African Journal of
Microbiology Research

  • Abbreviation: Afr. J. Microbiol. Res.
  • Language: English
  • ISSN: 1996-0808
  • DOI: 10.5897/AJMR
  • Start Year: 2007
  • Published Articles: 5233

Full Length Research Paper

Antagonistic interactions among cultivable actinomycetes isolated from agricultural soil amended with organic residues

Sonia Mokni-Tlili*, Naceur Jedidi and Abdennaceur Hassen
Laboratoire de Traitement et Recyclage des Eaux Usées, Centre des Recherches et des Technologies des Eaux, Technopole de Borj Cedria, BP 273, Soliman 8020-Tunisie.
Email: [email protected]

  •  Accepted: 23 August 2011
  •  Published: 25 June 2013


The present work focuses on the antagonistic interactions among cultivable actinomycetes isolated from agricultural soil and organic amendments (farmyard manure and municipal solid waste compost). Antagonistic interactions, assayed by the double-layer agar method, were checked among isolates obtained from (i) the same treatment (ii) control soil (unamended) against those from amendments and (iii) each treatment against tow phytopatogenic bacteria (Agrobacterium tumefaciens B6 and C58). A high suppressive interaction ratio (≥ 50%) was registered some either the treatment soil. It was found that amendments application decreased this suppressive interaction ratio betweenactinomycetales. But, it increases the ratio of the antagonistic actinomycetales from soil against Agrobacterium tumefaciens confirming the role of these organic residues as fertilizers. It was also shown, based on the phylogenetic affiliation of bacteria, that theantagonism can play a significant role in structuring bacterial communities in soil.


Key words: Antagonism, Actinomycetales, agricultural soil, manure, compost.