碩士 / 國立中興大學 / 森林學系所 / 103 / To understand the response of photosynthesis, chlorophyll fluorescence, and photoprotection strategy in Avicennia marina and Lumnitzera racemosa to temperatures, the A. marina and L. racemosa in Shuangchun, Beimen Dist., Tainan City and the A. marina in the HongMao Harbor, Sinfong Township, Hsinchu County were chosen as the sample materials in this study. The net photosynthetic rate and chlorophyll fluorescence response under 5 different conditions between 15-35oC were measured. The result showed that the A. marina and L. racemosa in Shuangchun would suffer both of the stoma and non-stoma limitation under the low temperature, and the A. marina in Sinfong would suffer the stoma limitation only. The photosynthetic light reactions based on the chlorophyll fluorescence parameters showed that the ETR, qP, ΦPSII, and Fv''/Fm'' of the 3 materials in this study all displayed the least value under 15oC with significant differences (p < 0.05) between that and other treats above 15oC. It demonstrated that the light reactions of all the 3 materials were inhibited under the low temperature. The photoinhibition acted the worst under 15oC, and the L. racemosa was affected more than the A. marina. According to the photoprotection performance, the A. marina in different habitat performed differently because of the geographic position and the natural low temperature. However, the A. marina and L. racemosa both growing in Shuangchun showed that the A. marina was more low-temperature-tolerable than the L. racemosa. The soluble protein analysis showed that the contents of soluble protein increased with the temperature decreased. There were some differences between species. The L. racemosa in Shuangchun had the most content of soluble protein under 20oC with significant differences (p < 0.05) between that and other treats above 20oC. But the A. marina in Shuangchun had the most content of soluble protein under 15oC with significant differences (p < 0.05) between that and other treats above 15oC. It demonstrated that the L. racemosa was more sensitive to the low temperature than the A. marina. Through the plant pigment analysis, it was found that the L. racemosa always had more carotenoids than the A. marina had under every treat. It showed the same trend by the NPQ of chlorophyll fluorescence. Therefore, it was supposed that the non-photochemical quenching was an important dissipation pathway to the L. racemosa.
| Identifer | oai:union.ndltd.org:TW/103NCHU5360002 |
| Date | January 2015 |
| Creators | Chun-Hao Chan, 詹鈞皓 |
| Contributors | Tien-Szu Liao, 廖天賜 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 68 |
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