A strain of Pseudoalteromonas with alginolytic ability and its application to red tide of Karenia militaris

Abstract

The invention provides a strain of pseudoalteromonas with algae-dissolving ability and its application in controlling the red tide of Karenia militaris, belonging to the field of microbiology of harmful red tide treatment. The alginolytic bacteria named Pseudoalteromonas ( Pseudoalteromonas flavipulchra ) FDHY‑MQ5, was deposited in China Center for Type Culture Collection on May 20, 2019, deposit number: CCTCC NO: M 2019371. The fermentation liquid of this strain is added to the exponential growth phase of Karenia militaris at a volume ratio of 1%, and the 24-hour algicidal rate is 94.3-98.2%. After optimization of the fermentation conditions, bacteria powder can be produced per liter of bacterial liquid It is 18-20g, and the mass fraction of bacteria powder is 0.04%, and the algalysis rate of Karenia militaris is 99.67-100% under the condition of 24 hours of treatment.

Description

technical field

[0001] The invention relates to the field of environmental microorganisms, in particular to a strain of pseudoalteromonas with algae-dissolving ability and its application. Background technique

[0002] In recent decades, the frequency and scale of red tides caused by eutrophication in my country's coastal waters have shown a significant increase. The latest investigation and research results show that the increase in the concentration of carbon dioxide and water temperature in seawater caused by global climate change and further deterioration of the coastal environment in recent years has had a great impact on the physiology of the main harmful red tide algae, resulting in the main cause of red tide species being non-toxic and harmful. The species gradually evolved into a variety of toxic and harmful dinoflagellate red tide species. At present, Karenia michaelii has evolved into the largest toxic and harmful red tide algae species with the largest outbreak ...

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