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Pantoea agglomerans-associated bacteria in grape phylloxera (Daktulosphaira vitifoliae, Fitch)

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1 Grape phylloxera lack intracellular symbionts, but the leaf-galling form appears to be associated with a single microbial species.

2 16S and 18SrDNA sequences were used for identification of symbiotic material.

3 A single bacterial species, closely related to Pantoea agglomerans, was identified in adult parthenogenetic individuals, their eggs and leaf gall tissue of several populations.

4 A 16S rDNA primer pair was designed to test grape phylloxera populations more specifically for the presence of P. agglomerans.

5 16S rDNA sequences of the identified bacteria were very similar to already-known secondary symbionts occurring in aphids, thrips and other insects.

6 The identified bacteria were culturable on simple media, which demonstrates that the relationship between grape phylloxera and P. agglomerans is not as firm as that of the obligately endosymbiotic Buchnera aphidicola and other aphids.

Keywords: 16SrDNA; Associated bacteria; Pantoea agglomerans; grape phylloxera

Document Type: Research Article


Affiliations: Institute Cavanilles of Biodiversity and Evolutionary Biology, University of Valencia, AO 22085, 46071 Valencia, Spain

Publication date: February 1, 2007


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