Nakdonggang National Institute of Biological Resources

South Korea

Nakdonggang National Institute of Biological Resources

South Korea
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Kim T.,Korea University | Kim J.,Nakdonggang National Institute of Biological Resources | Kim J.,Ewha Womans University | Park J.-K.,Ewha Womans University
Nematology | Year: 2017

A new Acrobeloides is described and illustrated from samples collected in rice farmland in South Korea. Acrobeloides varius sp. n. exhibits morphological characters of other acrobeloids, including a corpus with elongate spindle-like swelling and lateral incisures that extend to the tail end region. However, this new species is distinguished from other acrobeloids by having lateral incisures that change in number from one to five, three low rounded labial probolae, and a conical pointed tail end with a small spike-shaped mucron. In this study, a detailed morphological comparison of Acrobeloides species is provided, along with new molecular sequence data from the D2-D3 regions of LSU, SSU and partial mtDNA cox1 region from the new species, which can be used as molecular barcode sequences. © 2017 by Koninklijke Brill NV, Leiden, The Netherlands.

Goh J.,Seoul National University | Goh J.,Nakdonggang National Institute of Biological Resources | Jeon J.,Yeungnam University | Lee Y.-H.,Seoul National University
Scientific Reports | Year: 2017

ER retention receptor is a seven trans-membrane protein that plays pivotal roles in function and integrity of endoplasmic reticulum (ER). Insertional mutagenesis of Magnaporthe oryzae identified MoERR1 as a pathogenicity gene encoding putative ER retention receptor orthologous to ERD2 in Saccharomyces cerevisiae. Search through the genome identified that M. oryzae possesses another ortholog of ERD2, which is designated as MoERR2. When MoERR1 and MoERR2 were tagged with GFP, both were localized to ER. Targeted disruption of MoERR1 showed pleiotropic effects on phenotypes, while deletion of MoERR2 had no effect on phenotypes we examined. The disruption mutant of MoERR1 showed growth retardation and produced significantly reduced number of conidia with aberrant morphology. Appressoria from the mutant were unable to penetrate into plant tissues presumably due to defect in cell wall integrity, thereby rendering the mutant non-pathogenic. The MoERR1 mutant also appeared to display abnormal ER structure and mis-regulation of genes involved in chaperone function and unfolded protein response under ER stress condition. Taken together, these results suggest that MoERR1 is a ER retention receptor required for function and integrity of ER, and that MoERR1-mediated ER functionalities are essential for fungal development and pathogenesis. © 2017 The Author(s).

Cho H.-W.,Nakdonggang National Institute of Biological Resources
Acta Entomologica Musei Nationalis Pragae | Year: 2017

The Gonioctena mauroi species-group of the subgenus Brachyphytodecta Bechyně, 1948 is proposed to include four species: G. (B.) mauroi Cho & Borowiec, 2016 (Vietnam), G. (B.) medvedevi Cho & Borowiec, 2016 (Vietnam), G. (B.) kuatunensis sp. nov. (China: Fujian), and G. (B.) longshengensis sp. nov. (China: Guangxi). They are characterized by the presence of setae on the aedeagus, which is unique within the subgenus. A key to the species, habitus photographs, illustrations of diagnostic characters and a distribution map are provided. Ovoviviparity is newly recorded in G. (B.) longshengensis sp. nov. © 2017, National Museum Prague. All rights reserved.

Baek K.,Nakdonggang National Institute of Biological Resources | Han J.-H.,Nakdonggang National Institute of Biological Resources | Lee M.-H.,Nakdonggang National Institute of Biological Resources
International Journal of Systematic and Evolutionary Microbiology | Year: 2017

A Gram-staining-negative, non-motile, non-pigmented, strictly aerobic and rod-shape bacterium, designated BK296T, was isolated from stream water originating from a limestone cave in Samcheok, Korea. Optimal growth of strain BK296T was observed at 30 °C, pH 7.0–8.0 and without NaCl. Phylogenetic analysis based on 16S rRNA gene sequences showed that strain BK296T belonged to the genus Perlucidibaca, forming a robust clade with a member of the genus, and was most closely related to Perlucidibaca piscinae (97.8 %). The average nucleotide identity value between strain BK296T and Perlucidibaca piscinae IMCC1704T was 79.8 %, and the genome-to-genome distance was 17.5% on mean. The G+C content of the DNA of strain BK296T was 55.7 mol%. The major fatty acids were summed feature 3 (C16 : 1ω7c and/or C16 : 1ω6c), C16 : 0, C12 : 0 3-OH and summed feature 8 (C18 : 1ω7c and/or C18 : 1ω6c). The major isoprenoid quinone was ubiquinone Q-8. On the basis of phenotypic, genotypic and phylogenetic analyses, strain BK296T (=KCTC 52162T=JCM 31377T) represents a novel species of the genus Perlucidibaca, for which the name Perlucidibaca aquatica sp. nov. is proposed. © 2017 IUMS.

Two new species, Gonioctena (Brachyphytodecta) davidi sp. nov. and G. (B.) kangdingensis sp. nov., are described from Sichuan, China. Both are easily distinguished from other species by the presence of many micro-denticles on apicolateral surface of aedeagus, which is a unique character in the genus Gonioctena Chevrolat, 1836. A distribution map, photo-graphs and diagnostic characters with illustrations of each species are included. Copyright © 2017 Magnolia Press.

PubMed | Soonchunhyang University, GnC BIO Co., Chonnam National University, Korea Research Institute of Bioscience and Biotechnology and 4 more.
Type: Journal Article | Journal: Genes | Year: 2016

The tadpole shrimp (

PubMed | 8Korea Research Institute of Bioscience & Biotechnology KRIBB, 4Korea Research Institute of Bioscience & Biotechnology KRIBB, Korea Research Institute of Bioscience and Biotechnology, 1Nanjing Forestry University and 2 more.
Type: | Journal: International journal of systematic and evolutionary microbiology | Year: 2016

A polyphasic taxonomic study was carried out on strain EBR-4-2T isolated from a biofilm reactor in Korea. The cells of the strain were Gram-staining-positive, non-spore-forming, non-motile, and rod-shaped. Comparative 16S rRNA gene sequence studies showed a clear affiliation of this strain with Actinobacteria, which had the highest pairwise sequence similarities with Actinotalea suaedae EGI 60002T (98.7 %), Actinotalea ferrariae CF5-4T (96.3 %) and Actinotalea fermentans DSM 3133T (96.2 %). The phylogenetic analysis based on the 16S rRNA gene sequences showed that the strain formed a clear phylogenetic lineage with the genus Actinotalea. The major fatty acids were identified as C15:0 anteiso, C16:0, C16:0 N alcohol, C15:1 anteiso A and C15:0 iso. The major cellular polar lipids were identified as diphosphatidylglycerol, phosphatidylinositol mannoside, phosphatidylinositol and glycolipid. The peptidoglycan type was A4 containing L-Orn-D-Glu. The whole-cell-wall sugars were glucose and ribose. The respiratory quinone was identified as MK-10(H4), and the genomic DNA G+C content was determined to be 74.8 mol%. Based on the polyphasic evidence, it is proposed that strain EBR-4-2T should be designated as a new species named Actinotalea caeni sp. nov. The type stain is EBR-4-2T (=KCTC 33604T =JCM 30447T).

Song M.-Y.,Inland Fisheries Research Institute | Lee W.-O.,Inland Fisheries Research Institute | Kim K.-H.,Inland Fisheries Research Institute | Park Y.-S.,Kyung Hee University | Bae M.-J.,Nakdonggang National Institute of Biological Resources
Annales de Limnologie | Year: 2016

Dams can cause fragmentation of the natural structure and function of fish communities up- and downstream of the dam. In this study, we examined the effects of the Goesan Dam on the longitudinal distribution of fish in the Dal stream, using two computational methods: a self-organizing map (SOM) and spatial autocorrelation. Fish were collected at 16 different study sites in two seasons (spring and autumn). SOM classified the study sites into four clusters (1-4), reflecting differences in the longitudinal distribution patterns of fish, and the effects of the dam on fish community composition. Samples in clusters 1 and 2 mostly originated from tributaries and the upstream section of the dam, whereas samples in cluster 4 originated from downstream study sites of the dam. Cluster 3 included study sites originating directly from up- and downstream of the dam. Species turnover and spatial autocorrelation results confirmed the fish community alteration near the dam. Species turnover was the highest between study sites directly up- and downstream of the dam. The Mantel correlogram was positive when applied to short distances between the study sites. However, it was negative for the farthest distance, including sites near the dam, indicating that the dam caused significant alterations to the fish community. Overall, our results suggest that the habitat alterations (e.g., fragmentation of longitudinal gradients and disruption of flow regimes) due to dam construction have caused fragmentation of fish communities. © 2016 EDP Sciences.

Jeong H.I.,Chung - Ang University | Jin H.M.,Chung - Ang University | Jin H.M.,Nakdonggang National Institute of Biological Resources | Jeon C.O.,Chung - Ang University
Journal of Biotechnology | Year: 2016

Sphingorhabdus sp. M41, capable of degrading aliphatic and aromatic hydrocarbons, was isolated from crude oil-contaminated costal sediment by an enrichment culture and its complete genome was sequenced. The genome of strain M41 has a chromosome with a size of 3,324,420 bp, including 44 tRNAs, 6 rRNAs, and 3118 protein-coding genes. In addition, many potential genes responsible for the biodegradation of aliphatic and aromatic hydrocarbons were identified from the genome. This is the first complete genome of the genus Sphingorhabdus, which will provide insights into the bioremediation of crude oil-contaminated costal sediment by strain M41. © 2016.

Yun S.M.,Sangmyung University | Lee S.D.,Nakdonggang National Institute of Biological Resources | Park J.S.,Sangmyung University | Lee J.H.,Sangmyung University
Algae | Year: 2016

Paralia species have been frequently reported as P. sulcata in Korea, despite the species diversity within the genus. To understand the species diversity of Paralia in Korea, we collected phytoplankton samples at 79 sites from April 2006 to April 2015. Five Paralia species, P. fenestrata, P. guyana, P. marina, P. cf. obscura, and P. sulcata, were observed during this study, and we described their fine structure in terms of quantitative and qualitative morphological characteristics. To provide additional criteria to identify Paralia species more clearly, we morphometrically analysed four quantitative characteristics on valve diameter: pervalvar axis / diameter, internal linking spines / diameter, marginal linking spines/diameter, and fenestrae/diameter using non-metric multidimensional scaling (MDS). MDS analysis distinguished four Paralia species: P. guyana, P. marina, P. cf. obscura, and P. sulcata, with the exception of P. fenestrata. This new approach in using morphometric analysis is useful for the accurate identification of Paralia species. © 2016 The Korean Society of Phycology.

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