Abiotic factors in colony formation： effects of nutrition and light on extracellular polysaccharide production and cell aggregates of Microcystis aeruginosa

• Published in: Chinese journal of oceanology and limnology Vol. 31; no. 4; pp. 796 - 802
• Main Author: 阳振 孔繁翔
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer-Verlag 01.07.2013; Springer Berlin Heidelberg; Springer Nature B.V
• Subjects: Abiotic factors; Abiotic stress; Biology; cell aggregates; Cell culture; Cyanobacteria; Cytology; Earth and Environmental Science; Earth Sciences; Eutrophic lakes; Eutrophication; Freshwater; Inland waters; Lakes; Light intensity; Luminous intensity; Marine; Microcystis; Microcystis aeruginosa; Morphology; Nutrient concentrations; nutrient content; Nutrition; Oceanography; Phytoplankton; Polysaccharides; temperature; 光照强度; 富营养化湖泊; 生产; 细胞聚集; 胞外多糖; 铜绿微囊藻; 集落形成; 非生物因素; colony formation; abiotic factors; cell aggregates
• ISSN: 0254-4059; 2096-5508; 1993-5005; 2523-3521
• DOI: 10.1007/s00343-013-2264-2

Colony morphology is important for Microcystis to sustain a competitive advantage in eutrophic lakes. The mechanism of colony formation in Microcystis is currently unclear. Extracellular polysaccharide （EPS） has been reported to play an important role in cell aggregate formation of some phytoplankton. Microcystis aeruginosa was cultivated under varied abiotic conditions, including different nutrient, light, and temperature conditions, to investigate their effects on EPS production and morphological change. The results show that nutrient concentration and light intensity have great effects on EPS production in M. aeruginosa. There was a considerable increase in EPS production after M. aeruginosa was cultivated in adjusted culture conditions similar to those present in the field （28.9 mg C/L, 1.98 mg N/L, 0.65 mg P/L, light intensity： 100 μtmol/（m2.s））. These results indicate that abiotic factors might be one of the triggers for colony formation in Microcystis.