High species diversity and contrasting trophic strategy evolution in the Cyanidiales (Rhodophyta) revealed by multi-locus phylogeny

碩士 === 東海大學 === 生命科學系 === 107 === The extremophilic red algae, Cyanidiales, have long attracted many research attentions due to their highly potential biotechnological applications. Although high genetic diversity has been previously revealed, a further systematic taxonomic re-examination with a mor...

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Main Authors: HUANG, TZU-YEN, 黃子晏
Other Authors: LIU, SHAO-LUN
Format: Others
Language:en_US
Published: 2019
Online Access:http://ndltd.ncl.edu.tw/handle/b4b8db
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spelling ndltd-TW-107THU001120192019-10-26T06:23:55Z http://ndltd.ncl.edu.tw/handle/b4b8db High species diversity and contrasting trophic strategy evolution in the Cyanidiales (Rhodophyta) revealed by multi-locus phylogeny HUANG, TZU-YEN 黃子晏 碩士 東海大學 生命科學系 107 The extremophilic red algae, Cyanidiales, have long attracted many research attentions due to their highly potential biotechnological applications. Although high genetic diversity has been previously revealed, a further systematic taxonomic re-examination with a more comprehensive taxon sampling is still largely unexplored. To this end, I re-examined their taxonomy and species diversity with the integration of morphological, physiological, and multilocus evidence based on 21 strains distributed around the world. Using seven genetic markers from plastid (psaA, psbA, rpoC1, dnaK, and rbcL) and mitochondrion (cox1 and cox2) for phylogenetic analyses, my study revealed at least 15 species in Cyanidiales that has been previously overlooked. Combining morphological (length, width, cell size, and the number of endospore), physiological (the effect of light and exogenous glucose on the growth rate and lipid content), and ecological features (the occurred microhabitats), my study showed that (1) Galdieria maxima should be transferred to the genus Cyanidioschyzon as Cd. maximum (Sentova) Huang et Liu comb. nov.; (2) all commonly used taxonomic characters failed for the species identification without the molecular assistance. With a better understanding of the taxonomic diagnosis in Cyanidiales, this study not only molecularly revealed their hidden cryptic species, but also provides more phenotypic information that further future taxonomic works in Cyanidiales. LIU, SHAO-LUN 劉少倫 2019 學位論文 ; thesis 52 en_US
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description 碩士 === 東海大學 === 生命科學系 === 107 === The extremophilic red algae, Cyanidiales, have long attracted many research attentions due to their highly potential biotechnological applications. Although high genetic diversity has been previously revealed, a further systematic taxonomic re-examination with a more comprehensive taxon sampling is still largely unexplored. To this end, I re-examined their taxonomy and species diversity with the integration of morphological, physiological, and multilocus evidence based on 21 strains distributed around the world. Using seven genetic markers from plastid (psaA, psbA, rpoC1, dnaK, and rbcL) and mitochondrion (cox1 and cox2) for phylogenetic analyses, my study revealed at least 15 species in Cyanidiales that has been previously overlooked. Combining morphological (length, width, cell size, and the number of endospore), physiological (the effect of light and exogenous glucose on the growth rate and lipid content), and ecological features (the occurred microhabitats), my study showed that (1) Galdieria maxima should be transferred to the genus Cyanidioschyzon as Cd. maximum (Sentova) Huang et Liu comb. nov.; (2) all commonly used taxonomic characters failed for the species identification without the molecular assistance. With a better understanding of the taxonomic diagnosis in Cyanidiales, this study not only molecularly revealed their hidden cryptic species, but also provides more phenotypic information that further future taxonomic works in Cyanidiales.
author2 LIU, SHAO-LUN
author_facet LIU, SHAO-LUN
HUANG, TZU-YEN
黃子晏
author HUANG, TZU-YEN
黃子晏
spellingShingle HUANG, TZU-YEN
黃子晏
High species diversity and contrasting trophic strategy evolution in the Cyanidiales (Rhodophyta) revealed by multi-locus phylogeny
author_sort HUANG, TZU-YEN
title High species diversity and contrasting trophic strategy evolution in the Cyanidiales (Rhodophyta) revealed by multi-locus phylogeny
title_short High species diversity and contrasting trophic strategy evolution in the Cyanidiales (Rhodophyta) revealed by multi-locus phylogeny
title_full High species diversity and contrasting trophic strategy evolution in the Cyanidiales (Rhodophyta) revealed by multi-locus phylogeny
title_fullStr High species diversity and contrasting trophic strategy evolution in the Cyanidiales (Rhodophyta) revealed by multi-locus phylogeny
title_full_unstemmed High species diversity and contrasting trophic strategy evolution in the Cyanidiales (Rhodophyta) revealed by multi-locus phylogeny
title_sort high species diversity and contrasting trophic strategy evolution in the cyanidiales (rhodophyta) revealed by multi-locus phylogeny
publishDate 2019
url http://ndltd.ncl.edu.tw/handle/b4b8db
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AT huángziyàn highspeciesdiversityandcontrastingtrophicstrategyevolutioninthecyanidialesrhodophytarevealedbymultilocusphylogeny
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