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Phenazines producing pseudomonas isolates decrease Alternaria tenuissima growth, pathogenicity and disease incidence on cardoon

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2012
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Authors
Jošić, Dragana
Protolipac, Katarina
Starović, Mira
Stojanović, Saša
Pavlović, Snežana
Miladinović, Miroslav
Radović, Svetlana
article (publishedVersion)
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Abstract
Phenazines, secondary metabolites of fluorescent Pseudomonas, represent a group of heterocyclic nitrogen-containing compounds showing a broad spectrum of antibiotic properties. Phenazines producing fluorescent Pseudomonas species are studied extensively for their application in plant disease management. In this study, we examined the antifungal activity of different indigenous Pseudomonas isolates (Q16, B25 and PS2) against the phytopathogenic fungus Alternaria tenuissima, which had infected cardoon (Cynara cardunculus L., Asteraceae). An in vitro experiment demonstrated the antifungal activity of selected indigenous isolates. In addition, an in vivo experiment under gnotobiotic conditions showed suppression of C. cardunculus disease caused by A. tenuissima. The quantification of phenazines revealed significant amounts of phenazine-1-carboxylic acid (PCA) and 2-hydroxy-phenazine-1-carboxylic acid (2-OH-PCA). PCR analysis confirmed the presence of PCA genes in all examined indigenous Ps...eudomonas isolates. Based on our results, we assume that these Pseudomonas isolates have potential in controlling plant diseases caused by A. tenuissima.

Keywords:
Pseudomonas / Cynara cardunculus / Alternaria tenuissima / phenazines / plant disease management
Source:
Archives of Biological Sciences, 2012, 64, 4, 1495-1503
Publisher:
  • University of Belgrade, University of Novi Sad
Funding / projects:
  • info:eu-repo/grantAgreement/MESTD/Integrated and Interdisciplinary Research (IIR or III)/46007/RS// (RS-46007)
  • info:eu-repo/grantAgreement/MESTD/Technological Development (TD or TR)/31018/RS// (RS-31018)

DOI: 10.2298/ABS1204495J

ISSN: 0354-4664

WoS: 000312046200033

Scopus: 2-s2.0-84867778543
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URI
https://plantarum.izbis.bg.ac.rs/handle/123456789/226
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