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113 results on '"Kang, Jung Hwa"'

8. High-throughput discovery of plastid genes causing albino phenotypes in ornamental chimeric plants

Author

Park, Hyun-Seung, primary, Jeon, Jae-Hyeon, additional, Cho, Woohyeon, additional, Lee, Yeonjeong, additional, Park, Jee Young, additional, Kim, Jiseok, additional, Park, Young Sang, additional, Koo, Hyun Jo, additional, Kang, Jung Hwa, additional, Lee, Taek Joo, additional, Kim, Sang Hoon, additional, Kim, Jin-Baek, additional, Kwon, Hae-Yun, additional, Kim, Suk-Hwan, additional, Paek, Nam-Chon, additional, Jang, Geupil, additional, Suh, Jeong-Yong, additional, and Yang, Tae-Jin, additional

Published
2022
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12. High-throughput discovery of plastid genes causing albino phenotypes in ornamental chimeric plants.

Author

Park, Hyun-Seung, Jeon, Jae-Hyeon, Cho, Woohyeon, Lee, Yeonjeong, Park, Jee Young, Kim, Jiseok, Park, Young Sang, Koo, Hyun Jo, Kang, Jung Hwa, Lee, Taek Joo, Kim, Sang Hoon, Kim, Jin-Baek, Kwon, Hae-Yun, Kim, Suk-Hwan, Paek, Nam-Chon, Jang, Geupil, Suh, Jeong-Yong, and Yang, Tae-Jin

Subjects
ALBINISM, PHENOTYPES, JAPANESE knotweed, CHIMERAS (Botany), RNA polymerases, ORNAMENTAL plants, PHOTOSYNTHESIS
Abstract

Chimeric plants composed of green and albino tissues have great ornamental value. To unveil the functional genes responsible for albino phenotypes in chimeric plants, we inspected the complete plastid genomes (plastomes) in green and albino leaf tissues from 23 ornamental chimeric plants belonging to 20 species, including monocots, dicots, and gymnosperms. In nine chimeric plants, plastomes were identical between green and albino tissues. Meanwhile, another 14 chimeric plants were heteroplasmic, showing a mutation between green and albino tissues. We identified 14 different point mutations in eight functional plastid genes related to plastid-encoded RNA polymerase (rpo) or photosystems which caused albinism in the chimeric plants. Among them, 12 were deleterious mutations in the target genes, in which early termination appeared due to small deletion-mediated frameshift or single nucleotide substitution. Another was single nucleotide substitution in an intron of the ycf3 and the other was a missense mutation in coding region of the rpoC2 gene. We inspected chlorophyll structure, protein functional model of the rpoC2, and expression levels of the related genes in green and albino tissues of Reynoutria japonica. A single amino acid change, histidine-to-proline substitution, in the rpoC2 protein may destabilize the peripheral helix of plastid-encoded RNA polymerase, impairing the biosynthesis of the photosynthesis system in the albino tissue of R. japonica chimera plant. [ABSTRACT FROM AUTHOR]

Published
2023
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30. Discrimination and Authentication of Eclipta prostrata and E. alba Based on the Complete Chloroplast Genomes

Author

Kim, Inseo, primary, Park, Jee Young, additional, Lee, Yun Sun, additional, Lee, Hyun Oh, additional, Park, Hyun-Seung, additional, Jayakodi, Murukarthick, additional, Waminal, Nomar Espinosa, additional, Kang, Jung Hwa, additional, Lee, Taek Joo, additional, Sung, Sang Hyun, additional, Kim, Kyu Yeob, additional, and Yang, Tae-Jin, additional

Published
2017
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49. Cold-pressed oil from Citrus aurantifolia inhibits the proliferation of vascular smooth muscle cells via regulation of PI3K/MAPK signaling pathways.

Author

Song, Byeong-Wook, Lee, Chang Youn, Park, Jun-Hee, Kim, Bomi, Lee, Seahyoung, Lim, Soyeon, Kim, Sang Woo, Choi, Jung-Won, Kang, Misun, Kang, Jung Hwa, Lee, Sung-Suk, Park, Mi-Jin, Moon, Hanbyeol, Hwang, Ki-Chul, and Kim, Il-Kwon

Subjects
VASCULAR smooth muscle, CELLULAR control mechanisms, MUSCLE cells, PROLIFERATING cell nuclear antigen, CELLULAR signal transduction, CYCLIN-dependent kinases
Abstract

Vascular occlusive disease is a chronic disease with significant morbidity and mortality. Although a variety of therapies and medications have been developed, the likelihood of disease re-emergence is high and this can be life-threatening. Based on a previous screening experiment related to vascular obstructive diseases using 34 types of essential oils, cold-pressed oil (CpO) from Citrus aurantifolia (lime) has been demonstrated to have the best effect for the inhibition of vascular smooth muscle cells (VSMCs) proliferation. The aim of the present study was to evaluate the effect of lime CpO on the pathological changes of VSMCs. To determine this, the effect of lime CpO on VSMC proliferation, a major cause of vascular disease, was investigated. To determine the safe concentration interval for toxicity of CpO during VSMC culture, a dilution of 1x10-5 was determined using Cell Counting Kit-8 assay, which was confirmed to be non-toxic using a lactate dehydrogenase assay. To examine the effect of lime CpO in cellular signaling pathways, changes in phosphorylation of both the PI3K/AKT/mTOR and extracellular signal-regulated MEK/ERK signaling pathways with serum were investigated. Furthermore, lime CpO with FBS also significantly decreased the expression levels of the cell cycle regulators cyclin D1 and proliferating cell nuclear antigen. Additionally, lime CpO with FBS significantly inhibited the sprouting of VSMCs in an ex vivo culture system. These results suggested that lime CpO inhibited the abnormal proliferation of VSMCs and can be developed as a nature-based therapeutic agent for obstructive vascular disease. [ABSTRACT FROM AUTHOR]

Published
2022

50. Deactivation behavior of a TiO2-added Pd catalyst in acetylene hydrogenation

Author

Kim, Woo Jae, Kang, Jung Hwa, Ahn, In Young, and Moon, Sang Heup

Subjects
*CATALYSTS, *CHEMICAL inhibitors, *HYDROGENATION, *ACETYLENE
Abstract

The deactivation behavior of a TiO2-added Pd catalyst, reduced at 773 K, for the selective hydrogenation of acetylene showed that the added TiO2 suppressed the formation of green oil and, consequently, improved the lifetime of the catalyst. The average number of carbon atoms per green oil molecule was smaller for the TiO2-added catalyst than for the Pd-only catalyst because multiply coordinated Pd sites were suppressed on the TiO2-added catalyst. The added TiO2 also retarded the sintering of Pd particles during catalyst regeneration, presumably due to the anchoring effect of TiO2, and suppressed green oil formation, even after the regeneration step. [Copyright &y& Elsevier]

Published
2004
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