https://scholars.lib.ntu.edu.tw/handle/123456789/136156
Title: | 台灣固有植物光合作用多樣性研究 | Authors: | 高文媛 | Keywords: | 固有種;光合作用;碳穩定性同位素比值;endemic species;photosynthetic pathway;stable carbon isotope ratio | Issue Date: | 2005 | Publisher: | 臺北市:國立臺灣大學生命科學系 | Abstract: | 台灣因為環境特殊,造就很高的植物多樣性,其中固有種更高達1067 種,有些 固有種其分布相當廣泛,其他固有種的分布範圍則變異很大。預期這些固有種 其光合作用特性也會有相當的變化,並具有不同適應機制。穩定性同位素技術 已逐漸成為生物學者用以探討生物體生化、生理、代謝活性和自然界物質循環 等方面研究的有力工具。其中穩定性碳同位素分析技術已普遍被應用在探討植 物的光合特性,例如植物所行的光合作用途徑。本研究長期目標在探討台灣固 有種植物其光合作用之多樣性。本計畫初步分析固有種穩定性碳同位素比值, 以survey 台灣固有植物其光合作用途徑。已分析之固有種其穩定性碳同位素比 值(13C)介於-34.5 to –10.8 ‰。大致可分為三群:其中一群13C 值介於-34.5 to –25.1 ‰,屬於C3 植物範圍;另一群13C 值介於-14.8 to –10.8 ‰,屬於C4 植物範圍;有二蘭科固有種(Bulbophyllum albociliatum and B. melanoglossum)其 13C 值分別為-20.2 ‰, -21.6 ‰,應該是屬於CAM 植物範圍。 Recently, carbon isotope ratio analyses have shown great promise for use as a tool to understand integrated plant behavior. For example, analysis of 13C ratio of plants has been widely used to identify photosynthetic pathways and to compare the long-term photosynthetic water use efficiency. There are 1067 species of endemic plants in Taiwan. Their photosynthetic performance has not been thoroughly characterized. Thus, the long-term goal of my study is to understand the photosynthetic characteristics of these endemic plants, especially those distributing at high elevations. In this preliminary study, the 13C of endemic plants were analyzed. The specific objective was to determine the presence and abundance of C3, C4 and CAM photosynthetic pathways in endemic plants. The 13C values of samples analyzed vary from -34.5 to -10.8 ‰ which can be classified into three groups. One group of samples had 13C values between -34.5 to –25.1 ‰, indicating C3 plants, samples in the 2nd group between -14.8 to –10.8 ‰, indicating C4 plants, and those of the 3rd group, Bulbophyllum albociliatum and B. melanoglossum, were -20.2 and -20.6 ‰, indicating CAM plants. |
URI: | http://ntur.lib.ntu.edu.tw//handle/246246/10299 | Other Identifiers: | 932621B002019 | Rights: | 國立臺灣大學生命科學系 |
Appears in Collections: | 生命科學系 |
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932621B002019.pdf | 193.13 kB | Adobe PDF | View/Open |
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