Assessing the impact of sulfur concentrations on growth and biochemical composition of three marine microalgae
Autor: | Igor Fernandes, Tomásia Fernandes, Nereida Cordeiro, Carlos Andrade |
---|---|
Jazyk: | angličtina |
Rok vydání: | 2020 |
Předmět: |
0106 biological sciences
chemistry.chemical_element Plant Science Aquatic Science 01 natural sciences chemistry.chemical_compound Faculdade de Ciências Exatas e da Engenharia Nutrient Biochemical composition Food science Isochrysis Nannochloropsis gaditana chemistry.chemical_classification biology 010604 marine biology & hydrobiology Isochrysis sp biology.organism_classification Sulfur Nitrogen Rhodomonas marina chemistry Arachidonic acid Stoichiometry 010606 plant biology & botany Polyunsaturated fatty acid |
Zdroj: | Repositório Científico de Acesso Aberto de Portugal Repositório Científico de Acesso Aberto de Portugal (RCAAP) instacron:RCAAP |
Popis: | The elemental stoichiometry, growth and biochemical composition of Nannochloropsis gaditana, Rhodomonas marina and Isochrysis sp. were studied in batch cultures against different nitrogen and sulfur molar ratios (N:S) imposed in their surroundings. In N. gaditana, treatments with low N:S lead to an increase in carbon:sulfur (C:S) and N:S molar ratios up to 95 and 81%, respectively. This was reflected in lipid and protein contents which increased up to 67 and 55%, respectively. Moreover, polyunsaturated fatty acids, as well as its precursors, increased in low N/S treatments. In R. marina, the treatments applied promptly the decrease of both C:S and N:S ratios to 70 and 68%, respectively. Nevertheless, eicosapentaenoic:arachidonic acid ratio increased with N:S treatments by three and a half fold. In Isochrysis sp., the elemental stoichiometry was constrained against treatments until the highest sulfur input. Overall, sulfur supply highlighted microalgae taxonomic differences and suggested that biochemical control is required, even in nutrient replete conditions, to fully exploit their potential as added value biomachineries. |
Databáze: | OpenAIRE |
Externí odkaz: |
načítá se...