Revista Brasileira de Farmacognosia | |
Study on biofiltration capacity and kinetics of nutrient uptake by Gracilaria cervicornis (Turner) J. Agardh (Rhodophyta, Gracilariaceae) | |
Marcella A. A. Carneiro2  Fúlvio Aurélio De M. Freire1  Eliane Marinho-soriano2  | |
[1] ,Universidade Federal do Rio Grande do Norte Departamento de Oceanografia e Limnologia ,Brazil | |
关键词: Gracilaria; nutrient uptake; macroalgae; | |
DOI : 10.1590/S0102-695X2011005000074 | |
来源: SciELO | |
【 摘 要 】
The absorption efficiency and kinetic parameters (Vmax, Ks and Vmax:Ks) of the seaweed Gracilaria cervicornis for the nutrients NH4+, NO3- and PO4(3-) were evaluated. Absorption efficiency was measured by monitoring nutrient concentrations for 5 h in culture media with initial concentrations of 5, 10, 20 and 30µM. Kinetic parameters were determined by using the Michaelis-Menten formula. Absorption efficiencies for this algae were greater in treatments with lower concentrations, as evidenced by a reduction of 85.3, 97.5 and 81.2% for NH4+, NO3- and PO4(3-), respectively. Kinetic parameters show that G. cervicornis exhibits greater ability to take up high concentrations of NH4+ (Vmax=158.5µM g dw-1 h-1) and low concentrations of PO4(3-) (Ks=5µM and Vmax:Ks=10.3). These results suggest that this algal species has good absorption capacity for the nutrients tested and may be a promising candidate as a bioremediator of eutrophized environments.
【 授权许可】
CC BY-NC-ND
All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License
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