細菌由来のChlamydomonas reinhardtiiおよびAlexadrium catenella接合阻害物質

抄録

Sexual agglutination and zygospore formation of Chlamydomonas reinhardtii, a heterothallic organism, were used for screening of mating inhibitors in culture supernatants and cell extracts of 150 bacterial strains. Both fractions of a gram-negative bacterium, strain NT4, inhibited the mating reaction. When algal vegetative cells were treated with the mating inhibitor, both sexual agglutination and zygospore formation were inhibited. However, when mature gametes were treated with the inhibitor, zygospore formation was inhibited but sexual agglutination was not. The mating inhibitor also blocked hypnozygote formation of a toxic dinoflagellate, Alexandrium catenella, at a concentration 128 times as high as that of C. reinhardtii.