Yekkour, A. and Sabaou, N. and Zitouni, A. and Errakhi, R. and Mathieu, F. and Lebrihi, A. (2012) Characterization and antagonistic properties of Streptomyces strains isolated from Saharan soils, and evaluation of their ability to control seedling blight of barley caused by Fusarium culmorum. Letters in Applied Microbiology, 55 (6). pp. 427-435.

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Abstract

During a screening for potential plant disease control actinomycetes, a total of 133 strains were isolated from Saharan soil samples of seven Algerian regions by dilution technique on chitin-vitamins agar medium. Screening for antagonistic properties using streak assay method showed that 25 of isolates demonstrated strong activities against a wide range of plant pathogenic fungi. Due to their strong anti-Fusarium activities, six of these isolates were selected and subsequently related to Streptomyces species by polyphasic analysis. These isolates were evaluated for their biocontrol ability against Fusarium culmorum, a serious pathogenic fungus of cereals crops related to damping-off and seedling blight resulting in yield loss. Barley seeds were chosen as cereal plant model. Surface bacterized seeds with TW3, RI3 and TW2 strains expressed the highest performances and permit to reduce significantly both the disease occurrence on seedlings (62-76) and the extent of seedling blight symptoms (over than 95). However, a negative effect on plant establishment was observed for RI3 treatment. © 2012 The Society for Applied Microbiology.

Item Type: Article
Uncontrolled Keywords: chitin; vitamin; antifungal agent; diaminopimelic acid; DNA 16S; galactose; glucose; glycine; nitrate; ribose; sucrose; xanthine, agar; bacterium; barley; biocontrol agent; biological control; chitin; damping-off; fungus; pathogen; seedling; soil microorganism; symptom; taxonomy; yield response, agar medium; Algeria; article; bacterial strain; bacterium isolation; barley; blight; controlled study; dilution; disease severity; fungal plant disease; fusariosis; Fusarium culmorum; nonhuman; nucleotide sequence; plant disease control; screening; seedling; soil; Streptomyces; antibiosis; classification; crop; Fusarium; Hordeum; isolation and purification; metabolism; microbiology; pathogenicity; physiology; plant disease; plant seed; prevention and control; Streptomyces; Algerian; Alternaria; Alternaria brassicola; antifungal activity; Article; Aspergillus carbonarius; Aspergillus flavus; Aspergillus niger; Aspergillus parasiticus; bacterial cell wall; bacterial spore; bacterium examination; blight; Botrytis cinerea; cereal; disease course; DNA hybridization; DNA sequence; Fusarium avenaceum; Fusarium culmorum; Fusarium equiseti; Fusarium graminearum; Fusarium oxysporum; Fusarium proliferatum; Fusarium sporotrichoides; Fusarium verticillioides; in vitro study; microbial activity; microbial pest control; mycelium; nucleotide sequence; Penicillium expansum; Penicillium glabrum; Phomopsis; Phomopsis sclerotioides; phylogeny; plant model; Pythium debaryanum; Rhizoctonia solani; Sclerotinia sclerotiorum; seed treatment; seedling; Streptomyces atrovirens; Streptomyces gancidicus; Streptomyces pseudogriseolus; Streptomyces violaceusniger; surface property; taxonomy, Sahara, Antibiosis; Antifungal Agents; Crops, Agricultural; Fusarium; Hordeum; Plant Diseases; Seedling; Seeds; Soil Microbiology; Streptomyces, Actinobacteria (class); Fungi; Fusarium; Fusarium culmorum; Hordeum; Streptomyces
Subjects: Immunology and Microbiology
Divisions: SCIENTIFIC PRODUCTION > Immunology and Microbiology
Depositing User: Administrateur Eprints Administrateur Eprints
Last Modified: 31 Jan 2020 15:48
URI: http://eprints.umi.ac.ma/id/eprint/3615

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