aphid-borne bacterium allied to the secondary symbionts of whitefly

Bacterial 16S rDNA amplified by PCR from the pea aphid Acyrthosiphon pisum included a sequence with > 98% similarity to secondary symbionts in the whitefly Bemisia tabaci. The 'pea aphid Bemisia-like bacterium' (PABS) and B. tabaci secondary symbionts are estimated to have diverged 17-3...

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Bibliographic Details
Published in:FEMS microbiology ecology 2001-06, Vol.36 (1), p.43-50
Main Authors: Darby, A.C, Birkle, L.M, Turner, S.L, Douglas, A.E
Format: Article
Language:English
Subjects:
16S rDNA
Acyrthosiphon pisum
Aleyrodidae
Animal, plant and microbial ecology
Aphid
Aphididae
Bacteria
Bacteriology
Bemisia tabaci
Biological and medical sciences
digestive system
Ecology
Fundamental and applied biological sciences. Psychology
Genetics
Horizontal transfer
Horizontal transmission
Hybridization
in situ hybridization
Insects
Microbial diversity
Microbial ecology
Microbiology
Normal microflora of man and animals. Rumen
Ovaries
polymerase chain reaction
ribosomal DNA
rRNA 16S
Symbionts
Symbiosis
Vertical transmission
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Summary:Bacterial 16S rDNA amplified by PCR from the pea aphid Acyrthosiphon pisum included a sequence with > 98% similarity to secondary symbionts in the whitefly Bemisia tabaci. The 'pea aphid Bemisia-like bacterium' (PABS) and B. tabaci secondary symbionts are estimated to have diverged 17-34 million years ago, a time considerably more recent than the common ancestor of aphids and whitefly and suggestive of horizontal transmission of this bacterial lineage. PABS was scored in both the gut and ovaries of aphids by PCR and identified as a small rod by in situ hybridisation. PABS was not universal in pea aphids: 2/3 laboratory strains and 13/35 of field aphids were PABS-positive. It is suggested that the incidence of PABS in pea aphids is determined by the balance between loss (processes may include occasional failure of vertical transmission and selection against PABS-positive aphids) and horizontal transfer between insects.
ISSN:0168-6496
1574-6941
DOI:10.1111/j.1574-6941.2001.tb00824.x