Title
Identification of the bacterial endosymbionts in leaf nodules of Pavetta (Rubiaceae)Identification of the bacterial endosymbionts in leaf nodules of Pavetta (Rubiaceae)
Author
Faculty/Department
Faculty of Sciences. Biology
Research group
Integrated Molecular Plant Physiology Research (IMPRES)
Publication type
article
Publication
Spencers Wood,
Subject
Biology
Source (journal)
International journal of systematic and evolutionary microbiology. - Spencers Wood
Volume/pages
62(2012):1, p. 202-209
ISSN
1466-5026
ISI
000300136200034
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
Three genera in the Rubiaceae (Pavetta, Psychotria and Sericanthe) harbour bacterial endosymbionts within leaf nodules or galls. The present paper identifies the bacterial endophytes in three leaf-nodulating Pavetta species. In order to reveal their identity and assess their phylogenetic position, 16S rRNA, recA and gyrB genes were sequenced from an extensive sampling of Burkholderia strains. This multigene approach results in a robust phylogeny, which places the bacterial endosymbionts of Pavetta at two distinct positions within the genus Burkholderia (class Betaproteobacteria), suggesting that leaf-nodulating endosymbionts within Pavetta have different origins. The endophytes of nodulated Psychotria species were recognized as the closest relatives to the Payette endosymbionts. Our results suggest that the endosymbionts of Payette represent novel species, which can be classified as 'Candidatus Burkholderia hispidae', 'Candidatus Burkholderia rigidae' and 'Candidatus Burkholderia schumannianae'.
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