Grazing and growth of the heterotrophic flagellate Diphylleia rotans on the cyanobacterium Microcystis aeruginosa
Grazing and growth of the heterotrophic flagellate Diphylleia rotans on the cyanobacterium Microcystis aeruginosa
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DOI：
10.3354/ame045163
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发表时间：
2006-11-24
影响因子：
1.4
通讯作者：
Han, Myung-Soo
中科院分区：
文献类型：
--
作者：
Kim, Bo-Ra;Nakano, Shin-ichi;Han, Myung-Soo
研究了嗜铝异养鞭毛藻(HF)对有毒(铜绿微囊藻10001、铜绿微囊藻M IES-298、绿色微囊藻M 102和韦森伯吉微囊藻M wesenbergii NIES-104)和无毒微囊藻以及绿藻Chlorella(TM)(Aquanet)、硅藻小球藻(Cyclella Meneghiniana)和汉氏囊藻(Stephanodisus Hantzschii)的摄食和生长速率。在摄食铜绿假单胞菌时，鞭毛虫D，roans生长活跃，在小球藻(Chlorella，TM)摄食时，鞭毛虫D，roans的生长水平较低，而在摄食南美白对虾和韩氏沼虾S时，D，roans没有生长。在25℃、pH值6~9的条件下，鞭毛虫生长旺盛。当摄食5个微囊藻中毒性最强的铜绿微囊藻M uguginosa NIER-10001时，其最大比生长率最高(1.88d~(-1))，摄食率最高(27.0prey HF-1d~(-1))。这些结果表明，轮藻对铜绿假单胞菌有很高的耐受性，可能通过微囊藻毒素进行生长。
The grazing and growth rates of the algivorous heterotrophic flagellate (HF) Diphylleia rotans were investigated on toxic (Microcystis aeruginosa NIER-10001, M aeruginosa NIES-298, M. viridis NIES-102 and M wesenbergii NIES-104) and non-toxic (M. aeruginosa NIES-101) Microcystis strains as well as other different algae such as the green alga Chlorella (TM) (Aquanet), and diatoms Cyclotella meneghiniana and Stephanodiscus hantzschii. The flagellate D, rotans showed active growth when fed M aeruginosa and lower levels of growth when fed Chlorella (TM), but no growth when fed C. meneghiniana and S, hantzschii. The flagellate grew actively at 25 degrees C and at a pH range between 6 and 9. The highest maximum specific growth rate (1.88 d(-1)) and a high ingestion rate (27.0 prey HF-1 d(-1)) by D. rotans were observed when they were fed the most toxic of the 5 Microcystis strains, M aeruginosa NIER-10001. These results suggest that D. rotans has a high tolerance to M aeruginosa and may undergo microcystin-mediated growth.