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Research article - Peer-reviewed, 2022

Plant Growth-Promoting Activity of Pseudomonas aeruginosa FG106 and Its Ability to Act as a Biocontrol Agent against Potato, Tomato and Taro Pathogens

Ghadamgahi, Farideh; Tarighi, Saeed; Taheri, Parissa; Saripella, Ganapathi Varma; Anzalone, Alice; Kalyandurg, Pruthvi Balachandra; Catara, Vittoria; Ortiz, Rodomiro; Vetukuri, Ramesh Raju

Abstract

Simple Summary Microbial bio-stimulants are attracting increasing attention in agricultural research. In particular, plant growth-promoting rhizobacteria (PGPR) have great potential to improve crops' productivity and tolerance of biotic and abiotic stresses. It is anticipated that PGPR could eventually replace synthetic fungicides in agriculture. This research evaluated Pseudomonas aeruginosa strain FG106-which was isolated from tomato plants- as a potential biocontrol agent against several plant pathogens. This strain displayed multiple plant growth-promoting attributes and high in vitro and in vivo inhibition of growth and pathogenicity of tested phytopathogens. It is thus a multifunctional PGPR with potential applications as a biocontrol agent to control fungal and bacterial pathogens. P. aeruginosa strain FG106 was isolated from the rhizosphere of tomato plants and identified through morphological analysis, 16S rRNA gene sequencing, and whole-genome sequencing. In vitro and in vivo experiments demonstrated that this strain could control several pathogens on tomato, potato, taro, and strawberry. Volatile and non-volatile metabolites produced by the strain are known to adversely affect the tested pathogens. FG106 showed clear antagonism against Alternaria alternata, Botrytis cinerea, Clavibacter michiganensis subsp. michiganensis, Phytophthora colocasiae, P. infestans, Rhizoctonia solani, and Xanthomonas euvesicatoria pv. perforans. FG106 produced proteases and lipases while also inducing high phosphate solubilization, producing siderophores, ammonia, indole acetic acid (IAA), and hydrogen cyanide (HCN) and forming biofilms that promote plant growth and facilitate biocontrol. Genome mining approaches showed that this strain harbors genes related to biocontrol and growth promotion. These results suggest that this bacterial strain provides good protection against pathogens of several agriculturally important plants via direct and indirect modes of action and could thus be a valuable bio-control agent.

Keywords

bacterial endophytes; biocontrol; bio-stimulants; plant growth; strain FG106

Published in

Biology
2022, volume: 11, number: 1, article number: 140

Authors' information

Ferdowsi University of Mashhad
Swedish University of Agricultural Sciences, Department of Plant Breeding
Tarighi, Saeed
Ferdowsi University Mashhad
Taheri, Parissa
Ferdowsi University Mashhad
Swedish University of Agricultural Sciences, Department of Plant Breeding
Anzalone, Alice
University of Catania
Swedish University of Agricultural Sciences, Department of Plant Breeding
Catara, Vittoria
University of Catania
Ortiz, Rodomiro (Ortiz Rios, Rodomiro Octavio)
Swedish University of Agricultural Sciences, Department of Plant Breeding
Vetukuri, Ramesh (Ramesh, Vetukuri)
Swedish University of Agricultural Sciences, Department of Plant Breeding

Sustainable Development Goals

SDG2 Zero hunger

UKÄ Subject classification

Agricultural Science

Publication Identifiers

DOI: https://doi.org/10.3390/biology11010140

URI (permanent link to this page)

https://res.slu.se/id/publ/115457