3.2. Identification of endophytic actinomycetes
Thirty-four endophytic actinomycetes were isolated from the
eight native Algerian Saharan plants. The morphological characteristics
and the cell wall type (Table 1) confirmed that the majority
of isolates (29 isolates) belonged to the genus Streptomyces
. Endophytic
Streptomyces strains were isolated from all studied native
plants. They were classified in three groups according to the color
of the aerial hyphae on ISP3 agar. The majority of them (22 isolates)
belonged to the grey group. The yellow and the green groups
comprised
5 and
2 isolates, respectively. The majority of the Streptomyces
isolates (82.8%) produced a spiral type of spore-chain and
the remaining ones (17.2%) produced
a rectiflexibiles type.