Abstract(s) :

(Anglais) Durum wheat (Triticum durum Desf.) productivity is severely affected by major biotic and abiotic factors including salinity and phytopathogens fungi. Several approaches were used to reduce salinity effects on durum wheat, which included the use of Plant Growth Promoting Actinobacteria (PGPA). The present study was conducted to evaluate the ability of thermophilic actinobacteria, isolated from saharan sites to promote Durum wheat (Triticum durum Desf.) growth in the absence and presence of salt stress and to investigate their antifungal potential against Aspergillus niger. The effect of actinomycete inoculations in saline condition on Triticum durum behavior was studied. The salt stress was generated by application of different NaCl doses. The Screening for antifungal activity of actinomycetes isolates was done against phytopathogenic filamentous fungi Aspergillus niger by the agar cylinders method. Results demonstrated that thermophilic actinomycete strains promoted Durum wheat plant growth significantly even in the presence of salt. Inoculations with PGPR improved the plant growth, and increased the root and shoot lenghts, chlorophyll contents, and prolin content as compared to plants with no bacterial treatment (control). The PGPB strains WCD, OTH 1.3.1 and OTH 2.2.2.3 showed good in vitro antifungal (inhibition > 55%) control.