Marine Ecosystem Research Center, Korea Institute of Ocean Science and Technology, Busan 49111, Korea.
Water Environmental Engineering Research Division, National Institute of Environmental Research, Incheon 22689, Korea.
Toxins (Basel). 2022 Feb 8;14(2):128. doi: 10.3390/toxins14020128.
Blooms of harmful cyanobacteria lead to an adverse effect on freshwater ecosystems, and thus extensive studies on the control of this cyanobacteria's blooms have been conducted. Throughout this study, we have found that the two bacteria HYD0802-MK36 and KACC10292 are capable of killing . Interestingly, these two bacteria showed different algicidal modes. Based on an algicidal range test using 15 algal species (target and non-target species), HYD0802-MK36 specifically attacked only target cyanobacteria , whereas the algicidal activity of KACC10292 appeared in a relatively broad algicidal range. HYD0802-MK36, as a direct attacker, killed cells when direct cell (bacterium)-to-cell (cyanobacteria) contact happens. KACC10292, as an indirect attacker, released algicidal substance which is located in cytoplasm. Interestingly, algicidal activity of KACC10292 was enhanced according to co-cultivation with the host cyanobacteria, suggesting that quantity of algicidal substance released from this bacterium might be increased via interaction with the host cyanobacteria.
有害蓝藻水华会对淡水生态系统产生不利影响，因此人们广泛研究了控制这种蓝藻水华的方法。在这项研究中，我们发现两种细菌 HYDO802-MK36 和 KACC10292 能够杀死蓝藻。有趣的是，这两种细菌表现出不同的杀藻模式。基于对 15 种藻类（目标和非目标物种）的杀藻范围测试，HYDO802-MK36 专门攻击目标蓝藻，而 KACC10292 的杀藻活性则出现在相对较广的杀藻范围内。HYDO802-MK36 作为直接攻击者，在直接细胞（细菌）-细胞（蓝藻）接触时杀死蓝藻细胞。KACC10292 作为间接攻击者，释放位于细胞质中的杀藻物质。有趣的是，KACC10292 的杀藻活性随着与宿主蓝藻的共培养而增强，这表明该细菌从宿主蓝藻中释放的杀藻物质的数量可能通过与宿主蓝藻的相互作用而增加。
