A5087655177- Plant Molecular Biology Research
- Photosynthetic Processes and Mechanisms
- Plant Gene Expression Analysis
- Plant Stress Responses and Tolerance
- Light effects on plants
- Plant Reproductive Biology
- GABA and Rice Research
- Genetic Mapping and Diversity in Plants and Animals
- Plant nutrient uptake and metabolism
- Rice Cultivation and Yield Improvement
- Chromosomal and Genetic Variations
- Plant tissue culture and regeneration
- Seed Germination and Physiology
- Plant biochemistry and biosynthesis
- Plant Disease Resistance and Genetics
- Agriculture, Soil, Plant Science
- Plant-Microbe Interactions and Immunity
- Plant responses to water stress
- Soybean genetics and cultivation
- Plant Surface Properties and Treatments
- Plant Virus Research Studies
- Nitrogen and Sulfur Effects on Brassica
- Legume Nitrogen Fixing Symbiosis
- Silicon Effects in Agriculture
- Plant Micronutrient Interactions and Effects
Seoul National University
2015-2024
National University College
2023
New Generation University College
2023
Seoul National University of Science and Technology
2013-2015
Kyushu University
2009
Iowa State University
1998
Summary The floral transition in Arabidopsis is regulated by at least four flowering pathways: the long‐day, autonomous, vernalization, and gibberellin (GA)‐dependent pathways. Previously, we reported that MADS‐box transcription factor S UPPRESSOR OF O VEREXPRESSION C 1 (SOC1) integrates long‐day vernalization/autonomous Here, present evidences SOC1 also signaling from GA‐dependent pathway, a major pathway under non‐inductive short days. Under days, time of GA‐biosynthetic ‐signaling mutants...
Abstract Loss of green color in leaves results from chlorophyll (Chl) degradation chloroplasts, but little is known about how Chl catabolism regulated throughout leaf development. Using the staygreen (sgr) mutant rice (Oryza sativa), which maintains greenness during senescence, we identified Sgr, a senescence-associated gene encoding novel chloroplast protein. Transgenic overexpressing Sgr produces yellowish-brown leaves, and Arabidopsis thaliana pheophorbide oxygenase–impaired mutants...
During leaf senescence, plants degrade chlorophyll to colorless linear tetrapyrroles that are stored in the vacuole of senescing cells. The early steps breakdown occur plastids. To date, five catabolic enzymes (CCEs), NONYELLOW COLORING1 (NYC1), NYC1-LIKE, pheophytinase, pheophorbide a oxygenase (PAO), and red catabolite reductase, have been identified; these catalyze stepwise degradation fluorescent intermediate, pFCC, which is then exported from plastid. In addition, STAY-GREEN (SGR),...
Drought and other abiotic stresses negatively affect plant growth development thus reduce productivity. The plant-specific NAM/ATAF1/2/CUC2 (NAC) transcription factors have important roles in stress-responsive signaling. Here, we show that Arabidopsis thaliana NAC016 is involved drought stress responses; nac016 mutants high tolerance, NAC016-overexpressing (NAC016-OX) plants low tolerance. Using genome-wide gene expression microarray analysis MEME motif searches, identified the...
Drought is one of the major abiotic stresses that directly implicate plant growth and crop productivity. Although many genes in response to drought stress have been identified, genetic improvement resistance especially food crops showing relatively slow progress worldwide. Here, we reported isolation abscisic acid, ripening (ASR) from upland rice variety, IRAT109 (Oryza sativa L. ssp. japonica), demonstrated overexpression OsASR5 enhanced osmotic tolerance Escherichia coli Arabidopsis by...
During crop cultivation, water-deficit conditions retard growth, thus reducing productivity. Therefore, uncovering the mechanisms behind drought tolerance is a critical task for improvement. Here, we show that rice (Oryza sativa) WRKY transcription factor OsWRKY5 negatively regulates tolerance. We determined was mainly expressed in developing leaves at seedling and heading stages, its expression reduced by stress treatment with NaCl, mannitol, abscisic acid (ABA). Notably, genome-edited...
Abstract The virescent3 (v3) and stripe1 (st1) mutants in rice (Oryza sativa) produce chlorotic leaves a growth stage-dependent manner under field conditions. They are temperature-conditional that bleached at constant 20°C or 30°C but almost green diurnal 30°C/20°C Here, we show V3 St1, which encode the large small subunits of ribonucleotide reductase (RNR), RNRL1, RNRS1, respectively. RNR regulates rate deoxyribonucleotide production for DNA synthesis repair. RNRL1 RNRS1 highly expressed...
Summary In order to understand the molecular genetic mechanisms of rice ( O ryza sativa ) organ development, we studied narrow leaf2 leaf3 nal2 nal3 ; hereafter nal2/3 double mutant, which produces narrow‐curly leaves, more tillers, fewer lateral roots, opened spikelets and narrow‐thin grains. We found that leaves resulted mainly from reduced lateral‐axis outgrowth with longitudinal veins more, larger bulliform cells. Opened spikelets, possibly caused by marginal deformity in lemma, gave...
NADPH:protochlorophyllide oxidoreductase (POR) catalyzes photoreduction of protochlorophyllide (Pchlide) to chlorophyllide in chlorophyll (Chl) synthesis, and is required for prolamellar body (PLB) formation etioplasts. Rice faded green leaf (fgl) mutants develop yellow/white variegation necrotic lesions during elongation field-grown plants. Map-based cloning revealed that FGL encodes OsPORB, one two rice POR isoforms. In fgl, etiolated seedlings contained smaller PLBs etioplasts, lower...
To expand our understanding of cell death in plant defense responses, we isolated a novel rice (Oryza sativa) spotted leaf mutant (spl28) that displays lesion mimic phenotype the absence pathogen attack through treatment Hwacheongbyeo (an elite Korean japonica cultivar) with N-methyl-N-nitrosourea (MNU). Early stage development spl28 was normal. However, after flowering, mutants exhibited significant decrease chlorophyll content, soluble protein and photosystem II efficiency, high...
The highly ordered process of senescence forms the final stage leaf development; a large set senescence-associated genes (SAGs) execute this orderly dismantling photosynthetic apparatus and remobilization cellular components. A number transcription factors (TFs) modulate SAG expression to promote or delay senescence. Here we show that NAC016, previously uncharacterized NAM/ATAF1/2/CUC2 (senNAC) TF in Arabidopsis thaliana, promotes Leaves nac016 mutants remained green under...
NAM/ATAF1/ATAF2/CUC2 (NAC) is a plant-specific transcription factor (TF) family, and NACs participate in many diverse processes during the plant life cycle. Several Arabidopsis thaliana have important roles positively or negatively regulating leaf senescence, but other species, including rice, senescence-associated (senNACs) remain largely unknown. Here we show that rice senNAC TF ONAC106 regulates senescence. Leaves of onac106-1D (insertion 35S enhancer promoter region gene) mutants...
Jasmonic acid (JA) functions in plant development, including senescence and immunity. Arabidopsis thaliana CORONATINE INSENSITIVE 1 encodes a JA receptor the JA-responsive signaling pathway. The genome harbors single COI gene, but rice (Oryza sativa) three homologs, OsCOI1a, OsCOI1b, OsCOI2. Thus, it remains unclear whether each OsCOI has distinct, additive, synergistic, or redundant development. Here, we use oscoi1b-1 knockout mutants to show that OsCOI1b mainly affects leaf under...
In most plants, abscisic acid (ABA) induces premature leaf senescence; however, the mechanisms of ABA signaling during senescence remain largely unknown. Here, we show that rice (
Expansins are key regulators of cell-wall extension and also involved in the abiotic stress response. In this study, we evaluated function OsEXPA7 salt tolerance. Phenotypic analysis showed that overexpression remarkably enhanced tolerance to stress. was highly expressed shoot apical meristem, root, leaf sheath. Promoter activity OsEXPA7:GUS mainly observed vascular tissues roots leaves. Morphological revealed structural alterations root vasculature overexpressing (OX) lines. resulted...
Summary Arabidopsis EARLY FLOWERING 3 ( ELF 3) functions in modulating light input to the circadian clock, as a component of 3‐ 4‐ LUX ARRHYTHMO ) evening complex. However, role stress responses remains largely unknown. In this study, we show that enhances plants’ resilience salt stress: ‐overexpressing ‐ OX plants are salt‐tolerant, while elf3 mutants more sensitive stress. The expressions many stress‐ and senescence‐associated genes altered elf3‐1 compared with wild‐type. During stress,...
In Arabidopsis thaliana, CONSTANS (CO) plays an essential role in the regulation of photoperiodic flowering under long-day conditions. CO protein is stable only afternoon long days, when it induces expression FLOWERING LOCUS T (FT), which promotes flowering. The blue-light photoreceptor FLAVIN-BINDING, KELCH REPEAT, F-BOX1 (FKF1) interacts with and stabilizes by unknown mechanism. Here, we provide genetic biochemical evidence that FKF1 inhibits CONSTITUTIVE PHOTOMORPHOGENIC1 (COP1)-dependent...
Plant autophagy, one of the essential proteolysis systems, balances proteome and nutrient levels in cells whole plant. Autophagy has been studied by analysing Arabidopsis thaliana autophagy-defective atg mutants, but relationship between autophagy chlorophyll (Chl) breakdown during stress-induced leaf yellowing remains unclear. During natural senescence or under abiotic-stress conditions, extensive cell death early occurs leaves mutants. A new finding is revealed that atg5 atg7 mutants...