Kacem M. auteur aut IRD Kazouz F. auteur aut IRD Merabet C. auteur aut IRD Rezki M. auteur aut IRD Lajudie de Philippe auteur aut IRD Bekki A. auteur aut IRD text journalArticle eng text/pdf born digital access In the present investigation, six Rhizobium strains isolated from Algerian soil were checked for their antimicrobial activity against Pseudomonas savastanoi, the agent responsible for olive knot disease. Rhizobium sp. ORN 24 and ORN 83 were found to produce antimicrobial activities against Pseudomonas savastanoi. The antimicrobial activity produced by Rhizobium sp. ORN24 was precipitable with ammonium sulfate, between 1,000 and 10,000 KDa molecular weight, heat resistant but sensitive to proteases and detergents. These characteristics suggest the bacteriocin nature of the antimicrobial substance produced by Rhizobium sp. ORN24, named rhizobiocin 24. In contrast, the antimicrobial activity produced by Rhizobium sp. ORN83 was not precipitable with ammonium sulfate; it was smaller than 1,000 KDa molecular weight, heat labile, and protease and detergent resistant. These characteristics could indicate the relationship between the antimicrobial substance produced by Rhizobium sp. ORN 83 and the "small" bacteriocins described in other rhizobia. specialized Algeria Antagonism Bacteriocin Biocontrol Olives Pseudomonas savastanoi Rhizobium 076 084 60 2 139-146 2009 0017-3495 https://www.documentation.ird.fr/hor/fdi:010046151 10.3989/gya.074808 0017-3495 [F B010046151] https://www.documentation.ird.fr/hor/fdi:010046151 https://www.documentation.ird.fr/intranet/publi/2009/06/010046151.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2009-07-08 2017-08-23 fdi:010046151 fre