainly aphids) on multiple plant species. However, the role of symbionts in mediating herbivore preferences between varieties of the same plant species has received little research attention despite the implications for virulence adaptation to resistant crops. This study investigates the role of yeast-like symbionts (YLS) in virulence adaptation and host plant switching among populations of the brown planthopper, Nilaparvata lugens (Stål) (Hemiptera: Delphacidae), that were selected on various rice [Oryza sativa L. (Poaceae)] lines differing in their resistance against herbivores. Planthopper fitness (nymph weight) declined where YLS densities were depleted through heat treatment. However, compared to normal symbiotic planthoppers, the depletion of symbionts did not generally change the relative fitness of planthoppers (each ‘adapted’ to a single natal host) when switched to feed on a range of rice lines (exposed hosts). In some cases, this occurred despite differences in YLS density responses to the various hosts. Furthermore, we detected no fitness costs associated with YLS in adapted populations. Therefore, the results of this study suggest that, whereas YLS are essential for planthopper nutrition, changes in YLS density play little role during virulence adaptation and host plant switching by the brown planthopper.	en_US
dc.relation.ispartof	Entomologia Experimentalis et Applicata	en_US
dc.relation.isbasedon	10.1111/eea.12556	en_US
dc.subject.classification	Entomology	en_US
dc.title	Benefits and potential trade-offs associated with yeast-like symbionts during virulence adaptation in a phloem-feeding planthopper	en_US
dc.type	Journal Article
utslib.citation.volume	1	en_US
utslib.citation.volume	163	en_US
utslib.for	0501 Ecological Applications	en_US
utslib.for	0608 Zoology	en_US
utslib.for	0701 Agriculture, Land and Farm Management	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
pubs.organisational-group	/University of Technology Sydney/Faculty of Science/School of Life Sciences
utslib.copyright.status	closed_access
pubs.issue	1	en_US
pubs.publication-status	Published	en_US
pubs.volume	163	en_US

Abstract:

© 2017 The Netherlands Entomological Society Insect herbivores form symbioses with a diversity of prokaryotic and eukaryotic microorganisms. A role for endosymbionts during host feeding on nutrient-poor diets – including phloem – is now supported by a large body of evidence. Furthermore, symbiont-herbivore associations have been implicated in feeding preferences by host races (mainly aphids) on multiple plant species. However, the role of symbionts in mediating herbivore preferences between varieties of the same plant species has received little research attention despite the implications for virulence adaptation to resistant crops. This study investigates the role of yeast-like symbionts (YLS) in virulence adaptation and host plant switching among populations of the brown planthopper, Nilaparvata lugens (Stål) (Hemiptera: Delphacidae), that were selected on various rice [Oryza sativa L. (Poaceae)] lines differing in their resistance against herbivores. Planthopper fitness (nymph weight) declined where YLS densities were depleted through heat treatment. However, compared to normal symbiotic planthoppers, the depletion of symbionts did not generally change the relative fitness of planthoppers (each ‘adapted’ to a single natal host) when switched to feed on a range of rice lines (exposed hosts). In some cases, this occurred despite differences in YLS density responses to the various hosts. Furthermore, we detected no fitness costs associated with YLS in adapted populations. Therefore, the results of this study suggest that, whereas YLS are essential for planthopper nutrition, changes in YLS density play little role during virulence adaptation and host plant switching by the brown planthopper.

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http://hdl.handle.net/10453/115220