Abstract
In order to explore the growth inhibition and physiological responses of unicellular and colonial Microcystis aeruginosa during coexistence with Acorus calamus, algal densities, chlorophyll a contents, exopolysaccharide (EPS) concentrations, malondialdehyde (MDA) contents, catalase (CAT) activities, and peroxidase (POD) activities of the two algae strains were analyzed. Although the unicellular and colonial strains of M. aeruginosa were both inhibited by A. calamus, unicellular algae were more sensitive than the colonial algae. The measurement results for EPS, MDA, CAT, and POD showed that unicellular M. aeruginosa had higher levels of stress related damage than colonial strains when they were exposed to the same density of A. calamus, and the cellular defense system of colonial M. aeruginosa was stronger than that of unicellular M. aeruginosa. Natural blooms of Microcystis are typically composed of colonial forms of M. aeruginosa, therefore future efforts to control such blooms, possibly through the development of new algicides, should focus on the unique characteristics of colonial M. aeruginosa strains.
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Acknowledgments
This work was supported by grants from the National Science Fund of China (51008265, 51468066), the Science and Technology Program of Yunnan Province, China (2014FB105), and the Program for Science Research of the Yunnan Educational Committee (2013Y352).
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Zhang, SH., Chang, JJ., Cao, JY. et al. Comparative Studies on Growth and Physiological Responses of Unicellular and Colonial Microcystis aeruginosa to Acorus calamus . Bull Environ Contam Toxicol 94, 225–231 (2015). https://doi.org/10.1007/s00128-014-1424-1
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DOI: https://doi.org/10.1007/s00128-014-1424-1