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High taxonomic diversity of Micromonospora strains isolated from Medicago sativa nodules in Western Spain and Australia

journal contribution
posted on 2020-01-01, 00:00 authored by Pilar Martínez-Hidalgo, José David Flores-Félix, Encarna Velázquez, Lambert BrauLambert Brau, Martha E Trujillo, Eustoquio Martínez-Molina
The genus Micromonospora has been found in nodules of several legumes and some new species of this genus were isolated from these plant organs. In this study we analysed the taxonomic diversity of Micromonospora strains isolated from alfalfa nodules in Spain and Australia on the basis of three phylogenetic markers, the rrs and gyrB genes and 16S-23S intergenic spacer (ITS). The genome analysis of selected strains representative of different clusters or lineages found after rrs, gyrB and ITS analyses confirmed the results obtained with these phylogenetic markers. They showed that the analysed strains belong to at least 18 Micromonospora species including previously described ones, such as Micromonospora noduli, Micromonospora ureilytica, Micromonospora taraxaci, Micromonospora zamorensis, Micromonospora aurantiaca and Micromonospora tulbaghiae. Most of these strains belong to undescribed species of Micromonospora showing the high taxonomic diversity of strains from this genus inhabiting alfalfa nodules. Although Micromonospora strains are not able to induce the formation of these nodules, and it seems that they do not contribute to fix atmospheric nitrogen, they could play a role related with the mechanisms of plant growth promotion and pathogen protection presented by Micromonospora strains isolated from legume nodules.

History

Journal

Systematic and applied microbiology

Volume

43

Issue

1

Article number

126043

Pagination

1 - 7

Publisher

Elsevier

Location

Amsterdam, The Netherlands

ISSN

0723-2020

Language

eng

Publication classification

C1 Refereed article in a scholarly journal

Copyright notice

2019, Published by Elsevier GmbH

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