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Cd(II) exposure caused hormesis in the growth of<jats:italic>M. aeruginosa<\/jats:italic>. Low concentrations of Cd(II) significantly induced formation of small<jats:italic>Microcystis<\/jats:italic>colonies (<mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" id=\"M1\"><mml:mi>P<\/mml:mi><mml:mo>&lt;<\/mml:mo><mml:mn fontstyle=\"italic\">0.05<\/mml:mn><\/mml:math>) and increased the intracellular polysaccharide (IPS) and bound extracellular polysaccharide (bEPS) contents of<jats:italic>M. aeruginosa<\/jats:italic>significantly (<mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" id=\"M2\"><mml:mi>P<\/mml:mi><mml:mo>&lt;<\/mml:mo><mml:mn fontstyle=\"italic\">0.05<\/mml:mn><\/mml:math>). There was a linear relationship between the amount of Cd(II) sequestrated by algal cells and the amount added to cultures in the rapid adsorption process that occurred during the first 5 min of exposure. After 10\u2009d,<jats:italic>M. aeruginosa<\/jats:italic>sequestrated nearly 80% of 0.2\u2009mg\u2009L<jats:sup>\u22121<\/jats:sup>added Cd(II), while &gt;93% of Cd(II) was sequestrated in the groups with lower added concentrations of Cd(II). More than 80% of the sequestrated Cd(II) was bioadsorbed by bEPS. The Pearson correlation coefficients of exterior and interior factors related to colony formation of<jats:italic>M. aeruginosa<\/jats:italic>revealed that Cd(II) could stimulate the production of IPS and bEPS via increasing Cd(II) bioaccumulation and bioadsorption. Increased levels of cross-linking between Cd(II) and bEPS stimulated algal cell aggregation, which eventually promoted the formation of<jats:italic>Microcystis<\/jats:italic>colonies.<\/jats:p>","DOI":"10.1155\/2016\/9837598","type":"journal-article","created":{"date-parts":[[2016,9,29]],"date-time":"2016-09-29T22:15:37Z","timestamp":1475187337000},"page":"1-7","source":"Crossref","is-referenced-by-count":9,"title":["Sequestration and Distribution Characteristics of Cd(II) by<i>Microcystis aeruginosa<\/i>and Its Role in Colony Formation"],"prefix":"10.1155","volume":"2016","author":[{"given":"Xiangdong","family":"Bi","sequence":"first","affiliation":[{"name":"Key Laboratory of Pollution Processes and Environmental Criteria, College of Environmental Science and Engineering, Nankai University, Ministry of Education, Tianjin 300071, China"},{"name":"Key Laboratory of Aquatic-Ecology and Aquaculture of Tianjin, Department of Fisheries Sciences, Tianjin Agricultural University, Tianjin 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