Streptomyces neyagawaensis as a control for the hazardous biomass of Microcystis aeruginosa (Cyanobacteria) in eutrophic freshwaters
Streptomyces neyagawaensis as a control for the hazardous biomass of Microcystis aeruginosa (Cyanobacteria) in eutrophic freshwaters
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DOI：
10.1016/j.biocontrol.2005.03.007
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发表时间：
2005-06-01
影响因子：
4.2
通讯作者：
Han, MS
中科院分区：
文献类型：
--
作者：
Choi, HJ;Kim, BH;Han, MS
从富营养化湖泊（韩国珠岩湖）的沉积物中分离出一种能够消除铜绿微囊藻蓝藻的水生细菌。根据16S rDNA序列以及生化和形态学特征，确定该菌株为Neyakawa链霉菌。它在 40 摄氏度和 pH 7 的条件下生长最佳。在这种细菌存在的情况下，铜绿蓝藻 NIES-298 的生物量受到强烈抑制，与对照相比，丰度高达 84.5%。 S. neyagaivaensis 的抗藻活性取决于蓝藻的生长阶段，而不是抗藻细菌的生长阶段。 S. neyagaivaensis 的抗藻活性可有效对抗多种藻类，包括绿藻小球藻、颗粒硅藻和 Stephanodiscus hantzschii，以及四种蓝藻、铜绿微藻 NIES-44、圆柱鱼腥藻、花鱼腥藻和圣颤藻。 S. neyagaivaensis 通过分泌细胞外抗藻物质间接攻击铜绿微藻，这些物质位于细菌周质中，比活性为 7.7 U/μg。这些结果表明，从沉积物中分离出的本土细菌可能具有控制淡水中有害蓝藻水华的潜在应用。 (c) 2005 Elsevier Inc. 保留所有权利。
An aquatic bacterium capable of eliminating the cyanobacterium Microcystis aeruginosa was isolated from the sediment of an eutrophic lake (Lake Juam, Korea). On the basis of 16S rDNA sequences and biochemical and morphological characteristics, the isolate was determined to be Streptomyces neyagawaensis. It grew optimally at 40 degrees C and pH 7. In the presence of this bacterium, the biomass of cyanobacterium M. aeruginosa NIES-298 was strongly suppressed, by up to 84.5% in abundance compared to the control. The antialgal activity of S. neyagaivaensis depended on the growth phase of the cyanobacterium, but not of the antialgal bacterium. The antialgal activity of S. neyagaivaensis was effective against a wide range of algae, including the green alga Chlorella sp., the diatoms Aulacoseira granulata and Stephanodiscus hantzschii, and four cyanobacteria, M. aeruginosa NIES-44, Anabaena cylindrica, Anabaena flos-aquae, and Oscillatoria sancta. S. neyagaivaensis indirectly attacked M. aeruginosa by secretion of extracellular antialgal substances that were localized in the bacterial periplasm and had a specific activity of 7.7 U/mu g. These results suggest that indigenous bacteria isolated from sediments may have potential application in controlling harmful cyanobacterial blooms in freshwaters. (c) 2005 Elsevier Inc. All rights reserved.