Sivonen Kaarina, Halinen Katrianna, Sihvonen Leila M, Koskenniemi Kerttu, Sinkko Hanna, Rantasärkkä Kaisa, Moisander Pia H, Lyra Christina
Department of Applied Chemistry and Microbiology, Viikki Biocenter, University of Helsinki, Finland.
Ambio. 2007 Apr;36(2-3):180-5. doi: 10.1579/0044-7447(2007)36[180:bdafit]2.0.co;2.
In this article we summarize the current knowledge of Baltic Sea cyanobacteria, focusing on diversity, toxicity, and nitrogen fixation in the filamentous heterocystous taxa. We also review the recent results of our microbial diversity studies in planktonic and benthic habitats in the Baltic Sea. Based on molecular analyses, we have improved the understanding of cyanobacterial population structure by assessing genetic diversity within species that are morphologically inseparable. Moreover, we have studied microbial functions such as toxin production and nitrogen fixation in situ under different environmental conditions. Phosphorus limitation of bloom-forming, nitrogen-fixing cyanobacteria was clearly verified, emphasizing the importance of continuous efforts to reduce this element in the Baltic Sea. We have designed a rapid and reliable detection method for the toxic cyanobacterium Nodularia spumigena, which can be used to study bloom formation of this important toxin producer.
在本文中，我们总结了目前对波罗的海蓝藻的认识，重点关注丝状异形胞类群中的多样性、毒性和固氮作用。我们还回顾了我们近期在波罗的海浮游和底栖生境中进行的微生物多样性研究结果。基于分子分析，我们通过评估形态上无法区分的物种内的遗传多样性，增进了对蓝藻种群结构的理解。此外，我们还研究了不同环境条件下原位的毒素产生和固氮等微生物功能。形成水华的固氮蓝藻受到磷限制这一点得到了明确验证，这凸显了持续努力减少波罗的海该元素含量的重要性。我们设计了一种针对有毒蓝藻泡沫节球藻的快速可靠检测方法，可用于研究这种重要毒素产生者的水华形成情况。
