Vol. 50 No. 2 (2011)
Research Papers

Selection of a new Pseudomonas chlororaphis strain for the biological control of Fusarium oxysporum f. sp. radicis-lycopersici

Gerardo PUOPOLO
Dipartimento di Arboricoltura, Botanica e Patologia Vegetale della Università degli Studi di Napoli "Federico II"
Aida RAIO
stituto per la Protezione delle Piante-CNR, Via Madonna del Piano, 10, 50019 Sesto Fiorentino (FI)
Leland PIERSON
Department of Plant Pathology & Microbiology, Texas A&M University, 202 Horticultural and Forestry Sciences Building, College Station, TX 77843-2133
Astolfo ZOINA
Dipartimento di Arboricoltura, Botanica e Patologia Vegetale della Università degli Studi di Napoli "Federico II"

Published 2011-07-11

Keywords

  • recA,
  • phenazines

How to Cite

[1]
G. PUOPOLO, A. RAIO, L. PIERSON, and A. ZOINA, “Selection of a new Pseudomonas chlororaphis strain for the biological control of Fusarium oxysporum f. sp. radicis-lycopersici”, Phytopathol. Mediterr., vol. 50, no. 2, pp. 228–235, Jul. 2011.

Abstract

Fluorescent pseudomonads possess several physiological characteristics exploitable for the biological control of phytopathogenic fungi. A group of 11 pseudomonads able to inhibit tomato pathogenic fungi in vitro were identified using the Biolog test and the phylogenetic analysis of recA. Strain M71 of Pseudomonas chlororaphis was selected as a new potential biocontrol agent. This strain drastically reduced Fusarium oxysporum f. sp. radicis-lycopersici pathogenicity on tomato plantlets in seed assays and greenhouse trials. Moreover, the strain produced several important secondary metabolites, including proteases, siderophores and antibiotics. The presence of a region involved in phenazine production and the biosynthesis of N-acyl homoserine lactones were also assessed.

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