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Identifier 000438775
Title Μεταβολική και λειτουργική διαφοροποίηση του χλωροφύκους Chlorella vulgaris σε διαφορετικές εντάσεις φωτισμού και διαφορετικές συγκεντρώσεις CO2
Alternative Title Metabolic and functional differentiation of the green alga Chlorella vulgaris at different light intensities and different CO2 concentrations
Author Μουντουράκης, Φανούριος Ε.
Thesis advisor Κοτζαμπάσης, Κυριάκος
Reviewer Πυρίντσος, Στέργιος
Μόσχου, Παναγιώτης
Abstract In the context of the present work was studied the differentiation in the molecular structure and function of the photosynthetic apparatus of the unicellular green alga Chlorella vulgaris at different light intensities and at different extreme CO2 concentrations, in completely autotrophic conditions, aiming at the determination of optimal biomass production. The results showed that Chlorella vulgaris reaches its biomass maximum at light intensities between 50-100 μmol m-2 s-1 and a CO2 concentration of 30%. The optimal cultivation time in such systems is estimated at around 5-6 days, where we record about 400% increase in microalgal biomass, capturing extreme CO2 concentrations. In the treatments of the present work, we did not observe significant differences of lipids and carbohydrates in the biomass of the microalgae. However, the results obtained from the analysis of biomass at the end of the experimental process, showed in general an increase in lipids as the light intensity decreases (and in complete darkness) and as the CO2 concentration increases simultaneously. Carbohydrates seems to have the highest values in high light conditions (200-400 μmol m-2 s-1) and extreme CO2 concentrations (60% CO2). All of the above suggest that Chlorella vulgaris not only tolerates extreme high CO2 concentrations, but the increasing CO2 concentrations have a beneficial effect on the molecular structure and function of its photosynthetic mechanism and consequently on the increase of biomass. Therefore, it is a system with perspectives for future biotechnological and environmental applications.
Language Greek, English
Subject Biofuels
CO2 capture
CO2 stress
Chlorophyll fluoresence
Greenhouse effect
Light stress
OJIP test
Δέσμευση διοξειδίου του άνθρακα
Καταπόνηση διοξειδίου του άνθρακα
Καταπόνιση φωτισμού
Τεχνικές επαγωγικού φθορισμού χλωροφυλλών
Φαινόμενο θερμοκηπίου
Issue date 2021-03-26
Collection   School/Department--School of Sciences and Engineering--Department of Biology--Post-graduate theses
  Type of Work--Post-graduate theses
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