Stimulative and inhibitory effects of bacteria on the growth of microalgae
Stimulative and inhibitory effects of bacteria on the growth of microalgae
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DOI：
10.1023/a:1003139402315
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发表时间：
1997-12-22
期刊：
影响因子：
2.6
通讯作者：
Ishida, Y
中科院分区：
文献类型：
--
作者：
Fukami, K;Nishijima, T;Ishida, Y
介绍了细菌对微藻生长的促进和抑制作用的几个实例，探讨了细菌在藻类大量培养中的重要性。硅藻通常被用作海胆和双壳类的浮游幼虫的活食物。利用清洁、高营养含量的深海海水培养单分散角毛藻。但是，硅藻的生长速率和细胞产量在较大程度上随DSW采集的季节而波动。当从DSW分离的一些细菌菌株加入到培养物中时，硅藻的生长通常被刺激，并且获得相对恒定的细胞产量。另一种硅藻C. gracilis也通过向培养物中加入一些细菌菌株来刺激。细菌对硅藻的积极影响不仅观察到浮游物种，但也附着的物种。一种底栖硅藻，菱形藻，是由基质表面的产碱菌细菌膜刺激的。另一方面，在赤潮消退期间从天然海水中分离的一株黄杆菌对赤潮浮游生物米氏裸甲藻具有强烈的杀藻作用。最近的研究显示，许多细菌菌株对多种赤潮浮游生物有显著的溶藻作用。这些结果表明，应考虑细菌的影响，以获得稳定的大量培养的食用微藻。
Several examples of stimulative and inhibitory effects of bacteria on microalgal growth are introduced, and the importance of bacteria in algal mass culture is investigated. Diatoms are often used as live food for planktonic larvae of sea urchin and bivalves. Monodispersed Chaetoceros ceratosporum has been cultivated by using clean, high nutrient content, deep seawater (DSW). However, the growth rate and cell yield of diatoms fluctuated, to relatively large extent, with the season that DSW was collected. When some bacterial strains isolated from DSW were added to the culture, diatom growth was often stimulated and a relatively constant cell yield was obtained. Another diatom species, C. gracilis, was also stimulated by adding some bacterial strains to cultures. The positive effect of bacteria on diatoms was observed not only for planktonic species, but also on attached species. A benthic diatom, Nitzschia sp., was stimulated by a bacterial film of Alcaligenes on the surface of the substratum. On the other hand, a strain of Flavobacterium sp. isolated from natural seawater during the decline period of an algal bloom had a strong algicidal effect on the red tide plankton, Gymnodinium mikimotoi. Recent reports demonstrate that many bacterial strains have significant algicidal effects on many species of red tide plankton. These results indicate that bacterial effects should be taken into account to obtain stable mass culture of food microalgae.