CAJ | 학술논문

[目的]研究溶藻特性及菌藻关系，为进一步研究溶藻细菌对水华的治理作用提供帮助。[方法]从富营养化水体中分离得到一株有高效溶藻效果的菌株（S7），研究了其对水华鱼腥藻（Anabaenaflosaquae）的抑制效果、作用方式和不同环境因子对溶藻效果的影响，以及菌藻关系，并对菌株进行了菌体Poly—P的染色、革兰氏染色和分子鉴定。【结果]菌株投加量为藻液量的30％时，7d叶绿素a的去除率达到90％以上。pH为9，温度35℃下藻的去除率最高。S7菌株与水华鱼腥藻形成竞争共栖的生态关系，并通过分泌溶藻物质间接抑制水华鱼腥藻生长，且该物质具有一定的热稳定性。根据生理生化及16SrDNA序列分析鉴定，S7属于金黄杆菌属（Chryseobacterium）。【结论]该菌对水华鱼腥藻有较强的溶藻效果，且为聚磷菌。
[목적]연구용조특성급균조관계，위진일보연구용조세균대수화적치리작용제공방조。[방법]종부영양화수체중분리득도일주유고효용조효과적균주（S7），연구료기대수화어성조（Anabaenaflosaquae）적억제효과、작용방식화불동배경인자대용조효과적영향，이급균조관계，병대균주진행료균체Poly—P적염색、혁란씨염색화분자감정。【결과]균주투가량위조액량적30％시，7d협록소a적거제솔체도90％이상。pH위9，온도35℃하조적거제솔최고。S7균주여수화어성조형성경쟁공서적생태관계，병통과분비용조물질간접억제수화어성조생장，차해물질구유일정적열은정성。근거생리생화급16SrDNA서렬분석감정，S7속우금황간균속（Chryseobacterium）。【결론]해균대수화어성조유교강적용조효과，차위취린균。
[Objective] The aim was to explore the relationship between alage-lysing bacterium and Anabaena flosaquae so as to provide reference for the control of bloom. [Method] An algae-lysing bacterium strain named S7 was isolated from eu- trophic river. The lyric efficiency and performing mode of S7 strain to Anabaena flos- aquae was studied. Influence of different environmental factors and the relationship between S7 strain and Anabaena flosaquae was also studied, and then the bacteri- um strain was physiologically identified. [Result] More than 90% of Anabaena flos- aquae had been removed by 7 d when the volume ratio of medium to algae solu- tion was 30%, the pH was 9 and the temperature was 35 ℃. These results also showed that a mutual inhibit relationship existed between S7 strain and Anabaena flos-aquae. The S7 strain killed the algae by indirectly through certain lyric agents in absence of direct contact with the target but by secreting metabolites. Moreover, these lyric agents also had the thermostability. 16SrDNA sequence analysis showed that S7 strain belonged to Chryseobacterium sp. [Conclusion] The examined Poly-p proved that S7 strain is polyphosphate accumulating bacteria （PAOs） and has better lyric efficiency.