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http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/76377
標題: | 蕨類植物的脈相與系統演化關係之研究 A study on the relationship between venation pattern and systematic evolution of ferns in Taiwan |
作者: | Mei-Fang Kao 高美芳 |
關鍵字: | 蕨類植物,脈相,系統演化, pteridophyte,venation pattern,systematic evolution, |
出版年 : | 1998 |
學位: | 碩士 |
摘要: | 蕨類植物的脈相在屬級甚至科級是相當穩定的,脈相不僅可以顯示許多分類群間之關係,並從彼此間的變化可以看出蕨類植物平行演化的路徑。蕨類植物的脈包括遊離脈、網狀脈,並有相當多的種類同時具有網狀脈和遊離脈。隨著葉脈分叉形式的不同,?可區分成單叉、羽裂、扇型等遊離脈。而隨著葉脈連合的情形不同,所形成網眼的結構亦有所差異。由網眼的類型,大致可以將蕨類植物分成水龍骨型、貫眾蕨型、三叉蕨型、腸蕨型、鹵蕨型、新月蕨型及栗蕨型七大類。因此,根據葉脈的結構,將相互關聯遊離脈及網狀脈串連,可以發現蕨類植物有明顯不同的演化途徑。脈相對於系統關係研究之貢獻,主要在於演變路徑之推演。此外,以脈相探討蕨類植物之親緣關係時,應是屬於較低層次,如屬間的關係。 Vein patterns of ferns are highly stable at genus or family level. It reveals relation among taxa, and demonstrates parallism. Pteridophytic vein patterns include free vein, reticulate vein, and mix type. By different branch pattern, free vein is further divided into simple, pinnate, and fan-shaped types. Sometimes veins are united to form various anastomosing venation. According to the structure of areoles, anastomosing venation patterns can be divided into 7 types: Polypodium type, Cyrtomium type, Tectaria type, Diplaziopsis type, Acrostichum type, Pronephrium type, and Histiopteris type, all these types are generated by various combinations of free veins. Therefore, from vein structure, we can find there are several different evolution line of pteridophytes. The study of pteridophytic vein pattern play an important role in the investigation of evolution line. In addition, the study of systematics by vein pattern belongs to the category of lower taxonomic levels such as the genus level. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/76377 |
全文授權: | 未授權 |
顯示於系所單位: | 植物科學研究所 |
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