Article
Plant Sciences
Sissi Lozada-Gobilard, Nadine Nielsen, Yuval Sapir
Summary: Large flowers and black patches may act as honest signals, indicating the size of the shelter to Eucera bees. This study found a positive correlation between flower and patch size with tunnel volume, suggesting that they are honest signals under controlled and natural conditions. However, the effect on fitness was population-specific in natural populations.
Article
Plant Sciences
Bokyung Choi, Jangseung Ryu, Tae-Soo Jang
Summary: This study used scanning electron microscopy to describe the pollen morphology of Korean Iris. The observed pollen micromorphological characters, including size, shape, and exine ornamentation, enabled species distinction and taxonomic delimitation. The pollen morphological data presented in this study are of systematic significance to Korean Iris species.
Article
Plant Sciences
Mi-Jeong Yoo, Dong-Pil Jin, Hyun-Oh Lee, Chae Eun Lim
Summary: This study investigated the plastome structural changes in three Korean Asarum species, revealing a unique tripartite structure due to the incorporation and duplication of the small single copy into the inverted repeat. Phylogenetic analysis based on 79 plastid protein-coding genes supported the monophyly of Korean Asarum species and demonstrated effectiveness in delineating some sections and species within Aristolochiaceae. Simple sequence repeats in the plastome were evaluated as potential molecular markers for species delimitation.
Article
Biochemistry & Molecular Biology
Inkyu Park, Bokyung Choi, Hanna Weiss-Schneeweiss, Soonku So, Hyeon-Ho Myeong, Tae-Soo Jang
Summary: This study conducted comparative analyses on the karyotypes of three Iris species in Korea, with an emphasis on the number and localization of 5S and 35S rDNA loci using FISH. The chloroplast genomes of the same individuals were also sequenced and compared. The results provide important insights into the origin of the progenitor species and the genomes of Iris series Chinenses.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Biology
Hak-Min Kim, Sungwon Jeon, Oksung Chung, Je Hoon Jun, Hui-Su Kim, Asta Blazyte, Hwang-Yeol Lee, Youngseok Yu, Yun Sung Cho, Dan M. Bolser, Jong Bhak
Summary: The study compared 7 sequencing platforms using the same KOREF sample, and found that MGI platforms showed higher concordance rates for SNP genotyping compared to HiSeq2000 and HiSeq4000. The MGI platforms were also found to have the most similar characteristics to the HiSeq2500 platform according to a similarity matrix of variant calls. Overall, MGI and Illumina sequencing platforms showed comparable levels of sequencing quality, coverage uniformity, percent GC coverage, and variant accuracy, with MGI platforms being cost-effective for a wide range of genomics research fields.
Article
Microbiology
Da-Ryung Jung, Hye-Young Yoo, Min-Ji Kim, Vineet Singh, Sung-Ha Park, Minsoo Jeong, Byoung-Jun Park, Jae-Ho Shin
Summary: This study investigated the potential link between skin-gut microorganisms and androgenetic alopecia (AGA) by analyzing the scalp and gut microbiomes of individuals with and without AGA. The findings suggest that the appearance of non-inhabitant bacteria in the scalp increases as hair loss progresses. Bacterial functional differences were also observed in the gut microbiomes of AGA patients, indicating a potential involvement in intestinal homeostasis. Additionally, the networks of the scalp and gut microbiomes were more complex and dense in AGA patients.
FRONTIERS IN MICROBIOLOGY
(2022)
Article
Biodiversity Conservation
Sang-Chul Kim, Young-Ho Ha, Dong-Kap Kim, Dong Chan Son, Hyuk-Jin Kim, Kyung Choi
Summary: This study compared the chloroplast genome sequences of two Korean endemic Primula varieties and identified similarities in their structure and gene content. The findings are significant for phylogenetic, taxonomic, and evolutionary studies of the genus Primula, as well as the analysis of genetic diversity and development of identification markers for these two varieties.
Article
Medical Laboratory Technology
Yangsoon Lee, Hye Gyung Bae, Dongju Won, Woobin Yun, Hyukmin Lee, Jong Rak Choi, Young Uh, Kyungwon Lee
Summary: In this study, the distribution of GBS isolates in pregnant Korean women was investigated. CC1 was the dominant lineage, followed by CC19, CC12, and CC17. The low prevalence of CC17 GBS colonization may explain the low frequency of neonatal GBS infections. Whole-genome sequencing is a useful tool for predicting antimicrobial susceptibility and capsular serotypes in GBS isolates.
ANNALS OF LABORATORY MEDICINE
(2023)
Article
Anatomy & Morphology
Bokyung Choi, Sun-Yu Kim, Tae-Soo Jang
MICROSCOPY RESEARCH AND TECHNIQUE
(2020)
Article
Plant Sciences
Pavel Neumann, Ludmila Oliveira, Jana Cizkova, Tae-Soo Jang, Sonja Klemme, Petr Novak, Katarzyna Stelmach, Andrea Koblizkova, Jaroslav Dolezel, Jiri Macas
Summary: The parasitic genus Cuscuta stands out for its unique centromere organization and genome size variations among plants. Monocentric Cuscuta species show a remarkable 102-fold variation in genome sizes, while holocentric species have more moderate sizes. The transition to holocentric chromosomes in Cuscuta is associated with changes in epigenetic marks, chromosome number, and repetitive DNA sequence composition.
Article
Anatomy & Morphology
Hyeonjin Kim, Bokyung Choi, Changyoung Lee, Scott A. M. McAdam, Jin-Hyub Paik, Tae-Soo Jang
Summary: This study provides a detailed description of leaf, floral, pollen, and orbicule micromorphology of four Korean Disporum species using light and scanning electron microscopy. The presence of orbicules and their taxonomic implications in Korean Disporum species are described for the first time, and phylogenetically informative characters are identified to improve understanding of the systematic relationships of Korean species in the genus Disporum.
MICROSCOPY RESEARCH AND TECHNIQUE
(2021)
Article
Plant Sciences
Bokyung Choi, Geun-Hye Gang, Hyeonjin Kim, Hyejoo Byun, Minyeong Kwak, Soonku So, Hyeon-Ho Myeong, Tae-Soo Jang
Summary: The study investigated the chromosome number, karyotype, and genome size of the Korean lady's slipper orchid, finding that the species is diploid with 2n = 22 and x = 11 as the base chromosome number. The karyotypes were similar among individuals and differentiated the Korean population from the Japanese lady's slipper orchid. Results were consistent with Korean populations being more closely related to Chinese populations than Japanese populations, aiding in the discrimination of Eastern Asian lady's slipper orchid species.
Article
Cell Biology
Seongyeon Kang, Bokyung Choi, Tae-Soo Jang
Summary: The genus Cirsium is a member of the tribe Cardueae in the Asteraceae family, distributed in the northern hemisphere. There is a history of taxonomic confusion within the Carduus-Cirsium group due to complex morphological and molecular data. This study reports chromosome numbers and karyotypes of Korean Cirsium species, aiding in understanding chromosomal evolution.
Article
Anatomy & Morphology
Bokyung Choi, Yu-Eun Ahn, Tae-Soo Jang
Summary: In this study, the leaf micromorphological characteristics of Korean irises were examined, providing valuable information for species identification. The presence of polymorphic stomatal types was reported for the first time, and the potential correlation between genome size and epidermal guard cell length was discussed.
MICROSCOPY RESEARCH AND TECHNIQUE
(2022)
Article
Plant Sciences
Bokyung Choi, Jangseung Ryu, Tae-Soo Jang
Summary: This study used scanning electron microscopy to describe the pollen morphology of Korean Iris. The observed pollen micromorphological characters, including size, shape, and exine ornamentation, enabled species distinction and taxonomic delimitation. The pollen morphological data presented in this study are of systematic significance to Korean Iris species.
Article
Plant Sciences
Bokyung CHOI, Hyeonjin KIM, Hye-Joo BYUN, Geun-Hye GANG, Yongsoon LEE, Hyeon-Ho MYEONG, Soonku SO, Tae-Soo JANG
Summary: This study reports the chromosome number, karyotype structure, and genome size of Rhododendron keiskei var. hypoglaucum for the first time. The chromosome number of this plant was found to be 2n = 26 with x = 13 as the base chromosome number. The karyotype consisted of metacentric and sub-metacentric chromosomes of similar length. These findings provide important insights for further molecular, cytogenetic, and phylogenomic analyses of Rhododendron.
KOREAN JOURNAL OF PLANT TAXONOMY
(2022)
Article
Cell Biology
Young -Min Choi, Bokyung Choi, Tae -Soo Jang
Summary: Juncus L. is a genus of herbs with approximately 310 species globally, but less commonly found in the tropics. This study presents detailed information on chromosome numbers from 36 individuals of 10 Korean Juncus taxa, revealing variations in chromosome numbers with no systematic relevance. The study suggests that this chromosome number variation could provide additional evidence for morphological diversification.
Article
Biochemistry & Molecular Biology
Inkyu Park, Bokyung Choi, Hanna Weiss-Schneeweiss, Soonku So, Hyeon-Ho Myeong, Tae-Soo Jang
Summary: This study conducted comparative analyses on the karyotypes of three Iris species in Korea, with an emphasis on the number and localization of 5S and 35S rDNA loci using FISH. The chloroplast genomes of the same individuals were also sequenced and compared. The results provide important insights into the origin of the progenitor species and the genomes of Iris series Chinenses.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Multidisciplinary Sciences
Pavel Neumann, Ludmila Oliveira, Tae-Soo Jang, Petr Novak, Andrea Koblizkova, Veit Schubert, Andreas Houben, Jiri Macas
Summary: The transition from monocentric to holocentric organization in Cuscuta was associated with loss or truncation of kinetochore-related genes, disruption of centromeric localization of kinetochore proteins, and degeneration of the spindle assembly checkpoint. This indicates that holocentric Cuscuta species lack a standard kinetochore and do not employ the SAC to control microtubule attachment to chromosomes.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2023)
Article
Plant Sciences
Hyeonjin Kim, Bokyung Choi, Changyoung Lee, Jin-Hyub Paik, Chang-Gee Jang, Hanna Weiss-Schneeweiss, Tae-Soo Jang
Summary: The study found that differentiation in genome size and chromosome number is not necessarily correlated with morphological differentiation of cytotypes.
Article
Plant Sciences
Hye-Joo Byun, Tae -Soo Jang
Summary: A comprehensive micromorphological study of the Korean woodrush was conducted, analyzing leaf and pistil characteristics. The study revealed important diagnostic criteria for distinguishing between different species within the Korean Luzula genus, providing valuable information for taxonomic classification.
Article
Anatomy & Morphology
Bokyung Choi, Yeojin Hwang, Scott A. M. Mcadam, Tae-Soo Jang
Summary: A comparative study of leaf micromorphological characteristics in Korean Ajuga species was conducted using light microscopy and scanning electron microscopy. The research found considerable diversity in epidermal and stomatal anatomy across the species, with different types of stomatal complexes and various glandular trichomes. The study highlights the taxonomic usefulness of trichome type, epidermal cell shape, and stomatal morphology for species identification.
MICROSCOPY RESEARCH AND TECHNIQUE
(2023)
