Effects of sodium sulfate on the freshwater microalga Chlamydomonas moewusii : implications for the optimization of algal culture media
| Autor: | Enrique Torres, Julio Abalde, Roi Mera |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Chlorophyll
0106 biological sciences Microorganism chemistry.chemical_element Fresh Water Aquaculture Plant Science 010501 environmental sciences Aquatic Science Models Biological 01 natural sciences chemistry.chemical_compound Nutrient Sodium sulfate Microalgae Sulfate 0105 earth and related environmental sciences biology Sulfates Phosphorus Chlamydomonas Osmolar Concentration biology.organism_classification Sulfur Culture Media Kinetics chemistry Biochemistry Ionic strength Environmental chemistry 010606 plant biology & botany |
| Zdroj: | Journal of Phycology. 52:75-88 |
| ISSN: | 0022-3646 |
| Popis: | The study of the microalgal growth kinetics is an indispensable tool in all fields of phycology. Knowing the optimal nutrient concentration is an important issue that will help to develop efficient growth systems for these microorganisms. Although nitrogen and phosphorus are well studied for this purpose, sulfur seems to be less investigated. Sulfate is a primary sulfur source used by microalgae; moreover, the concentration of this compound is increasing in freshwater systems due to pollution. The aim of this study was to investigate the effects of different sodium sulfate concentrations in the culture medium on growth and growth kinetics of the freshwater microalga Chlamydomonas moewusii. Production of biomass, chl content, kinetic equations, and a mathematical model that describe the microalgal growth in relation with the concentration of sodium sulfate were obtained. The lowest concentration of sodium sulfate allowing optimal growth was 0.1 mM. Concentrations higher than 3 mM generated a toxic effect. This work demonstrates that this toxic effect was not directly due to the excess of sulfate ion but by the elevation of the ionic strength. An inhibition model was successfully used to simulate the relationship between specific growth rate and sodium sulfate in this microalga. |
| Databáze: | OpenAIRE |
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