高文媛2006-07-252018-07-062006-07-252018-07-062005http://ntur.lib.ntu.edu.tw//handle/246246/10299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.application/pdf197768 bytesapplication/pdfzh-TW國立臺灣大學生命科學系固有種光合作用碳穩定性同位素比值endemic speciesphotosynthetic pathwaystable carbon isotope ratioreporthttp://ntur.lib.ntu.edu.tw/bitstream/246246/10299/1/932621B002019.pdf