Aims: Algicidal bacteria can be used for control of harmful algal bloom and extraction of algal bioproducts based on their algae-lysing activities. This work investigated the algae-lysing activity of a newly isolated algicidal bacterium, Paenibacillus polymyxa strain MEZ6 and its possible mechanisms. Methods and Results: Algicidal bacteria were isolated from soil samples collected at the university campus. Co-inoculation tests identified that one isolate, MEZ6, can rapidly kill eukaryotic algae including Chlamydomonas reinhardtii, Tribonema min...