Invasive Galega officinalis (Goat's rue) plants in Canada form a symbiotic association with strains of Neorhizobium galegae sv. officinalis originating from the Old World

Ecology and Evolution
Eden S P BromfieldStephen J Darbyshire

Abstract

The toxic legume plant, Galega officinalis, is native to the Eastern Mediterranean and Black Sea regions. This legume is considered to be a noxious weed, and its establishment in Canada may have resulted from ornamental planting and/or field trials. In its native range, a highly specific nitrogen-fixing symbiosis with the bacterium, Neorhizobium galegae symbiovar (sv.) officinalis, is required for normal growth. In North America, nothing is known about the bacterial symbionts of G. officinalis. Our purpose was to determine the species and symbiovar identity of symbiotic bacteria associated with invasive plants of G. officinalis at five sites in the province of Ontario, Canada.  Sequence analysis of four housekeeping (16S rRNA, atpD, glnII, and recA) and two symbiosis (nodC and nifH) genes showed that all 50 bacterial isolates from root nodules of G. officinalis at the five Canadian sites were identical to strains of N. galegae sv. officinalis originating either from Europe or the Caucasus. Plant tests indicated that soils collected from four Canadian sites without a history of agriculture or presence of G. officinalis were deficient in symbiotic bacteria capable of eliciting nodules on this plant. Collectively our data support ...Continue Reading

References

Aug 24, 2001·Systematic and Applied Microbiology·G RadevaK Lindström
Feb 13, 2004·Bioinformatics·Gautam AltekarFredrik Ronquist
Feb 11, 2011·Systematic and Applied Microbiology·Marco A RogelEsperanza Martinez Romero
Aug 1, 2012·Nature Methods·Diego DarribaDavid Posada
Jun 28, 2014·International Journal of Systematic and Evolutionary Microbiology·Xiumei YuEden S P Bromfield
Jan 18, 2015·Systematic and Applied Microbiology·Seyed Abdollah MousaviKristina Lindström
Mar 28, 2017·International Journal of Molecular Sciences·Mitchell Andrews, Morag E Andrews

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