Unearthing the Plant Growth-Promoting Traits of RmBm31, an Endophytic Bacterium Isolated From Root Nodules of

Overview

Journal Front Plant Sci

Date 2020 Mar 17

PMID 32174934

Citations 21

Authors

Malika Affaf Dahmani

Antoine Desrut

Bouziane Moumen

Julien Verdon

Lamia Mermouri

Mourad Kacem

Pierre Coutos-Thevenot

Meriem Kaid-Harche

Thierry Berges

Cecile Vriet

Affiliations

Soon will be listed here.

Abstract

Plants live in association with complex populations of microorganisms, including Plant Growth-Promoting Rhizobacteria (PGPR) that confer to plants an improved growth and enhanced stress tolerance. This large and diverse group includes endophytic bacteria that are able to colonize the internal tissues of plants. In the present study, we have isolated a nonrhizobial species from surface sterilized root nodules of , a perennial leguminous species growing in poor and high salinity soils. Sequencing of its genome reveals this endophytic bacterium is a strain (RmBm31) that possesses a wide range of genomic features linked to plant growth promotion. Furthermore, we show that RmBm31 is able to increase the biomass and positively modify the root architecture of seedlings of the model plant species both in physical contact with its roots and the production of volatile organic compounds. Lastly, we investigated the molecular mechanisms implicated in RmBm31 plant beneficial effects by carrying out a transcriptional analysis on a comprehensive set of phytohormone-responsive marker genes. Altogether, our results demonstrate that RmBm31 displays plant growth-promoting traits of potential interest for agricultural applications.

Citing Articles

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A cyclic dipeptide for salinity stress alleviation and the trophic flexibility of endophyte provide insights into saltmarsh plant-microbe interactions.

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