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양미연,김명숙 한국조류학회I 2017 ALGAE Vol.32 No.2
The genera Hypnea and Calliblepharis of the family Cystocloniaceae are discriminated by their female reproductivestructure, especially in the formation of carposporangia and gonimoblasts. Hypnea saidana, once classified based onobsolete evidence, has not been studied phylogenetically using molecular analysis and detailed reproductive structurethough it shares many morphologic features with the genus Calliblepharis. To provide better understanding of genericrelationship of H. saidana with Hypnea and Calliblepharis, we carried out molecular analyses using the nuclear-encodedsmall subunit ribosomal DNA (SSU) and chloroplast-encoded large subunit of the RuBisCO (rbcL), and exact morphologicalobservations focusing on the reproductive structures of wild specimens. Our molecular phylogeny showed thatH. saidana is closely related to Calliblepharis, but distinct from the clade of Hypnea. Female reproductive structure ofH. saidana characterized by upwardly developing chains of carposporangia, central reticulum of cell, and gonimoblastfilaments not connected to the pericarp provides definite evidence to assign the taxonomic position of this species toCalliblepharis. Based on our combined molecular and morphological analyses, we have proposed Calliblepharis saidanacomb. nov., expanding the distribution of Calliblepharis habitat from the eastern Atlantic South Africa, the northern IndianOcean, Australasia, and Brazil to the western Pacific Ocean.
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양미연,김명숙 한국유전학회 2015 Genes & Genomics Vol.37 No.9
The family Gracilariaceae contains economically important seaweeds and is well known as a difficult group for the species identification due to its high species diversity and uncertainty of species limits. To date, molecular studies of the Gracilariaceae in the Asia–Pacific region have been insufficient to determine the distribution and diversity of species. To acquire a better understanding of the species boundary and species diversity, we analyzed mitochondrial COI as DNA barcoding marker and plastid rbcL genes for specimens from the Asia–Pacific region. A total of 22 species has been recognized as a distinct entity including five unidentified and two new distribution records. COI sequence data showed more variation than rbcL data, enabling the clear discrimination of species. The range of intra- and inter-specific divergence for COI was 0–2.6 % (except 4.4 %) and 2.8–15.7 %, respectively. RbcL data showed the interspecific divergences ranged from 1.1 to 14.8 % and divided into two large clades, such as Gracilaria sensu lato and Gracilariopsis. The regional study allowed us to get the information of the geographic distribution of two species, Gracilariopsis chiangii from Taiwan and Hydropuntia perplexa from Australia, and reported for the first time their presence in Okinawa, Japan. The database of the Gracilariaceae has potential to speed up the identification of species diversity.
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양미연,Young Ho Koh,Myung Sook Kim 한국생태학회 2015 Journal of Ecology and Environment Vol.38 No.4
We report the first finding of Halarachnion parvum and Champia lubrica from Korea based on morphology and the plastid rbcL sequence analyses. H. parvum occurs in the subtidal zone of Munseom, the southern part of Jeju. Thalli have short stipe, and elliptical to ovate fronds with marginal proliferations of up to 3 cm in height. H. parvum has zonately divided tetrasporangia and cystocarp immersed under the cortical layer. Champia lubrica appears in Namhae, Gyeongnam and Seopseom, Jeju. Thalli are erect, irregularly branched, terete, obtuse apex, up to 3–5 cm high, and have tetrahedrally divided tetrasporangia. Molecular analyses of the plastid rbcL gene reveal that two species are clearly separated from other species of their respective genera. H. parvum is sister with Halarachnion latissimum in 3.1–3.2% sequence divergence, and C. lubrica is closely related to the sample from Japan with 0.2% sequence divergence.
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양미연,김명숙 한국생태학회 2014 Journal of Ecology and Environment Vol.37 No.4
We propose Cryptonemia asiatica sp. nov. from Korea and Japan. We used molecular analyses of plastid-encoded rbcLand morphological observations to resolve the taxonomic identities of C. lactuca from Korea, C. luxurians from Japan,and C. seminervis from Spain. Specimens of C. lactuca and C. luxurians fell within the same molecular phylogenetic clade(with 100% bootstrap support) and were clearly separated from specimens of C. luxurians collected from the type localityin Brazil. Our analyses demonstrated identical molecular sequences between C. seminervis specimens from Spain andC. lomation specimens from France. Morphological characteristics of the new species, C. asiatica include prominentmidribs through the mid thallus, a cortex 4–6 cells thick, and a blade with undulate margins. Molecular evidence indicatesthat specimens from Korea and Japan previously assigned to C. lactuca and C. luxurians, respectively, should bereassigned to Cryptonemia asiatica. Binomial C. luxurians from Brazil should be resurrected as the independent speciesof Cryptonemia.
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Taxonomic notes on five species of Gracilariaceae from Hainan, China
양미연,Jun-De Dong,김명숙 한국조류학회I 2012 ALGAE Vol.27 No.3
Hainan is the second largest and southernmost island of China, and it harbors many species of the family Gracilariaceae. In this study, we conducted molecular and morphological analyses of gracilarian specimens collected from Hainan Island, to clarify their taxonomic identity and phylogenetic relationships. Five species of Gracilariaceae in Hainan were determined through maximum likelihood and Bayesian analysis of rbcL sequence data. Based on the phylogenetic trees and morphology, Hainan specimens were identified as three species of Gracilaria, one species of Gracilariopsis, and one species of Hydropuntia, namely, G. salicornia, G. tenuistipitata, Gracilaria sp., Gp. bailiniae and H. edulis. This is the first report of the molecular phylogeny of Gracilariaceae on Hainan Island, and it helps to clarify the taxonomy and distribution of gracilarian species in the Asia-Pacific region.
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심부전 악화로 사망한 대유행 인플루엔자(H1N1 2009) 1예
양미연,박정환,이윤나,임재희,이은정,전민혁,김태형,추은주 대한감염학회 2010 Infection and Chemotherapy Vol.42 No.2
On April, 2009, pandemic influenza (H1N1 2009) emerged in the United States at first. Clinical outcomes of this infection are reported as ranging from self-limited illness to respiratory failure or death. There were more than 250 deaths due to pandemic influenza until March 2010. Influenza-related deaths occurred in the elderly and in patients with underlying medical conditions. Most of the critically ill patients showed severe hypoxia and acute respiratory distress syndrome and required ventilator care. We experienced a 70-year-old man presenting with pandemic influenza (H1N1 2009) with heart failure. He was treated with antival agents, ventalator and extracorporeal membrane oxygenation. But his heart function was aggravared and resulted in his death.
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양미연,김명숙 한국해양과학기술원 2016 Ocean science journal Vol.51 No.3
Determining the taxonomic status of the red algal genus Chondracanthus based on morphological characters is challenging due to the similarity and high degree of plasticity of the thallus. Since the taxonomic history of several Chondracanthus species remains unclear, we analyzed the plastid rbcL and mitochondrial COI genes of the specimens from Korea and Japan, in combination with morphological observations, to examine their phylogenetic relationships. Our results confirmed the distinction of C. okamurae, which is separated from C. intermedius, and identified a novel species, C. cincinnus sp. nov. Three species (C. okamurae, C. intermedius and C. cincinnus) formed a monophyletic clade with C. tenellus. C. okamurae is distinguished by linear, narrow, cylindrical to compressed, slightly recurved axes, and a high-intertidal to subtidal distribution. It was collected from Korea and Japan, while C. intermedius was identified from Japan only. A new species, Chondracanthus cincinnus sp. nov., is characterized by linear, compressed, strongly recurved axes, and a low-intertidal to subtidal distiribution. Based on the molecular phylogeny using rbcL and COI data, we herein resurrect C. okamurae as a distinct species and identify C. cincinnus as a new species.
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심부전 악화로 사망한 대유행 인플루엔자(H1N1 2009) 1예
양미연,박정환,이윤나,임재희,이은정,전민혁,김태형,추은주 대한감염학회 2010 감염과 화학요법 Vol.42 No.2
On April, 2009, pandemic influenza (H1N1 2009) emerged in the United States at first. Clinical outcomes of this infection are reported as ranging from self-limited illness to respiratory failure or death. There were more than 250 deaths due to pandemic influenza until March 2010. Influenza-related deaths occurred in the elderly and in patients with underlying medical conditions. Most of the critically ill patients showed severe hypoxia and acute respiratory distress syndrome and required ventilator care. We experienced a 70-year-old man presenting with pandemic influenza (H1N1 2009) with heart failure. He was treated with antival agents, ventalator and extracorporeal membrane oxygenation. But his heart function was aggravared and resulted in his death.
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