Stability of predation activity of the lysate of C. vulgaris under different physicochemical conditions.

(A). Temperature from 20–121°C. For temperature stability, lysate of C. vulgaris were inoculated and kept at different temperatures for 1 h and then the treated samples were added into the C. vulgaris cultures. (B). For pH stability, pH of lysate (initial pH = 7.85) were adjusted to other pH values (5.5–9.5). After being kept for 1 h, the pH of each was readjusted to pH = 7.85. (C). For salinity stability, the salinity of the lysate (initial salinity = 30‰) were adjusted to other salinity values and kept for 1 h, then readjusted to the initial salinity.