Taxonomic study of Anthocerotaceae (Bryophytes) in Taiwan

• Main Author: 周思妤
• Other Authors: 黃星凡
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/31773181116893067146

碩士 === 國立新竹教育大學 === 應用科學系碩士班 === 100 === Abstract There are approximately 200~250 species of hornworts around the world. In Taiwan, 14 species have been recorded. Among them, nine species in three genera belonging to Anthocerotaceae are in this study. Comparing to the other bryophyte, the studies of hornwort are quite few in Taiwan. Hence the aim of this thesis is to review the hornwort plants of Taiwan by using morphology such as the feature of thallus, capsule length and color, and by using ultrastructure such as cross-section of thallus, number of chloroplast per cells, ornamentation of spores and feature of pseudoelaters. Ornamentation of spores is a significant character for grouping of hornwort. Therefore the scanning electron microscope (SEM) photos of spores are provided. For molecular analysis, three different DNA markers : rbcL and trnL-F of chloroplast DNA, and nad5 of mitochondria DNA are selected for reconstruction of phylogeny. Other hornwort sequences deposited at NCBI database are also downloaded and integrated with my own data of Anthocerotaceae in Taiwan and also in the world. In this study, in addition to the nine recorded of Anthocerotaceae, two unknown species are added to Anthoceros and one unknown species to Folioceros. In total, 13 species have been dealt with morphology and molecular analysis respectively, including Megaceros flagellaris as outgroup. Although circumscription of genus and relationship among genera remain problematic in hornwort, Anthoceros, Folioceros and Phaeoceros can be separated by each analysis for Taiwanese Anthocerostaceae. Here I provide the morphological and molecular evidence, and hope it will be useful for further study of Taiwanese hornwort in the future.