Research Information System
Thesis Type: Postgraduate
Institution Of The Thesis: Istanbul University, Faculty of Science, Depertment of Biology, Turkey
Approval Date: 2021
Thesis Language: Turkish
Student: Seran Kırkıncı
Supervisor: Gülriz Bayçu Kahyaoğlu
Abstract:
Due to population growth and climate change, the need for raw materials used in areas such as pharmaceuticals and biofuels is also increasing. The rapid increase in the number of microalgal cells, the abundance of important metabolites such as lipids, proteins and carbohydrates, and the use of their entire biomass are important parameters. Various studies on microalgal growth, development and increase in the amount of metabolites are carried out in order to meet the raw material need. Phytohormones are metabolites that are effective in the growth and development of higher plants and microalgae. It has been stated in various studies that exogenous phytohormone application contributes to the increase in the number of microalgal cells, biomass productivity, metabolites such as lipid, protein and carbohydrate. While there was an increase in total lipid and fatty acid contents in some microalgae cultures grown under abiotic stress conditions; number of cells, amount of biomass and photosynthesis performance may decrease. It has been stated that there is no such reduction in microalgae cultures treated with exogenous phytohormones, and therefore industrial production costs are reduced. Therefore, studies on exogenous phytohormones applied to microalgae in order to increase the production of industrially important metabolites are of great importance.
POSSIBLE EFFECTS OF STRIGOLACTONE HORMONE ON THE DEVELOPMENT OF THE MICROALGAE Scenedesmus obliquus
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In this research, it was aimed to increase algal biomass and lipid content by exogenous application of strigolactone (SL) hormone to Scenedesmus obliquus microalgae culture. GR24, the synthetic form of SL, was applied at different periods and concentrations. After hormone treatments, increases were observed in the cell number, biomass amount, chlorophyll and fatty acid content of S. obliquus. The effect of GR24 on fatty acid contents was determined by GC-MS (Gas Chromatography-Mass Spectrometry) measurements. It was determined that especially 10-6 M GR24 application increased the total fatty acid content 1.37 times compared to the control group.
In the light of the data obtained from our Thesis study, it is thought that the GR24 hormone is effective in the growth and development of S. obliquus and may form the basis for more detailed research in the future.