Journal of Bacteriology & Parasitology

Characterization and bio-control potent of Streptomyces species isolated from the rhizosphere of saharien legume in Algeria

3^rd International Congress on Bacteriology and Infectious Diseases

August 04-06, 2015 Valencia, Spain

Ghadbane Mouloud1,2, Belhadj Hani1, Medjekal Samir1, Harzallah Daoud1 and Benderradji Laid2

Posters-Accepted Abstracts: J Bacteriol Parasitol

Abstract:

The antimicrobial activity, phyto-stimulating effect and mechanism of action of rhizobacteria isolated from three endemic
legumes in Algeria (Ononis angustissima, Astragalus gombo and Calobota saharae) were evaluated. Phenotypic and
genotypic identification of isolates with high antimicrobial activity revealed the strains Streptomyces sp. 21, 2A26, 1B10 and
2C34. The four Streptomyces sp., solubilize phosphate and produce extracellular fungal cell-wall degrading enzymes chitinase
and protease as well as a marked production of acid-β-indoleacetic (AIA). The In vivo results have revealed that the four strains
of Streptomyces sp. significantly stimulate growth and reduce the disease incidence caused by Fusarium oxysporium in chickpea
(Cicer arietinum L.). These results indicate that the strains of Streptomyces sp. isolated from rhizosphere of Ononis angustissima
could be an interesting source of bioactive substances with a high potential for biological control.