RRC ID 73708
Author Mohammad Zarrabian, Jesús Montiel, Niels Sandal, Shaun Ferguson, Haojie Jin, Yen-Yu Lin, Verena Klingl, Macarena Marín, Euan K. James, Martin Parniske, Jens Stougaard, Stig U. Andersen
Title A Promiscuity Locus Confers Lotus burttii Nodulation with Rhizobia from Five Different Genera
Journal Molecular Plant-Microbe Interactions®
Abstract Legumes acquire access to atmospheric nitrogen through nitrogen fixation by rhizobia in root nodules. Rhizobia are soil-dwelling bacteria and there is a tremendous diversity of rhizobial species in different habitats. From the legume perspective, host range is a compromise between the ability to colonize new habitats, in which the preferred symbiotic partner may be absent, and guarding against infection by suboptimal nitrogen fixers. Here, we investigate natural variation in rhizobial host range across Lotus species. We find that Lotus burttii is considerably more promiscuous than Lotus japonicus, represented by the Gifu accession, in its interactions with rhizobia. This promiscuity allows Lotus burttii to form nodules with Mesorhizobium, Rhizobium, Sinorhizobium, Bradyrhizobium, and Allorhizobium species that represent five distinct genera. Using recombinant inbred lines, we have mapped the Gifu/ burttii promiscuity quantitative trait loci (QTL) to the same genetic locus regardless of rhizobial genus, suggesting a general genetic mechanism for symbiont-range expansion. The Gifu/ burttii QTL now provides an opportunity for genetic and mechanistic understanding of promiscuous legume-rhizobia interactions. [Formula: see text] Copyright © 2022 The Author(s). This is an open access article distributed under the CC BY 4.0 International license .
Volume 35
Pages 1006-1017
Published 2022-11-1
DOI 10.1094/mpmi-06-22-0124-r
PMID 35852471
MeSH Bradyrhizobium* / genetics Lotus* / genetics Lotus* / microbiology Mesorhizobium* / genetics Nitrogen Rhizobium* / genetics
Lotus / Glycine Lotus Burttii Gifu B-129