Isolation of actinomycetes from different soils of Beni Amir Morocco

Actinomycetes strains were isolated for the first time from 11 soil samples from the Beni Amir region of Morocco. A physicochemical characterization of the different soils studied shows that each sample represents a particular ecosystem. Isolation was performed using two culture media Bennett and minimal synthetic media (MMS). Number of bacteria varies from 0.03 × 10⁸ UFC/g to 146 × 10⁸ UFC/g, from 0.36 × 10⁵ UFC/g to 209 × 10⁵ UFC/g for the actinomycetes and from 0.51 × 10⁵ UFC/g to 2310.33 × 10⁵ UFC/g for mushrooms. Thus, a percentage of actinomycetes relative to the total microflora is maximum on the S4 site (20.31%) and minimum (0.001%) on the S11 site. It seems that the distribution of actinomycetes in the studied soils is influenced by the physicochemical factors prevailing there. Indeed, the percentage of actinomycetes shows a positive correlation with organic matter and total organic carbon and negative correlation with other parameters such as pH, moisture, potassium and phosphorus.