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OALib Journal期刊
ISSN: 2333-9721
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变形虫naegleriasp.th8的分离鉴定及食藻特性
DOI: 10.3724/SP.J.1145.2012.00245, PP. 245-250
Keywords: 原生动物,纳氏变形虫,食藻特性,水华鱼腥藻,生物控藻,太湖
Abstract:
从太湖水样品中筛选分离到一株能吞噬水华鱼腥藻的原生动物th8，经形态学及itsrrna序列分析鉴定为纳氏属变形虫（naegleriasp.）.显微观察显示变形虫th8呈蛞蝓状，用透明半球形单伪足爆破前进，有运动滋养体、包囊和鞭毛体3个形态.变形虫th8能在10~30℃生长并具有食藻活性，但在37℃或灭菌后的水华鱼腥藻中均不能生长.在新鲜水华鱼腥藻中25℃下指数期生长速率达到1.68celld-1.食藻特性研究表明，该变形虫在水华鱼腥藻生长的对数初期、对数后期和稳定期的吞食效果优于对数中期.水华鱼腥藻chla下降程度与变形虫初始浓度有关.图5表1参30
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