Photosynthetic aspects and lipid profiles in the mixotrophic alga Neochloris oleoabundans as useful parameters for biodiesel production
| Autor: | Alessandra Sabia, Lorenzo Ferroni, Cecilia A. Popovich, Patricia Ines Leonardi, Costanza Baldisserotto, Martina Giovanardi, Diana Teresita Constenla, Simonetta Pancaldi |
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| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
0301 basic medicine Photoinhibition Neochloris oleoabundans Mixotrophy Photosynthetic apparatus PSII Lipid profiles Ultrastructure Photosynthetic pigment Chlorophyta Photosynthesis 01 natural sciences BIODIESEL Ciencias Biológicas 03 medical and health sciences chemistry.chemical_compound Botany NEOCHLORIS PSII Mixotrophy biology Ambientale Lipid profiles food and beverages Photosynthetic apparatus Bioquímica y Biología Molecular Neochloris oleoabundans biology.organism_classification 030104 developmental biology chemistry Ultrastructure Neochloris Biodiesel production Agronomy and Crop Science Mixotroph CIENCIAS NATURALES Y EXACTAS 010606 plant biology & botany LIPIDS |
| Popis: | Fossil fuels will be consumed in few decades, so attention is focused on renewable energy sources, among which microalgae are very promising. Neochloris oleoabundans (Chlorophyta) is one of the most interesting organisms for its capability to accumulate lipids, in particular tryacilglicerols (TAG), useful for biodiesel production, furthermore it can grow mixotrophically. The present work was focused on two basic steps of mixotrophic cultivation with glucose (late exponential -6d- and late stationary -14d- phases of growth), giving attention to relations between photosynthesis and lipid production. Results confirmed that the use of glucose induces a high biomass productivity, which is linked to a rapid replication process until 6d and to enlargement of cells at 14d. At 6d, mixotrophic cells contained numerous stromatic starch grains, while at 14d lipids were highly accumulated and starch tended to reduce. Photosynthetic pigment and protein content decreased under mixotrophy. Photoinhibition following high-light exposure was not significantly affected by mixotrophic cultivation at both experimental times. The creation of a reducing environment due to the photosynthetic activity, together with alterations of N:C ratio, promoted lipid synthesis. Neutral lipids increased under mixotrophy, being oleic acid the major component, while linolenic acid decreased; these aspects fit with requirements for biodiesel production. Fil: Baldisserotto, Costanza. Universita Di Ferrara; Italia Fil: Popovich, Cecilia Angelines. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Centro de Recursos Naturales Renovables de la Zona Semiárida. Universidad Nacional del Sur. Centro de Recursos Naturales Renovables de la Zona Semiárida; Argentina. Universidad Nacional del Sur. Departamento de Biología, Bioquímica y Farmacia; Argentina Fil: Giovanardi, Martina. Universita Di Ferrara; Italia Fil: Sabia, Alessandra. Universita Di Ferrara; Italia Fil: Ferroni, Lorenzo. Universita Di Ferrara; Italia Fil: Constenla, Diana Teresita. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Planta Piloto de Ingeniería Química. Universidad Nacional del Sur. Planta Piloto de Ingeniería Química; Argentina Fil: Leonardi, Patricia Ines. Universidad Nacional del Sur. Departamento de Biología, Bioquímica y Farmacia; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Centro de Recursos Naturales Renovables de la Zona Semiárida. Universidad Nacional del Sur. Centro de Recursos Naturales Renovables de la Zona Semiárida; Argentina Fil: Pancaldi, Simonetta. Universita Di Ferrara; Italia |
| Databáze: | OpenAIRE |
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