Repository logo
  • English
  • 中文
Log In
Have you forgotten your password?
  1. Home
  2. College of Bioresources and Agriculture / 生物資源暨農學院
  3. Plant Pathology and Microbiology / 植物病理與微生物學系
  4. Taxonomy of the Lichen Genus Usnea in Taiwan
 
  • Details

Taxonomy of the Lichen Genus Usnea in Taiwan

Date Issued
2008
Date
2008
Author(s)
Shen, Yuan-Min
URI
http://ntur.lib.ntu.edu.tw//handle/246246/181916
Abstract
Taxonomy and biology of the lichen genus Usnea in Taiwan were studied based on morphological, chemical, cultural traits, and molecular analyses. We studied over 300 specimens collected from the Central Mountain Range, Snow Mountain Range, Jade Mountain Range, Ali Mountain Range and Coastal Mountain Range from 2006 to 2008. Twenty-two species were recognized, including U. aciculifera, U. baileyi, U. bismolliuscula, U. ceratina, U. cornuta, U. diffracta, U. fragilescens, U. glabrata, U. himalayana, U. longissima, U. malmei, U. masudana, U. nidifica, U. orientalis, U. pangiana, U. pectinata, U. pseudogatai, U. rubicunda, U. rubrotincta, U. shimadai, U. sinensis, and U. trichodeoides. More than 40 lichen substances were found by high performance liquid chromatography (HPLC). The chemical constitutions supported the identification of Usnea species. It was found that U. longissima had the highest usnic acid contents (3.31%). In cultural studies, the best temperature for the growth of U. orientalis was 20℃ (1.14-1.87 mm / month), and it grew better on 4% agar than on 2% agar. Adding usnic acid to the cultural media did not affect the growth of U. orientalis. Molecular analyses based on sequences of ITS (internal transcribed spacer) of ribosomal RNA genes supported the separation of U. rubicunda and U. rubrotincta. Usnea himalayana and U. nidifica could be considered conspecific due to the fact that their intermediate forms exist among our collections and that their DNA sequences were highly similar. The results also showed that U. orientalis-U. pygmoidea probably represent species pairs of teleomorph-anamorphs connection. Usnea species in Taiwan frequently grow on plants of Pinaceae (22%), Rosaceae (15%) and Betulaceae (12%). Their altitudinal distribution was within the range 800-3400 m. Usnea himalayana, U. longissima, and U. trichodeoides are distributed at higher elevations, whereas U. baileyi, U. bismolliuscula, U. pectinata, U. rubicunda, and U. rubrotincta are at lower elevations.
Subjects
Usnea
lichens
lichen substances
culture
taxonomy
phylogeny
ecology
File(s)
Loading...
Thumbnail Image
Name

ntu-97-R95633010-1.pdf

Size

23.53 KB

Format

Adobe PDF

Checksum

(MD5):9b81945232430fa9d126beb0b5ec5fc2

臺大位居世界頂尖大學之列,為永久珍藏及向國際展現本校豐碩的研究成果及學術能量,圖書館整合機構典藏(NTUR)與學術庫(AH)不同功能平台,成為臺大學術典藏NTU scholars。期能整合研究能量、促進交流合作、保存學術產出、推廣研究成果。

To permanently archive and promote researcher profiles and scholarly works, Library integrates the services of “NTU Repository” with “Academic Hub” to form NTU Scholars.

總館學科館員 (Main Library)
醫學圖書館學科館員 (Medical Library)
社會科學院辜振甫紀念圖書館學科館員 (Social Sciences Library)

開放取用是從使用者角度提升資訊取用性的社會運動,應用在學術研究上是透過將研究著作公開供使用者自由取閱,以促進學術傳播及因應期刊訂購費用逐年攀升。同時可加速研究發展、提升研究影響力,NTU Scholars即為本校的開放取用典藏(OA Archive)平台。(點選深入了解OA)

  • 請確認所上傳的全文是原創的內容,若該文件包含部分內容的版權非匯入者所有,或由第三方贊助與合作完成,請確認該版權所有者及第三方同意提供此授權。
    Please represent that the submission is your original work, and that you have the right to grant the rights to upload.
  • 若欲上傳已出版的全文電子檔,可使用Open policy finder網站查詢,以確認出版單位之版權政策。
    Please use Open policy finder to find a summary of permissions that are normally given as part of each publisher's copyright transfer agreement.
  • 網站簡介 (Quickstart Guide)
  • 使用手冊 (Instruction Manual)
  • 線上預約服務 (Booking Service)
  • 方案一:臺灣大學計算機中心帳號登入
    (With C&INC Email Account)
  • 方案二:ORCID帳號登入 (With ORCID)
  • 方案一:定期更新ORCID者,以ID匯入 (Search for identifier (ORCID))
  • 方案二:自行建檔 (Default mode Submission)
  • 方案三:學科館員協助匯入 (Email worklist to subject librarians)

Built with DSpace-CRIS software - Extension maintained and optimized by 4Science