碩士 / 國立東華大學 / 海洋生物研究所 / 107 / Following the change in the illumination, the coral symbiotic algae showed a corresponding change. For instance, strongly illuminating causes an increased production of reactive oxygen species in the photosystem of symbiotic algae to increase the oxidative stress and thus trigger the antioxidant regulations for avoiding or reducing the cell oxidative damage. Membrane lipids constitute the basic structural element to create cell a dynamic structure according to the circumstance. Facing the different situation, the cell should meet the physiological needs by adjusting the membrane lipid composition to mold the suitable membrane characteristics. Therefore, this study hypothesizes that the membrane lipid composition will be changed in the coral symbiotic algae to meet the photophysiological requirements following a diurnal variation of illumination. This study investigates the diurnal changes of glycerophosphocholine (GPC) profile in the symbiotic algae of the coral Seriatopora caliendrum using a lipidomic methodology. The results showed that the sunlight induces an increase of lyso-GPCs and docosahexaenoic acid-possessing GPCs and a decrease of arachidonic acid-possessing GPCs during Illuminance increases (at time point 9:00 vs. 6:00). In addition, a high correlation between the daily light integral and the lipid variation in the symbiotic algae shows during daytime. The ratio of docosahexaenoic acid-possessing GPCs negatively correlates with the daily light integral as one of the major features. During the night times (18:00-00:00), the lipid composition shows an insignificant change in the symbiotic algae. However, this night feature of lipid profile is clearly different from that at daybreak (6:00). Based on the obtained results, the relevance of lipid metabolism to the photophysiology of coral symbiotic algae was thus interpreted to be related to photoinduced physiology and the mechanism of light adaptation.
| Identifer | oai:union.ndltd.org:TW/107NDHU5277006 |
| Date | January 2019 |
| Creators | Wu-Cheng Weng, 翁宇成 |
| Contributors | Chuan-Ho Tang, 唐川禾 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 58 |
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