Zhang Xue, Hu Hong-Ying, Hong Yu
Department of Environmental Science and Engineering, Division of Environmental Biology, Tsinghua University, Beijing 100084, China.
Water Sci Technol. 2009;59(9):1727-32. doi: 10.2166/wst.2009.200.
A flagellate Jin821 which could feed on toxic cyanobacteria Microcystis aeruginosa was isolated, and it was identified as a species of golden alga according to its morphological characters and 18S rDNA genes. The results of feeding experiments showed that the golden alga Jin821 could make the high density (4.3x10(6) cells.mL(-1)) of M. aeruginosa clear in a short time (40 h), with a removal rate of 99.9%. And the microcystin (MC-LR) was also degraded effectively at the same time, with a removal rate of 82.7% of 114 microg/L in 40 h. The growth curve of Jin821 was in 'S' style, with four phases of lag, log, stationary and decline. When M. aeruginosa was cleaned out, Jin821 would decline in number and slowed down in movement. In summary, the golden alga Jin821 can be a potential biological way to control blue algal blooms in the future.
分离出一株能以有毒蓝藻铜绿微囊藻为食的鞭毛藻Jin821，并根据其形态特征和18S rDNA基因将其鉴定为金藻门的一个物种。摄食实验结果表明，金藻Jin821能在短时间（40小时）内使高密度（4.3×10⁶个细胞·mL⁻¹）的铜绿微囊藻消失，去除率达99.9%。同时，微囊藻毒素（MC-LR）也被有效降解，40小时内对114μg/L的去除率为82.7%。Jin821的生长曲线呈“S”形，有延迟期、对数期、稳定期和衰退期四个阶段。当铜绿微囊藻被清除后，Jin821数量会减少，运动也会减缓。综上所述，金藻Jin821未来可能成为控制蓝藻水华的一种潜在生物方法。
