Unearthing the Plant Growth-Promoting Traits of Bacillus megaterium RmBm31, an Endophytic Bacterium Isolated From Root Nodules of Retama monosperma .

Autor:	Dahmani MA; Laboratoire des Productions, Valorisation végétales et microbiennes (LP2VM), Département de biotechnologies, Faculté SNV, Université des Sciences et de la Technologie d'Oran-Mohammed BOUDIAF (USTO M.B), Oran, Algéria.; Laboratoire Signalisation et Transports Ioniques Membranaires (STIM), CNRS EA7349, Université de Poitiers, Poitiers, France., Desrut A; Laboratoire Ecologie et Biologie des Interactions (EBI), UMR CNRS 7267, Université de Poitiers, Poitiers, France., Moumen B; Laboratoire Ecologie et Biologie des Interactions (EBI), UMR CNRS 7267, Université de Poitiers, Poitiers, France., Verdon J; Laboratoire Ecologie et Biologie des Interactions (EBI), UMR CNRS 7267, Université de Poitiers, Poitiers, France., Mermouri L; Laboratoire des Productions, Valorisation végétales et microbiennes (LP2VM), Département de biotechnologies, Faculté SNV, Université des Sciences et de la Technologie d'Oran-Mohammed BOUDIAF (USTO M.B), Oran, Algéria., Kacem M; Département de Biotechnologie, Faculté SNV, Université d'Oran Ahmed Ben Bella, Oran, Algéria., Coutos-Thévenot P; Laboratoire Ecologie et Biologie des Interactions (EBI), UMR CNRS 7267, Université de Poitiers, Poitiers, France., Kaid-Harche M; Laboratoire des Productions, Valorisation végétales et microbiennes (LP2VM), Département de biotechnologies, Faculté SNV, Université des Sciences et de la Technologie d'Oran-Mohammed BOUDIAF (USTO M.B), Oran, Algéria., Bergès T; Laboratoire Signalisation et Transports Ioniques Membranaires (STIM), CNRS EA7349, Université de Poitiers, Poitiers, France., Vriet C; Laboratoire Ecologie et Biologie des Interactions (EBI), UMR CNRS 7267, Université de Poitiers, Poitiers, France.
Jazyk:	angličtina
Zdroj:	Frontiers in plant science [Front Plant Sci] 2020 Feb 27; Vol. 11, pp. 124. Date of Electronic Publication: 2020 Feb 27 (Print Publication: 2020).
DOI:	10.3389/fpls.2020.00124
Abstrakt:	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 Retama monosperma , a perennial leguminous species growing in poor and high salinity soils. Sequencing of its genome reveals this endophytic bacterium is a Bacillus megaterium 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 Arabidopsis thaliana both in physical contact with its roots and via 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. (Copyright © 2020 Dahmani, Desrut, Moumen, Verdon, Mermouri, Kacem, Coutos-Thévenot, Kaid-Harche, Bergès and Vriet.)
Databáze:	MEDLINE
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