National Institute of Ecology NIE

Seocheon, South Korea

National Institute of Ecology NIE

Seocheon, South Korea
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Shin S.Y.,National Institute of Ecology NIE | Jo B.-H.,Bio Center | Moon J.C.,National Institute of Ecology NIE | Lee J.R.,National Institute of Ecology NIE | And 4 more authors.
Journal of Plant Biotechnology | Year: 2016

Living modified (LM) crops are imported each year to South Korea as food and feeds, LM canola being one of the imported crops. The cultivation of LM crops is not permitted in South Korea but the import of these crops is increasing. In this study, we surveyed the environmental risk of imported LM canola at 9 provinces, from March 2009 to June 2013. Monitoring of canola was conducted around feed factories, roadsides, harbors, farmhouses, and flower festival regions. From the total of 595 canola samples collected from 1850 monitoring sites, we identified 6 LM canola samples. The LM canola samples were subjected to protein and DNA based analysis. PCR analyses using approved 5 single event primers (T45, MS8, RT73, Rf3 and Topas 19-2) revealed that two crops were glyphosate-resistant LM canolas, and four were glufosinate-resistant LM canolas. This study suggested that environmental monitoring is a useful research tool to manage LM crops unintentionally introduced into the environment in South Korea. This result can be used as a basis for future post-management of canola crops. © Korean Society for Plant Biotechnology.


Shin S.Y.,National Institute of Ecology NIE | Lim H.-S.,National Institute of Ecology NIE | Seol M.-A.,National Institute of Ecology NIE | Jung Y.J.,National Institute of Ecology NIE | And 4 more authors.
Journal of Plant Biotechnology | Year: 2016

With the increasing development and commercial use of genetically modified maize, it is essential to develop an appropriate method for detection of individual LMO (Living modified organism) events for monitoring the samples. In South Korea, commercial planting and accidental or unintentional releases of LMOs into the environment were not approved. In this study, to increase the efficiency of LMO detection, we developed simultaneous detection methods for 11 LM maize events. This multiplex PCR detection method is economical, as it saves time, cost and labor. We developed 11 individual LM maize events, and applied 4 multiplex PCR sets to the LM maize samples. These results are confirmed by applying the multiplex analysis of LMO environmental monitoring from 2012 to 2014, which represents the unintentionally released LM maize samples. The data were correlated with event specific PCR results. Our results indicate that the multiplex PCR method developed is suitable for detection of LM maize in LMO monitoring. © Korean Society for Plant Biotechnology.


Seol M.-A.,National Institute of Ecology NIE | Jo B.-H.,Bio Center | Choi W.,National Institute of Ecology NIE | Shin S.Y.,National Institute of Ecology NIE | And 4 more authors.
Journal of Plant Biotechnology | Year: 2017

Living modified crops are genetically modified living organisms and are widely used in biotechnical research and desired goods. As the reliance on LM products, concerns about safety of LMOs have been continuously increased in South Korea. We established the detection methods for unintentional released LMOs in environmental conditions. To detect six LM event genes of 1 canola, 1 maize and 4 soybeans, PCR conditions were based upon consideration of the Joint Research Centre information. Genomic DNAs were isolated from LM samples and PCR analysis were performed using each event-specific primer pair. Event-specific genes of all events were efficiently recognized by our methods. To investigate the insertion site of LM genes in each genome, we verified PCR product sequence by DNA sequencing. These results suggest that the LM event-specific gene amplification can be efficiently developed. In addition, our detection method is fit for monitoring and post-management of LM crops in the environment. © 2017 The Korean Society of Plant Biotechnology.


Ali A.,Gyeongsang National University | Raddatz N.,Technical University of Madrid | Aman R.,Gyeongsang National University | Kim S.,Gyeongsang National University | And 14 more authors.
Plant Physiology | Year: 2016

A crucial prerequisite for plant growth and survival is the maintenance of potassium uptake, especially when high sodium surrounds the root zone. The Arabidopsis HIGH-AFFINITY K+ TRANSPORTER1 (HKT1), and its homologs in other salt-sensitive dicots, contributes to salinity tolerance by removing Na+ from the transpiration stream. However, TsHKT1;2, one of three HKT1 copies in Thellungiella salsuginea, a halophytic Arabidopsis relative, acts as a K+transporter in the presence of Na+ in yeast (Saccharomyces cerevisiae). Amino-acid sequence comparisons indicated differences between TsHKT1;2 and most other published HKT1 sequences with respect to an Asp residue (D207) in the second pore-loop domain. Two additional T. salsuginea and most other HKT1 sequences contain Asn (N) in this position. Wild-type TsHKT1;2 and altered AtHKT1 (AtHKT1N-D) complemented K+-uptake deficiency of yeast cells. Mutanthkt1-1 plants complemented with both AtHKT1N-D and TsHKT1;2 showed higher tolerance to salt stress than lines complemented by the wild-type AtHKT1. Electrophysiological analysis in Xenopus laevis oocytes confirmed the functional properties of these transporters and the differential selectivity for Na+ and K+based on the N/D variance in the pore region. This change also dictated inward-rectification for Na+ transport. Thus, the introduction of Asp, replacing Asn, in HKT1-type transporters established altered cation selectivity and uptake dynamics. We describe one way, based on a single change in a crucial protein that enabled some crucifer species to acquire improved salt tolerance, which over evolutionary time may have resulted in further changes that ultimately facilitated colonization of saline habitats. © 2016 American Society of Plant Biologists. All rights reserved.


Shin S.Y.,National Institute of Ecology NIE | Moh S.H.,Anti Aging Research Institute Of Bio Fdandc Coltd | Hwang Y.J.,Gachon University
Journal of Plant Biotechnology | Year: 2016

The purpose of this study was to investigate biological activities of Brassica rapa (Turnip) plant callus extracts of Ganghwa-gun of Incheon city using water, ultrasonic wave and ethanol extractions to develop functional materials. DPPH radical scavenging activities of the callus extracts were increased in a concentration-dependent manner, as compared with control. The astringent effects of the ethanol extracts were higher, as compared to water and ultrasonic extracts. In the collagen synthesis assay, the ethanol extract showed significant anti-wrinkle effects of 59% and 78% at a concentration of 5 ppm and 10 ppm, respectively. These results suggested that water, ultrasonic wave and ethanol extracts of turnip plant calluses are natural antioxidant sources. Especially, the ethanol extract can be regarded as a functional, natural cosmetic material with astringent and anti-wrinkle effects. © Korean Society for Plant Biotechnology.


Khan A.,Gyeongsang National University | Hossain M.T.,Gyeongsang National University | Park H.C.,National Institute of Ecology NIE | Yun D.-J.,Gyeongsang National University | And 2 more authors.
Plant and Soil | Year: 2016

Background and aims: Many rhizobacteria promote plant growth by producing hormones that stimulate the development of plant root system and increase plant biomass. The aim of this study was to investigate the growth promotion activity of the bacterial strain Martelella endophytica YC6887 and elucidate the signaling pathways potentially involved in Arabidopsis interaction with M. endophytica YC6887. Methods: The growth regulation was evaluated by inoculation of strain YC6887 with wild-type Arabidopsis Col-0 seedlings and mutants defective in auxin aux1-7, axr4-2, eir1-1, ethylene ein2-1, etr1-3, jasmonic acid signaling jar1, and root hair deficient mutant rhd6. The auxin response was further determined by using transgenic line DR5::GUS and a polar auxin transport inhibitor, 1-N-naphthylphthalamic acid (NPA). Results: M. endophytica YC6887 increased the number of lateral roots and plant biomass of Arabidopsis by producing phenylacetic acid. The growth promotion and improved lateral root development by the bacterium decreased in the auxin related mutants, whereas the ethylene and jasmonic acid mutants had a wild type response. The strain YC6887 increased root hair density in wild type Col-0 and recovered the root hair forming ability in root hair deficient mutant rhd6. Moreover, strain YC6887 treatment showed distinct response in DR5::GUS transgenic line compared to the control. Strain YC6887 lost its growth-promoting activity in the presence of NPA, an auxin transport inhibitor. This indicated that strain YC6887 activated the auxin signaling mechanism. Conclusions: Our results showed that M. endophytica YC6887 promoted plant growth in terms of plant biomass and root system development. Arabidopsis root system development upon M. endophytica YC6887 colonization was dependent on auxin signaling, but independent of ethylene and jasmonic acid signaling. © 2016 Springer International Publishing Switzerland


Jo B.-H.,National Institute of Ecology NIE | Lee J.R.,National Institute of Ecology NIE | Choi W.,National Institute of Ecology NIE | Moon J.C.,National Institute of Ecology NIE | And 5 more authors.
Journal of Plant Biotechnology | Year: 2015

Canola is a crop globally used for production of oil and biofuel. Cultivation area and import volume of living modified (LM) canola have been increasing every year. As canola import dependence has reached 100% in Korea, efforts have been made for safety management of LM canola and ecological risk assessment. We developed a set of multiplex PCR method for simultaneous detection of 5 LM canola events (Topas 19/2, Rf3, Ms8, RT73 and T45) approved in Korea. The multiplex PCR assay developed allows amplification of estimated products of 5 LM canolas from event specific primer sets. Primer extension time was skipped for a time-consuming process and two annealing steps (20 cycles at 55°C and 20 cycles at 60°C) were performed for yielding the best result which was sufficient to distinguish five LM canolas. Our results suggest that multiplex PCR method provides a cost and time-effective approach for LM canola detection. © Korean Society for Plant Biotechnology.


Jo B.-H.,National Institute of Ecology NIE | Lee C.S.,Korea Research Institute of Bioscience and Biotechnology | Song H.-R.,National Institute of Ecology NIE | Lee H.-G.,Korea Research Institute of Bioscience and Biotechnology | Oh H.-M.,Korea Research Institute of Bioscience and Biotechnology
Journal of Microbiology and Biotechnology | Year: 2014

A strain-specific identification method is required to secure Chlorella strains with useful genetic traits, such as a fast growth rate or high lipid productivity, for application in biofuels, functional foods, and pharmaceuticals. Microsatellite markers based on simple sequence repeats can be a useful tool for this purpose. Therefore, this study developed five novel microsatellite markers (mChl-001, mChl-002, mChl-005, mChl-011, and mChl-012) using specific loci along the chloroplast genome of Chlorella vulgaris. The microsatellite markers were characterized based on their allelic diversities among nine strains of C. vulgaris with the same 18S rRNA sequence similarity. Each microsatellite marker exhibited 2∼5 polymorphic allele types, and their combinations allowed discrimination between seven of the C. vulgaris strains. The two remaining strains were distinguished using one specific interspace region between the mChl-001 and mChl-005 loci, which was composed of about 27 single nucleotide polymorphisms, 13∼15 specific sequence sites, and (T)n repeat sites. Thus, the polymorphic combination of the five microsatellite markers and one specific locus facilitated a clear distinction of C. vulgaris at the strain level, suggesting that the proposed microsatellite marker system can be useful for the accurate identification and classification of C. vulgaris. © 2014 by The Korean Society for Microbiology and Biotechnology.


PubMed | National Institute of Ecology NIE
Type: Journal Article | Journal: Journal of microbiology and biotechnology | Year: 2014

A strain-specific identification method is required to secure Chlorella strains with useful genetic traits, such as a fast growth rate or high lipid productivity, for application in biofuels, functional foods, and pharmaceuticals. Microsatellite markers based on simple sequence repeats can be a useful tool for this purpose. Therefore, this study developed five novel microsatellite markers (mChl-001, mChl-002, mChl-005, mChl-011, and mChl-012) using specific loci along the chloroplast genome of Chlorella vulgaris. The microsatellite markers were characterized based on their allelic diversities among nine strains of C. vulgaris with the same 18S rRNA sequence similarity. Each microsatellite marker exhibited 2~5 polymorphic allele types, and their combinations allowed discrimination between seven of the C. vulgaris strains. The two remaining strains were distinguished using one specific interspace region between the mChl-001 and mChl-005 loci, which was composed of about 27 single nucleotide polymorphisms, 13~15 specific sequence sites, and (T)n repeat sites. Thus, the polymorphic combination of the five microsatellite markers and one specific locus facilitated a clear distinction of C. vulgaris at the strain level, suggesting that the proposed microsatellite marker system can be useful for the accurate identification and classification of C. vulgaris.


Jo B.-H.,National Institute of Ecology NIE | Seol M.-A.,National Institute of Ecology NIE | Shin S.Y.,National Institute of Ecology NIE | Kim R.,National Institute of Ecology NIE | And 4 more authors.
Journal of Plant Biotechnology | Year: 2016

The growth area of living modified (LM) cotton has steadily increased every year, since its first commercialization in 1996. Development of environmental risk assessment tools and techniques for LM cotton is required for ecosystem safety. We therefore developed multiplex PCR assays for simultaneous detection of two (MON15985, MON531) and four (GHB614, LLCOTTON25, MON88913 and MON1445) LM cotton events approved in Korea, with event specific primer pairs. The PCR reactions were optimized by using event specific primers of six LM cottons at various concentrations. The reactions allows amplification of estimated amplicons of MON15985 (214 bp), MON531 (270 bp), GHB614 (119 bp), LLCOTTON25 (164 bp), MON88913 (276 bp), and MON1445 (389 bp) from multiplex PCR reactions. The multiplex PCR assay developed allowed that two annealing steps (15 cycles at 55°C and 25 cycles at 60°C) were performed for amplification of distinguished two LM cottons, and only one annealing step (50 cycles at 60°C) was necessary for tetraplex PCR. Primer extension step of all PCR reactions was skipped for time-effective amplification. Our methods suggest that two multiplex PCR assays can be cost-effective and a rapid diagnostic tool for environmental LMO monitoring of six LM cottons.

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