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A bacterium that inhibits the growth of Pfiesteria piscicida and other dinoflagellates

机译：抑制Pfiesteria piscicida和其他鞭毛虫生长的细菌

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Toxic dinoflagellate blooms have increased in estuaries of the east coast of the United States in recent years, and the discovery of Pfiesteria piscicida has brought renewed attention to the problem of harmful algal blooms (HAB) in general. Many bacteria and viruses have been isolated that have algicidal or algistatic effects on phytoplankton, including HAB species. Twenty-two bacterial isolates from the Delaware Inland Bays were screened for algicidal activity. One isolate (Shewanella IRI-160) had a growth-inhibiting effect on all three dinoflagellate species tested, including P. piscicida (potentially toxic zoospores), Prorocentrum minimum, and Gyrodinium uncatenum. This bacterium did not have a negative effect on the growth of any of the other four common estuarine non-dinoflagellate species tested, and in fact had a slight stimulatory effect on a diatom, a prasinophyte, a cryptophyte, and a raphidophyte. Shewanella IRI-160 is the first non-microzooplankton example of a microbe with the ability to control and inhibit the growth of P. piscicida, suggesting that bacteria in the natural environment could play a role in controlling the growth and abundance of P. piscicida and other dinoflagellates. Such bacteria could also potentially be used as management tools to prevent the proliferation of potentially harmful dinoflagellates in estuaries and coastal waters.
机译：近年来，在美国东海岸的河口中，有毒的鞭毛藻类花粉增多，而Pfiesteria piscicida的发现已引起人们对一般有害藻类花粉（HAB）问题的重新关注。已分离出许多细菌和病毒，包括HAB物种，对藻类浮游生物具有杀藻或抑藻作用。筛选了来自特拉华州内陆湾的22个细菌分离株的杀藻活性。一种分离株（希瓦氏菌IRI-160）对所有三种被检出的鞭毛鞭毛藻具有生长抑制作用，包括P. piscicida（潜在有毒的游动孢子），Prorocentrum minimum和Gyrodinium uncatenum。该细菌对其他四种常见的河口非双鞭毛藻物种的生长没有负面影响，并且实际上对硅藻，古植物，隐生植物和斜纹植物有轻微的刺激作用。希瓦氏菌IRI-160是第一个非微浮游细菌实例，具有控制和抑制毕加索氏菌生长的能力，这表明自然环境中的细菌可以在控制毕加索氏菌的生长和丰度中发挥作用。其他鞭毛虫。此类细菌还可能被用作管理工具，以防止潜在有害的鞭毛藻在河口和沿海水域扩散。

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