Identification of traits shared by rhizosphere-competent strains of fluorescent pseudomonads.

Microbial Ecology
Sandrine GhirardiP Lemanceau

Abstract

Rhizosphere competence of fluorescent pseudomonads is a prerequisite for the expression of their beneficial effects on plant growth and health. To date, knowledge on bacterial traits involved in rhizosphere competence is fragmented and derived mostly from studies with model strains. Here, a population approach was taken by investigating a representative collection of 23 Pseudomonas species and strains from different origins for their ability to colonize the rhizosphere of tomato plants grown in natural soil. Rhizosphere competence of these strains was related to phenotypic traits including: (1) their carbon and energetic metabolism represented by the ability to use a wide range of organic compounds, as electron donors, and iron and nitrogen oxides, as electron acceptors, and (2) their ability to produce antibiotic compounds and N-acylhomoserine lactones (N-AHSL). All these data including origin of the strains (soil/rhizosphere), taxonomic identification, phenotypic cluster based on catabolic profiles, nitrogen dissimilating ability, siderovars, susceptibility to iron starvation, antibiotic and N-AHSL production, and rhizosphere competence were submitted to multiple correspondence analyses. Colonization assays revealed a signifi...Continue Reading

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Citations

Dec 5, 2015·Frontiers in Microbiology·Ruth Gómez ExpósitoIrene De Bruijn
Mar 19, 2014·Environmental Microbiology·Suzanne DonnMichelle Watt
Feb 24, 2015·Frontiers in Microbiology·Maria BonaldiPaolo Cortesi
Oct 12, 2016·The Journal of General and Applied Microbiology·Guillermo A MaronicheAlejandro Perticari
Feb 26, 2016·PloS One·Daniel Garrido-SanzMiguel Redondo-Nieto
Jan 21, 2020·Journal of Medical Microbiology·Maia Kivisaar
Sep 12, 2017·Frontiers in Microbiology·Aurélien Bailly, Laure Weisskopf

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