碩士 / 中國醫藥大學 / 生態暨演化生物學研究所 / 98 / High elevation of sub-tropical Taiwan have cool summer and warm winter compared with temperature and subarctic regions. In order to understand the response of photosystem Ⅱ efficiency (ΦPSⅡ) to variable temperature and light intensity, as well as the response of O2 evolution to temperature of microalgae, in this study, we selected five lakes, i.e. : Chung-Hsing Lake (70 m a.s.l.), Riyun Lake (78 m a.s.l.), Yuan-Yang Lake (YYL, 1670 m a.s.l.), Emerald Peak Lake (1840 m a.s.l.), Tianchi (2620 m a.s.l.) to study the chlorophyll fluorescence and O2 evolution of the different photosynthetic photon flux density (PPFD) and variable temperature from July 2009 to February 2010. Results indicated that ΦPSⅡ of microalgae decreased curve-linearly with increasing irradiance, and this decrease was more drastic under low temperature and high irradiance. Light response curve of ΦPSⅡof the multiple regression equations for the five lakes at different altitudes could to estimate the ΦPSⅡ of microalgae. In the same season, the ΦPSⅡ of microalgae would down-regulation at high temperatures that is easier at low altitudes than at high altitudes, the decline of slope is strong. At low temperatures and high altitudes, ΦPSⅡ of microalgae decreased faster, and then decrease the photosynthetic efficiency to reduce the damage of excess energy of light. The electron transport rate (ETR) of microalgae to different seasons and variable temperature decreased curve - exponentially with increasing irradiance, and it gradually decreases the rate when the PPFD increased.
Results of O2 evolution indicated that sample from three temperatures, the O2 evolution increased curve-linearly with PPFD increased. Respiratory rate of microalgae generally decreased with altitude, low elevation showed lower Q10. Indicating that respiration of microalgae grown at low elevation of sub-tropical Taiwan was lower sensitivity to high temperature. ETR increased linearly with increasing O2 evolution when PPFD increased. Tianchi、Emerald Peak Lake and Chung-Hsing Lake showed the similar trend in all seasons. Yuan-Yang Lake and Riyun Lake were difference in seasonal and temperature.
| Identifer | oai:union.ndltd.org:TW/098CMCH5110012 |
| Date | January 2010 |
| Creators | Shi-Xun Lin, 林士勛 |
| Contributors | Jen-Hsien Weng, 翁仁憲 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 63 |
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