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Response of microcystis to copper stress: do phenotypes of microcystis make a difference in stress tolerance?
Environ Pollut. 2007 May; 147(2):324-30.EP

Abstract

To elucidate the role of phenotype in stress-tolerant bloom-forming cyanobacterium Microcystis, two phenotypes of M. aeruginosa - unicellular and colonial strains were selected to investigate how they responded to copper stress. Flow cytometry (FCM) examination indicated that the percents of viable cells in unicellular and colonial Microcystis were 1.92-2.83% and 72.3-97.51%, respectively, under 0.25 mgl(-1) copper sulfate treatment for 24h. Upon exposure to 0.25 mgl(-1) copper sulfate, the activities of antioxidative enzyme, such as superoxide dismutase (SOD) and catalase (CAT), were significantly increased in colonial Microcystis compared to unicellular Microcystis. Meanwhile, the values of the photosynthetic parameters (F(v)/F(m), ETR(max), and oxygen evolution rate) decreased more rapidly in unicellular Microcystis than in colonial Microcystis. The results indicate that colonial Microcystis has a higher endurance to copper than unicellular Microcystis. This suggests that the efficient treatment concentration of copper sulfate as algaecides will be dependent on the phenotypes of Microcystis.

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Authors+Show Affiliations

Wu ZX
State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, Hubei, PR China.
Gan NQ
No affiliation info available
Huang Q
No affiliation info available
Song LR
No affiliation info available

MeSH

AntioxidantsCatalaseChlorophyllChlorophyll ACopper SulfateCulture MediaElectron TransportFlow CytometryFluorescenceMicrocystisOxidative StressPhenotypePhotosynthesisSuperoxide DismutaseWater MicrobiologyWater Pollutants, Chemical

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

16828944

Citation

Wu, Zhong-Xing, et al. "Response of Microcystis to Copper Stress: Do Phenotypes of Microcystis Make a Difference in Stress Tolerance?" Environmental Pollution (Barking, Essex : 1987), vol. 147, no. 2, 2007, pp. 324-30.
Wu ZX, Gan NQ, Huang Q, et al. Response of microcystis to copper stress: do phenotypes of microcystis make a difference in stress tolerance? Environ Pollut. 2007;147(2):324-30.
Wu, Z. X., Gan, N. Q., Huang, Q., & Song, L. R. (2007). Response of microcystis to copper stress: do phenotypes of microcystis make a difference in stress tolerance? Environmental Pollution (Barking, Essex : 1987), 147(2), 324-30.
Wu ZX, et al. Response of Microcystis to Copper Stress: Do Phenotypes of Microcystis Make a Difference in Stress Tolerance. Environ Pollut. 2007;147(2):324-30. PubMed PMID: 16828944.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Response of microcystis to copper stress: do phenotypes of microcystis make a difference in stress tolerance? AU - Wu,Zhong-Xing, AU - Gan,Nan-Qin, AU - Huang,Qun, AU - Song,Li-Rong, Y1 - 2006/07/07/ PY - 2006/04/05/received PY - 2006/05/24/accepted PY - 2006/7/11/pubmed PY - 2007/8/19/medline PY - 2006/7/11/entrez SP - 324 EP - 30 JF - Environmental pollution (Barking, Essex : 1987) JO - Environ Pollut VL - 147 IS - 2 N2 - To elucidate the role of phenotype in stress-tolerant bloom-forming cyanobacterium Microcystis, two phenotypes of M. aeruginosa - unicellular and colonial strains were selected to investigate how they responded to copper stress. Flow cytometry (FCM) examination indicated that the percents of viable cells in unicellular and colonial Microcystis were 1.92-2.83% and 72.3-97.51%, respectively, under 0.25 mgl(-1) copper sulfate treatment for 24h. Upon exposure to 0.25 mgl(-1) copper sulfate, the activities of antioxidative enzyme, such as superoxide dismutase (SOD) and catalase (CAT), were significantly increased in colonial Microcystis compared to unicellular Microcystis. Meanwhile, the values of the photosynthetic parameters (F(v)/F(m), ETR(max), and oxygen evolution rate) decreased more rapidly in unicellular Microcystis than in colonial Microcystis. The results indicate that colonial Microcystis has a higher endurance to copper than unicellular Microcystis. This suggests that the efficient treatment concentration of copper sulfate as algaecides will be dependent on the phenotypes of Microcystis. SN - 0269-7491 UR - https://www.unboundmedicine.com/medline/citation/16828944/Response_of_microcystis_to_copper_stress:_do_phenotypes_of_microcystis_make_a_difference_in_stress_tolerance L2 - https://linkinghub.elsevier.com/retrieve/pii/S0269-7491(06)00356-3 DB - PRIME DP - Unbound Medicine ER -