Differential strain response in alkaline phosphatase activity to available phosphorus in Microcoleus autumnalis |
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| Institution: | 1. School of Biological Sciences, Victoria University of Wellington, PO Box 600, Wellington 6140, New Zealand;2. Cawthron Institute, Private Bag 2, Nelson 7042, New Zealand;1. Area de Limnología Aplicada y Calidad de Agua. Centro de La Región Semiárida. Instituto Nacional Del Agua. Córdoba, Argentina;2. Facultad de Ciencias Químicas. Universidad Católica de Córdoba, Argentina;3. Facultad de Ciencias de La Salud. Universidad Católica de Córdoba, Argentina;4. L I I D O. Laboratorio de Inmunopatología. Córdoba, Argentina;1. Institute of Hydrobiology, Jinan University, Guangzhou, Guangdong, China;2. Center for Fundamental and Applied Microbiomics, Biodesign Institute, Arizona State University, Tempe, AZ 85287, USA;3. College of Computer Science and Technology, Jilin University, Jilin, Changchun 100012, China;4. College of Pharmacy, Beihua University, Jilin, Changchun 132013, China;5. US EPA ORD, Cincinnati, OH 45268, USA;6. College of Health Solutions, Arizona State University, Scottsdale, AZ 85259, USA;1. Unidade Acadêmica de Garanhuns, Universidade Federal Rural de Pernambuco, Av. Bom Pastor s/n, CEP 55292-270 Garanhuns, PE, Brazil;2. Programa de Pós-Graduação em Ecologia, Universidade Federal Rural de Pernambuco, R. D. Manoel de Medeiros, S/N Dois Irmãos, 52171-030 Recife, PE, Brazil;3. Unversidade Estadual Paulista Júlio de Mesquita Filho, Departamento de Zoologia e Botânica, R. Cristóvão Colombo 2265, 15054-000 São José do Rio Preto, SP, Brazil;4. Organização Pan-Americana da Saúde (OPAS)/Fundacao Nacional de Saude (FUNASA), Av. Conselheiro Rosa e Silva 1489, CEP 52050-020 Recife, PE, Brazil;5. Departamento de Ciências Biológicas, Escola Superior de Agricultura Luiz de Queiroz, Universidade de São Paulo, Av. Pádua Dias 11, CEP 13.418-900 Piracicaba, SP, Brazil;1. Department of Geology, School of Mines, Federal University of Ouro Preto - UFOP, Ouro Preto, MG, Brazil;2. National Observatory, ON, Rio de Janeiro, Brazil;3. Department of Geology, State University of Rio de Janeiro - UERJ, Rio de Janeiro, RJ, Brazil;1. Australian Rivers Institute, Griffith University, Nathan, 4111 Queensland, Australia;2. Department of Earth and Environmental Sciences, and the Lamont-Doherty Earth Observatory, Columbia University, Palisades NY, 10964, USA;1. Southern California Coastal Water Research Project, 3535 Harbor Blvd., Suite 110, Costa Mesa, CA 92626, USA;2. California State University San Marcos, 333 S. Twin Oaks Valley Rd., San Marcos, CA 92096, USA;3. University of California, Santa Cruz, 1156 High Street, Santa Cruz, CA 95064, USA;4. San Diego Regional Water Quality Control Board, 2375 Northside Dr., Suite 100, San Diego, CA 92108, USA |
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| Abstract: | Toxic, benthic cyanobacterial proliferations have increased in frequency and severity globally and can have negative impacts on aquatic ecosystems, recreation and human health. Microcoleus autumnalis has been associated with numerous animal fatalities and is causing increasing concern. It tends to grow in systems with moderate dissolved inorganic nitrogen and very low dissolved reactive phosphorus. Acquisition of nutrients, particularly phosphorus, from organic sources may explain how M. autumnalis can reach the high biomass in these relatively nutrient deplete environments. In the present study the effect of phosphorus concentration and source on alkaline phosphatase activity was investigated in toxic and non-toxic M. autumnalis strains. Toxic strains exhibited significantly higher alkaline phosphatase activity than non-toxic strains (p < 0.05), and alkaline phosphatase activity increased in all strains under phosphorus-depleted conditions (p < 0.05). Alkaline phosphatase activity was also present in environmental M. autumnalis mats, though at lower levels than in laboratory experiments. The presence of alkaline phosphatase activity indicates that the acquisition of phosphorus from organic phosphorus sources may contribute to the ability of M. autumnalis to grow in systems with low dissolved reactive phosphorus. |
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| Keywords: | Anatoxin-a Benthic Cyanobacteria Nutrients |
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