Biochemical tests Bacterial isolates   S42 SV39 SV41 SV44 SV65 SV104 Catalase + + + + + + Red of Methyl - - - - - - Vosges-Proskauer + + + + + + Mannitol - + + + + + Lecithinase + - - - - - Indole + + + + + + Simmons Citrate + - + + - + Urease - + - - - - Tryptophanedesaminase - - + + - - Nitrate reducatase + - + + + + Glucose + + + + + - Lactose - - - - - + Gaz + + + + + - Hydrogen sulfide - - - - - - King A - - - - - -

Table 2: Biochemical characterization of the six bacterial isolates from wild Solanaceae stems. +: Positive test, -: Negative test. S42: Bacterial isolate from Nicotiana glauca stems; SV39, SV41 and SV44: Bacterial isolates from internal tissues of stems of Datura metel; SV65: Bacterial isolate from internal tissues of stems of Solanum nigrum; SV104: Bacterial isolate from internal tissues of stems of S.elaeagnifolium.