Fig 1.

Conjugation among B. thuringiensis strains in salt stress conditions in LB (A) and BHI (B) media. The same number of donor and recipient B. thuringiensis strains was mixed and incubated for 4 h at 30°C. The following three different conditions were tested: standard (0.5%), mild (2.5%), and high-salt stress (5% [wt/vol] NaCl) conditions. pAW63 and pUB110 transfer frequencies into the GBJ001 recipient cells were assessed as the number of T/R. The interval bars indicate the standard deviations.