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Boo, Ga Hun,Hwang, Il Ki,Ha, Dong Su,Miller, Kathy Ann,Kogame, Kazuhiro,Cho, Ga Youn,Kim, Jung Yeon,Boo, Sung Min Informa UK (TaylorFrancis) 2016 Phycologia Vol.55 No.1
<P>Four species have been described in the genus Pikea (Dumontiaceae, Gigartinales): three species from North America and one species from Japan. However, the phylogeny and species delimitation in Pikea remain poorly resolved. Here we provide both rbcL and cox1 sequences for all species of Pikea, including the type of P. pinnata and a paratype of P. robusta. Our data reveal that P. californica, P. pinnata and P. yoshizakii are distinct in both data sets, but P. robusta is synonymous with the earlier-described P. pinnata. Morphological and molecular data show that Pikea from Korea is identical to P. yoshizakii and that the previous report of P. californica in Korea is a misidentification. The genus Pikea is well resolved in the main clade of the Dumontiaceae. This is the first study on the phylogeny of Pikea using rbcL and cox1 sequence data.</P>
Boo, Ga Hun,Kim, Kyeong Mi The Korean Society of Phycology 2020 ALGAE Vol.35 No.1
Two species of the agar-yielding genus Gelidium, G. galapagense and G. isabelae, have previously been reported from Korea but their occurrence has not been confirmed with molecular data. We intensively collected samples of Gelidium from Jeju Island, where the two species were reported, and the southern coast of Korea. Phylogenetic analyses based on cox1 and rbcL sequences revealed that only a single species occurred in Korea. The Korean species was distantly related to G. galapagense and G. isabelae from the Galápagos Islands, and formed a clade with G. microdonticum, G. millarianum, and G. pakistanicum. A new species, G. palmatum, is described for those specimens that were previously recognized as either G. galapagense or G. isabelae from Korea. G. palmatum is small in size (up to 0.7 cm), with compressed, lanceolate axes, irregular, digitate to palmate branches, abundant rhizines in the medulla, tetrasporangial sori without sterile margins, and rounded bilocular cystocarps borne subapically on palmate branchlets.
Boo, Ga Hun,Robledo, Daniel,Andrade-Sorcia, Gabriella,Boo, Sung Min The Korean Society of Phycology 2018 ALGAE Vol.33 No.3
Genetic continuity of Digenea simplex outside the Atlantic waters remains less studied, despite its long exposure to oriental folk medicine and wide distribution in tropical waters. Mitochondrial COI-5P and plastid rbcL sequences and morphology were investigated for plants from Mexico and additional specimens from Japan. Two new species, Digenea mexicana and Digenea rafaelii, are described for plants that would previously have been recognized as D. simplex in Mexico. D. mexicana grows to 10.5 cm tall and has cylindrical axes, irregular or di-, trichotomous branches, simple to branched determinate branchlets with eight pericentral cells, and tetrasporangia on inflated upper parts of determinate branchlets. It occurs intertidally in Quintana Roo, Yucatan Peninsula. D. rafaelii grows to 5 cm tall and has cylindrical axes, irregular or di-, trichotomous branches, and simple determinate branchlets with ten pericentral cells. It occurs intertidally in the Gulf of California. Both COI-5P and rbcL sequences revealed the genetic discontinuity between D. mexicana and D. rafaelii.
Ga Hun Boo,Daniel Robledo,Gabriella Andrade-Sorcia,부성민 한국조류학회I 2018 ALGAE Vol.33 No.3
Genetic continuity of Digenea simplex outside the Atlantic waters remains less studied, despite its long exposure to oriental folk medicine and wide distribution in tropical waters. Mitochondrial COI-5P and plastid rbcL sequences and morphology were investigated for plants from Mexico and additional specimens from Japan. Two new species, Digenea mexicana and Digenea rafaelii, are described for plants that would previously have been recognized as D. simplex in Mexico. D. mexicana grows to 10.5 cm tall and has cylindrical axes, irregular or di-, trichotomous branches, simple to branched determinate branchlets with eight pericentral cells, and tetrasporangia on inflated upper parts of determinate branchlets. It occurs intertidally in Quintana Roo, Yucatan Peninsula. D. rafaelii grows to 5 cm tall and has cylindrical axes, irregular or di-, trichotomous branches, and simple determinate branchlets with ten pericentral cells. It occurs intertidally in the Gulf of California. Both COI-5P and rbcL sequences revealed the genetic discontinuity between D. mexicana and D. rafaelii.
Boo, Ga Hun,Cai, Yixiong,Kim, Jung Yeon,Boo, Sung Min Walter de Gruyter GmbH 2015 Botanica marina Vol.58 No.6
<B>Abstract</B><P>Plants of the red algal genus</P>
Boo, Ga Hun,Le Gall, Line,Miller, Kathy Ann,Freshwater, D. Wilson,Wernberg, Thomas,Terada, Ryuta,Yoon, Kyung Ju,Boo, Sung Min Academic Press 2016 Molecular phylogenetics and evolution Vol.101 No.-
<P><B>Abstract</B></P> <P>Although the Gelidiales are economically important marine red algae producing agar and agarose, the phylogeny of this order remains poorly resolved. The present study provides a molecular phylogeny based on a novel marker, nuclear-encoded <I>Ces</I>A, plus plastid-encoded <I>psa</I>A, <I>psb</I>A, <I>rbc</I>L, and mitochondria-encoded <I>cox</I>1 from subsets of 107 species from all ten genera within the Gelidiales. Analyses of individual and combined datasets support the monophyly of three currently recognized families, and reveal a new clade. On the basis of these results, the new family Orthogonacladiaceae is described to accommodate <I>Aphanta</I> and a new genus <I>Orthogonacladia</I> that includes species previously classified as <I>Gelidium madagascariense</I> and <I>Pterocladia rectangularis</I>. <I>Acanthopeltis</I> is merged with <I>Gelidium</I>, which has nomenclatural priority. Nuclear-encoded <I>Ces</I>A was found to be useful for improving the resolution of phylogenetic relationships within the Gelidiales and is likely to be valuable for the inference of phylogenetic relationship among other red algal taxa.</P> <P><B>Highlights</B></P> <P> <UL> <LI> A comprehensive molecular phylogeny of 107 species in ten genera of the Gelidiales is provided for the first time. </LI> <LI> Nuclear <I>Ces</I>A is an informative molecular marker for the phylogeny of the Gelidiales. </LI> <LI> Multi-gene phylogenies (including 5 markers) improve resolution of phylogenetic relationships in the Gelidiales. </LI> <LI> A new genus and a new family are described: <I>Orthogonacladia</I> gen. nov. and Orthogonacladiaceae fam. nov. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
Pterocladiella maribagoensis (Gelidiales, Rhodophyta), a new marine alga from Cebu, Philippines
BOO, GA HUN,GERALDINO, PAUL JOHN L. Magnolia Press 2016 Phytotaxa Vol.288 No.3
<P>A new species of marine gelidioid red algae, Pterocladiella maribagoensis, is described and illustrated. Pterocladiella maribagoensis is distinguished by small, terete to compressed thalli with alternate or irregular branches, peg-like haptera, rhizines in medulla, and tetrasporangial sori without sterile margin at the terminal of branches. Analyses of both mitochondrial cox1 and plastid rbcL sequences revealed that P. maribagoensis was distinct from other species of Pterocladiella and clustered with P. australafricanensis, P. beachiae, P. caerulescens, P. phangiae, and P. psammophila. Morphological differences between P. maribagoensis and similar species are presented.</P>