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SPL3/4/5 Integrate Developmental Aging and Photoperiodic Signals into the FT-FD module in Arabidopsis Flowering

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molecular Plant 2016年第12期9卷 1647-1659页

作者： Jae-Hoon Jung Hyo-Jun Lee Jae Yong Ryu chung-mo park Sainsbury Laboratory University of Cambridge Cambridge CB2 1LR UK Department of Chemistry plant Genomics and Breeding Institute Seoul National University Seou1151-742 Korea These authors contributed equally to this article

Environmental sensitivity varies across developmental phases in flowering plants. In the juvenile phase, mi- croRNA156 （miR156）-mediated repression of SQUAmoSA PROmoTER-BINDING PROTEIN-LIKE （SPL） transcription factors renders Arabidopsis plants incompetent to floral inductive signals, including long- day （LD） photoperiod. During the vegetative phase transition, which accompanies a reduction of miR156 and a concomitant elevation of its targets, plants acquire reproductive competence such that LD signals promote flowering. However, it remains largely unknown how developmental signals are associated with photoperiodic flowering. Here, we show that SPL3, SPL4, and SPL5 （SPL3/4/5） potentiate the FLOWERING LOCUS T （FT）-FD module in photoperiodic flowering. SPL3/4/5 function as transcriptional activators through the interaction with FD, a basic leucine zipper transcription factor which plays a critical role in photoperiodic flowering. SPL3/4/5 can directly bind to the promoters of APETALA1, LEAFY, and FRUITFULL, thus mediating their activation by the FT-FD complex. Our findings demonstrate that SPL3/ 4/5 act synergistically with the FT-FD module to induce flowering under LDs, providing a long-sought mo- lecular knob that links developmental aging and photoperiodic flowering.

关键词： photoperiodic flowering developmental aging SPL transcription factors FT-FD complex

GIGANTEA Shapes the Photoperiodic Rhythms of Thermomorphogenic Growth in Arabidopsis

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molecular Plant 2020年第3期13卷 459-470页

作者： Young-Joon park Jae Young Kim June-Hee Lee Byoung-Doo Lee Nam-Chon Paek chung-mo park Department of Chemistry Seoul National UniversitySeoul 08826Korea Department of Plant Science Seoul National UniversitySeoul 08826Korea Plant Genomics and Breeding Institute Seoul National UniversitySeoul 08826Korea These authors contributed equally to this article

Plants maintain their internal temperature under environments with fluctuating temperatures by adjusting their morphology and architecture,an adaptive process termed ***,the rhythmic patterns of plant thermomorphogenesis are governed by day-length ***,it remains elusive how thermomorphogenic rhythms are regulated by ***,we show that warm temperatures enhance the accumulation of the chaperone GIGANTEA(Gl),which thermostabilizes the DELLA protein,REPRESSOR OF ga1-3(RGA),under long days,thereby attenuating PHYTOCHROME INTERACTING FACTOR 4(PIF4)-mediated *** contrast,under short days,when Gl accumulation is reduced,RGA is readily degraded through the gibberellic acid-mediated ubiquitination-proteasome pathway,promoting thermomorphogenic *** data indicate that the GI-RGA-PIF4 signaling module enables plant thermomorphogenic responses to occur in a day-length-dependent *** propose that the Gl-mediated integration of photoperiodic and temperature information shapes thermomorphogenic rhythms,which enable plants to adapt to diel fluctuations in day length and temperature during seasonal transitions.

关键词： thermomorphogenesis day length Gl RGA PIF4

HOS1 Facilitates the Phytochrome B-Mediated Inhibition of PIF4 Function during Hypocotyl Growth in Arabidopsis

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molecular Plant 2017年第2期10卷 274-284页

作者： Ju-Heon Kim Hyo-Jun Lee Jae-Hoon Jung Sangmin Lee chung-mo park Department of Chemistry Seoul National University Seoul 08826 Korea Sainsbury Laboratory University of Cambridge Cambridge CB2 1LR UK Plant Genomics and Breeding Institute Seoul National University Seoul 08826 Korea These authors contributed equally to this article Present address: SK Innovation Daejeon 34124 Korea

Upon exposure to light, developing seedlings undergo photomorphogenesis, as illustrated by inhibition of hypocotyl elongation, cotyledon opening, and leaf greening. During hypocotyl photomorphogenesis, light signals are sensed by multiple photoreceptors, among which the red/far-red light-sensing phytochromes have been extensively studied. However, it is not fully understood how the phytochromes modulate hypo- cotyl growth. Here, we demonstrated that HIGH EXPRESSION OF OSmoTICALLY RESPONSIVE GENES 1 （HOS1）, which is known to either act as E3 ubiquitin ligase or affect chromatin organization, inhibits the transcriptional activation activity of PHYTOCHROME INTERACTING FACTOR 4 （PIF4）, a key transcrip- tion factor that promotes hypocotyl growth. Consistent with the negative regulatory role of HOSl in hypo- cotyl growth, HOSl-defective mutants exhibited elongated hypocotyls in the light. Notably, phyB induces HOS1 activity in inhibiting PIF4 function. Taken together, these observations provide a molecular basis for the phyB-mediated suppression of hypocotyl growth in Arabidopsis.

关键词： photomorphogenesis hypocotyl growth phytochrome signaling HOS1 PIF4

The Arabidopsis Floral Repressor BFT DelaysFlowering by Competing with FT for FD Bindingunder High Salinity

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molecular Plant 2014年第2期7卷 377-387页

作者： Jae Yong Ryu Hyo-Jun Lee Pil Joon Seo Jae-Hoon Jung Ji Hoon Ahn chung-mo park Department of Chemistry Seoul National University Seoul 151-742 Korea Present address: Department of Chemistry Chonbuk National University Jeonju 561-756 Korea The Sainsbury Laboratory University of Cambridge Cambridge UK Creative Research Initiatives Division of Life Sciences Korea University Seoul 136-701 Korea PGBI Seoul National University Seoul 151-742 Korea

Soil salinity is one of the most serious agricultural problems that significantly reduce crop yields in the aridand semi-arid regions. It influences various phases of plant growth and developmental processes, such as seed germina-tion, leaf and stem growth, and reproductive propagation. Salt stress delays the onset of flowering in many plant spe-cies. We have previously reported that the Arabidopsis BROTHER OF FT AND TFL1 （BFT） acts as a floral repressor undersalt stress. However, the molecular mechanisms underlying the BFT function in the salt regulation of flowering inductionis unknown. In this work, we found that BFT delays flowering under high salinity by competing with FLOWERING LOCUST （FT） for binding to the FD transcription factor. The flowering time of FD-deficient fd-2 mutant was insensitive to highsalinity. BFT interacts with FD in the nucleus via the C-terminal domain of FD, which is also required for the interactionof FD with FT, and interferes with the FT-FD interaction. These observations indicate that BFT constitutes a distinct saltstress signaling pathway that modulates the function of the FT-FD module and possibly provides an adaptation strategythat fine-tunes photoperiodic flowering under high salinity.

关键词： Arabidopsis BFT FD flowering time FT salt stress

Auxin Mediates Adaptation Responses to Both Biotic and Abiotic Stresses in Arabidopsis

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Auxin Mediates Adaptation Responses to Both Biotic and Abiot...

Hepatitis B virus infection, diabetes mellitus, and their synergism for cholangiocarcinoma development: A casecontrol study in Korea

The 3rd Asian and Oceanian Conference on Photobiology

作者： Jung-Eun park Suk Ki Kang Hye-kyoung Youn Pil Joon Seo chung-mo park molecular Signaling Laboratory Department of ChemistrySeoul National UniversitySeoul 151-742Korea molecular Signaling Laboratory Department of ChemistrySeoul National UniversitySeoul 151-742Korea molecular Signaling Laboratory Department of ChemistrySeoul National UniversitySeoul 151-742Korea molecular Signaling Laboratory Department of ChemistrySeoul National UniversitySeoul 151-742Korea molecular Signaling Laboratory Department of ChemistrySeoul National UniversitySeoul 151-742Korea

＜正＞Plants monitor environmental fluctuations constantly to optimize their growth and metabolism;one example is adaptation to biotic and abiotic stresses. Here, we demonstrate that auxin homeostasis is an essential constituent of the complex network of auxin actions that mediates stress adaptation responses. The endogenous auxin pool is regulated through negative feedback by a group of auxin-inducible GH3 genes that encode auxin-conjugating enzymes. The Arabidopsis mutant wesl-D exhibits auxin-deficient traits and was found to overexpress a GH3 gene, WES1. Interestingly, WES1 is activated by pathogenic infections and abiotic stresses as well as by salicylic acid and abscisic acid. Accordingly, wes1-D is resistant to both biotic and abiotic stresses, and stress-regulated genes, including PR-1 and CBFs, are up-regulated in this mutant. We propose that GH3-mediated growth suppression directs reallocation of metabolic resources to resistance responses and provides a role for auxin in the fitness costs of induced resistance in plants.

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World Journal of Gastroenterology 2015年第2期21卷 502-510页

作者： Ban Seok Lee Eun-Cheol park Seung Woo park chung mo Nam Jaehoon Roh Department of Medicine Graduate SchoolYonsei University College of MedicineSeoul 120-752South Korea Digestive Disease Center and Department of Internal Medicine Cheju Halla General HospitalJeju 690-766South Korea Department of Preventive Medicine Yonsei University College of MedicineSeoul 120-752South Korea Institute of Health Services Research Yonsei University College of MedicineSeoul 120-752South Korea Department of Internal Medicine Institute of GastroenterologyYonsei University College of MedicineSeoul 120-752South Korea

AIM: To identify possible risk factors and their synergism for cholangiocarcinoma ***: A hospital-based, case-control study in which we included 276 cholangiocarcinoma patients [193 extrahepatic cholangiocarcinoma(ECC) and 83 intrahepatic cholangiocarcinoma(ICC)], diagnosed at a training hospital in Korea between 2007 and 2013, and 552 healthy controls matched 2:1 for age, sex, and date of diagnosis. Risk factors for cholangiocarcinoma and possible synergism between those factors were evaluated using conditional logistic regression and synergism index, ***:There was an association between cholangiocarcinoma and hepatitis B virus(HBV) infection, diabetes mellitus(DM), cholecystolithiasis, choledocholithiasis, and hepatolithiasis, with the adjusted odds ratios(AORs) of 4.1, 2.6, 1.7, 12.4, and 39.9, respectively. Synergistic interaction on the additive model was investigated between HBV infection and DM(AOR = 12.2; 95%CI: 1.9-80.1). In the subgroup analyses, cholecystolithiasis, choledocholithiasis, hepatolithiasis, and DM were significant risk factors for ECC(AOR = 2.0, 18.1, 14.9, and 2.0, respectively), whereas choledocholithiasis, hepatolithiasis, HBV infection, and DM were risk factors for ICC(AOR = 8.6, 157.4, 5.3 and 4.9, respectively). Synergistic interaction was also observed between HBV infection and DM(OR = 22.7; 95%CI: 2.4-214.1). However, there was no synergistic interaction between other significant risk factors for ***: In this Korean study, HBV infection and DM were found to exert independent and synergistic effects on the risk for cholangiocarcinoma, including ICC. Exploring the underlying mechanismsfor such synergy may lead to the development of cholangiocarcinoma prevention strategies in high-risk individuals.

关键词： Cholangiocarcinoma Risk factor Hepatitis Synergism

Influence of the electrolyte conductivity on the critical current density and the breakdown voltage

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Chinese Journal of Chemical Engineering 2023年第7期59卷 169-175页

作者： Hae-Kyun park Dong-Hyuk park Bum-Jin chung Department of Nuclear Engineering Kyung Hee University 1732 Deogyeong-daeroGiheung-guYongin-siGyeonggi-do 17104Korea

The work investigates influence of the electrolyte conductivity on the onset of partial contact glow discharge electrolysis(CGDE)in a water *** current density(CCD)and breakdown voltage were measured together with in situ observation of hydrogen bubble behavior,whose influence has not been focused *** a fixed current during normal electrolysis,hydrogen coalescence adjacent to cathode surface was invigorated at a lower *** analyses elucidated the hydrogen coalescence characteristics by quantifying size and population of detached hydrogen *** CCD increased about 104% within given range of conductivity(11.50-127.48 mS·cm^(-1))due to impaired bubble coalescence,which delays hydrogen film formation on the ***,decreasing trend of breakdown voltage was measured with increased conductivity showing maximum drop of 74%.It is concluded that onset of partial CGDE is directly affected by hydrodynamic bubble behaviors,whereas the electrolyte conductivity affects the bubble formation characteristics adjacent to cathode electrode.

关键词： Water electrolysis Critical current density Breakdown voltage Electrolyte conductivity Hydrogen bubble behavior

monitoring continuous k-nearest neighbor queries in the hybrid wireless network

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Journal of Zhejiang University-Science C(Computers and Electronics) 2011年第3期12卷 213-220页

作者： Young-mo KWON HaRim JUNG Yon Dohn chung Department of Computer Science and Engineering Korea UniversitySeoul 136-713Korea

In a mobile/pervasive computing environment,one of the most important goals of monitoring continuous spatial queries is to reduce communication cost for *** work uses many cellular wireless connections,which would easily become the performance bottleneck of the overall *** paper introduces a novel continuous kNN query monitoring method to reduce communication cost in the hybrid wireless network,where the moving objects in the wireless broadcasting system construct the ad-hoc *** results prove the efficiency of the proposed method,which leverages the wireless broadcasting channel as well as the WiFi link to alleviate the burden on the cellular uplink communication cost.

关键词： Continuous kNN query monitoring Ad-hoc networks Wireless broadcasting systems

Rapidly growing primary anal canal lymphoma:a case report and literature review

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Gastroenterology Report 2023年第1期11卷 582-584页

作者： Yu Kyung chung Su Bum park Department of Internal Medicine Pusan National University School of Medicine and Research Institute for Convergence of Biomedical Science and TechnologyPusan National University Yangsan HospitalYangsanRepublic of Korea

Introduction Anal cancer is a rare cancer accounting for2%of all gastrointestinal tract malignancies[1].Among anal cancers,squamous cell cancer(SCC)is the most common and lymphoma is one of the least *** gastrointestinal tract is the most common site for extranodal non-Hodgkin’s lymphoma(NHL),and diffuse large B-cell lymphoma(DLBCL)is the most common histologic ***,primary colorectal lymphoma accounts for only 0.3%of all large intestinal malignancies and3%of all gastrointestinal lymphomas[2].Anal canal SCC and lymphomas are treated differently;thus,accurate diagnosis is crucial.

关键词： lymphoma gastrointestinal diagnosis