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Title Μελέτη της επίδρασης της πηγής άνθρακα στην ανάπτυξη, την φωτοσυνθετική δραστηριότητα και το βιοχημικό περιεχόμενο ενός απομονωμένου στελέχους Chlorella sp.
Alternative Title Study of the effect of carbon substrate on the growth, photosynthetic activity and biochemical content of an isolated Chlorella sp strain
Author Χρονάκης, Γεώργιος
Thesis advisor Γανωτάκης, Δημήτριος
Abstract The subject of this thesis is the study of the effect of different carbon sources (glucose, galactose, fructose, maltose, mannitol, lactose, sucrose, and sorbitol) on the growth, photosynthetic activity, and biochemical content of a photosynthetic microalga of the genus Chlorella, isolated from the eutrophic river Giofyros located in Heraklion, Crete. In the first part of this study, it was found that both the type and quantity of organic substrate as well as the growth mode have a direct impact on the growth and photosynthetic ability of the microalgae. Specifically, the Chlorella strain exhibited high cellular biomass when grown under mixotrophic conditions and in cultures with glucose, maltose, and sucrose as organic carbon sources within concentrations ranging from 150 to 200 mM. Conversely, photosynthetic activity was significantly higher in cultures where autotrophic conditions prevailed or where the organic carbon source was present at low concentrations (50-100 mM). In the second part, the above samples were used to analyze the biochemical composition of Chlorella cells. The microalga showed higher content of sugars and chlorophylls under autotrophic conditions, indicating remarkable photosynthetic activity. On the other hand, cultures grown under mixotrophic conditions demonstrated that the organic substrate affects the biochemical composition of the cells, causing a decrease in sugars and an increase in lipids. The results of this study can be used as a reference for improving the cultivation techniques of the microorganism according to its intended use (biofuel, dietary supplement, and means for bioremediation).
Language Greek
Subject Biomass
Carbon source
Microalgae
Photosynthetic capacity
Βιομάζα
Μικροφύκη
Φωτοσυνθετική ικανότητα
Issue date 2024-03-21
Collection   School/Department--School of Sciences and Engineering--Department of Chemistry--Graduate theses
  Type of Work--Graduate theses
Permanent Link https://elocus.lib.uoc.gr//dlib/3/f/7/metadata-dlib-1709537397-698447-4325.tkl Bookmark and Share
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