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A strain of the bacterial symbiont Regiella insecticola protects aphids against parasitoids


Vorburger, C; Gehrer, L; Rodriguez, P (2010). A strain of the bacterial symbiont Regiella insecticola protects aphids against parasitoids. Biology Letters, 6(1):109-111.

Abstract

Aphids commonly harbour facultative bacterial
endosymbionts and may benefit from their
presence through increased resistance to parasitoids.
This has been demonstrated for
Hamiltonella defensa and Serratia symbiotica,
while a third common endosymbiont, Regiella
insecticola, did not provide such protection.
However, this symbiont was recently detected
in a highly resistant clone of the peach-potato
aphid, Myzus persicae, from Australia. To test
if resistance was indeed conferred by the endosymbiont,
we eliminated it from this clone with
antibiotics, and we transferred it to two other
clones of the same and one clone of a different
aphid species (Aphis fabae). Exposing these
lines to the parasitoid Aphidius colemani
showed clearly that unlike other strains of this
bacterium, this specific isolate of R. insecticola
provides strong protection against parasitic
wasps, suggesting that the ability to protect
their host against natural enemies may evolve
readily in multiple species of endosymbiotic
bacteria.

Aphids commonly harbour facultative bacterial
endosymbionts and may benefit from their
presence through increased resistance to parasitoids.
This has been demonstrated for
Hamiltonella defensa and Serratia symbiotica,
while a third common endosymbiont, Regiella
insecticola, did not provide such protection.
However, this symbiont was recently detected
in a highly resistant clone of the peach-potato
aphid, Myzus persicae, from Australia. To test
if resistance was indeed conferred by the endosymbiont,
we eliminated it from this clone with
antibiotics, and we transferred it to two other
clones of the same and one clone of a different
aphid species (Aphis fabae). Exposing these
lines to the parasitoid Aphidius colemani
showed clearly that unlike other strains of this
bacterium, this specific isolate of R. insecticola
provides strong protection against parasitic
wasps, suggesting that the ability to protect
their host against natural enemies may evolve
readily in multiple species of endosymbiotic
bacteria.

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69 citations in Web of Science®
72 citations in Scopus®
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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Institute of Evolutionary Biology and Environmental Studies
Dewey Decimal Classification:570 Life sciences; biology
590 Animals (Zoology)
Uncontrolled Keywords:Aphis fabae; endosymbiont; Myzus persicae; parasitoid; Regiella insecticola; resistance
Language:English
Date:2010
Deposited On:24 Jan 2010 11:30
Last Modified:05 Apr 2016 13:45
Publisher:The Royal Society
ISSN:1744-9561
Publisher DOI:10.1098/rsbl.2009.0642
PubMed ID:19776066
Permanent URL: http://doi.org/10.5167/uzh-27606

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