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| 1 | Expression of a High Mobility Group Protein Isolated from Cucumis sativus Affects the Germination of Arabidopsis thaliana under Abiotic Stress Conditions显示文摘Although high mobility group B (HMGB) proteins have been identified from a variety of plant species,their importance and functional roles in plant responses to changing environmental conditions are largely unknown. Here,we investigated the functional roles of a CsHMGB isolated from cucumber (Cucumis sativus L.) in plant responses to environmental stimuli. Under normal growth conditions or when subjected to cold stress,no differences in plant growth were found between the wild-type and transgenic Arabidopsis thaliana overexpressing CsHMGB. By contrast,the transgenic Arabidopsis plants displayed retarded germination compared with the wild-type plants when grown under high salt or dehydration stress conditions. Germination of the transgenic plants was delayed by the addition of abscisic acid (ABA),implying that CsHMGB affects germination through an ABA-dependent way. The expression of CsHMGB had affected only the germination stage,and CsHMGB did not affect the seedling growth of the transgenic plants under the stress conditions. The transcript levels of several germination-responsive genes were modulated by the expression of CsHMGB in Arabidopsis. Taken together,these results suggest that ectopic expression of a CsHMGB in Arabidopsis modulates the expression of several germination-responsive genes,and thereby affects the germination of Arabidopsis plants under different stress conditions. | Ji Young Jang Kyung Jin Kwak Hunseung Kang | 2008 | Journal of Integrative Plant Biology2008，50，5： | 3 |
| 2 | An Expression Analysis of a Gene Family Encoding Plasma Membrane Aquaporins in Response to Abiotic Stresses in Arabidopsis Thaliana显示文摘 | Ji Young Jang Dong Gu Kim Yeon Ok Kim Jin Sun Kim Hunseung Kang | 2004 | Plant Molecular Biology2004，，5： | 1 |
| 3 | Molecular cloning and characterization of a functional cDNA clone encoding isopentenyl diphosphate isomer- ase from Hevea brasiliensis 显示文摘 | Soo Kyung Oh Hunseung Kang Dong Ho Shin Jaemo Yang Kyung-Hwan Han | 2000 | Journal Plant Physiology2000，157，： | 1 |
| 4 | N4-methylcytidine ribosomal RNA methylation in chloroplasts is crucial for chloroplast function,development,and abscisic acid response in Arabidopsis显示文摘Although the essential role of messenger RNA methylation in the nucleus is increasingly understood,the nature of ribosomal RNA(rRNA)methyltransferases and the role of rRNA methylation in chloroplasts remain largely unknown.A recent study revealed that CMAL(for Chloroplast mraW-Like)is a chloroplast-localized rRNA methyltransferase that is responsible for N4-methylcytidine(m^(4)C)in 16S chloroplast rRNA in Arabidopsis thaliana.In this study,we further examined the role of CMAL in chloroplast biogenesis and function,development,and hormone response.The cmal mutant showed reduced chlorophyll biosynthesis,photosynthetic activity,and growth-defect phenotypes,including severely stunted stems,fewer siliques,and lower seed yield.The cmal mutant was hypersensitive to chloroplast translation inhibitors,such as lincomycin and erythromycin,indicating that the m^(4)C methylation defect in the 16S rRNA leads to a reduced translational activity in chloroplasts.Importantly,the stunted stem of the cmal mutant was partially rescued by exogenous gibberellic acid or auxin.The cmal mutant grew poorer than wild type,whereas the CMAL-overexpressing transgenic Arabidopsis plants grew better than wild type in the presence of abscisic acid.Altogether,these results indicate that CMAL is an indispensable rRNA methyltransferase in chloroplasts and is crucial for chloroplast biogenesis and function,photosynthesis,and hormone response during plant growth and development. | Le Nguyen Tieu Ngoc Su Jung Park Trinh Thi Huong Kwang Ho Lee Hunseung Kang | 2021 | Journal of Integrative Plant Biology2021，63，3： | 1 |
| 5 | The role of a zinc finger-containing glycine-rich RNA-binding protein during the cold adaptation process in Arabidopsis thaliana显示文摘 | Kim Yeon Ok Kang Hunseung | 2006 | Plant and cell physiology2006，47，6： | 1 |
| 6 | An Expression Analysis of a Gene Family Encoding Plasma Membrane Aquaporins in Response to Abiotic Stresses in Arabidopsis Thaliana显示文摘 | Ji Young Jang Dong Gu Kim Yeon Ok Kim Jin Sun Kim Hunseung Kang | 2004 | Plant Molecular Biology2004，，5： | 1 |
| 7 | Transgenic Arabidopsis and tobacco plants overexpressing an aquaporin respond differently to various abiotic stresses显示文摘 | Ji Young Jang Seong Hee Lee Ji Ye Rhee Gap Chae Chung Sung Ju Ahn Hunseung Kang | 2007 | Plant Molecular Biology2007，，6： | 1 |
| 8 | Hydrogen peroxide permeability of plasma membrane aquaporins of Arabidopsis thaliana显示文摘 | Cortwa Hooijmaijers Ji Ye Rhee Kyung Jin Kwak Gap Chae Chung Tomoaki Horie Maki Katsuhara Hunseung Kang | 2012 | Journal of Plant Research2012，，1： | 1 |
| 9 | Transgenic Arabidopsis and tobacco plants overexpressing an aquaporin respond differently to various abiotic stresses显示文摘 | Ji Young Jang Seong Hee Lee Ji Ye Rhee Gap Chae Chung Sung Ju Ahn Hunseung Kang | 2007 | Plant Molecular Biology2007，，6： | 1 |
| 10 | FLK is an mRNA m^(6)A reader that regulates floral transition by modulating the stability and splicing of FLC in Arabidopsis显示文摘N^(6)-methyladenosine(m^(6)A),which is added,removed,and interpreted by m^(6)A writers,erasers,and readers,respectively,is the most abundant modification in eukaryotic mRNAs.The m^(6)A marks play a pivotal role in the regulation of floral transition in plants.FLOWERING LOCUS K(FLK),an RNA-binding protein harboring K-homology(KH)motifs,is known to regulate floral transition by repressing the levels of a key floral repressor FLOWERING LOCUS C(FLC)in Arabidopsis.However,the molecular mechanism underlying FLK-mediated FLC regulation remains unclear.In this study,we identified FLK as a novel mRNA m^(6)A reader protein that directly binds the m^(6)A site in the 3ʹ-untranslated region of FLC transcripts to repressing FLC levels by reducing its stability and splicing.Importantly,FLK binding of FLC transcripts was abolished in vir-1,an m^(6)A writer mutant,and the late-flowering phenotype of the flk mutant could not be rescued by genetic complementation using the mutant FLKm gene,in which the m^(6)A reader encoding function was eliminated,indicating that FLK binds and regulates FLC expression in an m^(6)A-dependent manner.Collectively,our study has addressed a long-standing question of how FLK regulates FLC transcript levels and established a molecular link between the FLK-mediated recognition of m^(6)A modifications on FLC transcripts and floral transition in Arabidopsis. | Umme Amara Jianzhong Hu Jing Cai Hunseung Kang | 2023 | Molecular Plant2023，16，5： | 0 |
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