Fig. 1.

Seven-days growth of strain PM32 at two levels of salinity control; T1 = 1molar NaCl, T2 = 2molar NaCl (a) Bacterial growth against various levels of heavy Pb stress (b) Growth of strain PM32 at elevated temperature (c). At several drought stress levels induced through PEG-8000 (T1 =  − 0.05 Mpa, T2 =  − 0.15 Mpa, T3 =  − 0.30 Mpa, T4 =  − 0.49 Mpa, T5 =  − 0.73 Mpa, T6 =  − 0.97 Mpa) (d)