Won-Chan Kim

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MYB46 functions as a transcriptional switch that turns on the genes necessary for secondary wall biosynthesis. Elucidating the transcriptional regulatory network immediately downstream of MYB46 is crucial to our understanding of the molecular and biochemical processes involved in the biosynthesis and deposition of secondary walls in plants. To gain insights(More)
While many aspects of primary cell wall have been extensively elucidated, our current understanding of secondary wall biosynthesis is limited. Recently, transcription factor MYB46 has been identified as a master regulator of secondary wall biosynthesis in Arabidopsis thaliana. To gain better understanding of this MYB46-mediated transcriptional regulation,(More)
Cellulose is the most abundant biopolymer on Earth. Three cellulose synthases (CESA4, CESA7 and CESA8) are necessary for cellulose production in the secondary cell walls of Arabidopsis. Little is known about how expression of these CESA genes is regulated. We recently identified a cis-regulatory element (M46RE) that is recognized by MYB46, which is a master(More)
Cellulose, the most abundant biopolymer on Earth, is a central component in plant cell walls and highly abundant (up to 50%) in the secondary walls. In Arabidopsis thaliana, the cellulose biosynthesis in the secondary walls is catalyzed by three cellulose synthases CESA4, CESA7 and CESA8. The transcription factor MYB46 and its close homolog MYB83 directly(More)
The timing of the onset and release of dormancy impacts the survival, productivity and spatial distribution of temperate horticultural and forestry perennials and is mediated by at least three main regulatory programs involving signal perception and processing by phytochromes (PHYs) and PHY-interacting transcription factors (PIFs). PIF4 functions as a key(More)
AtC3H14 (At1 g66810) is a plant-specific tandem CCCH zinc-finger (TZF) protein that belongs to the 68-member CCCH family in Arabidopsis thaliana. In animals, TZFs have been shown to bind and recruit target mRNAs to the cytoplasmic foci where mRNA decay enzymes are active. However, it is not known whether plant TZF proteins such as AtC3H14 function. So far,(More)
Anthocyanins are a group of colorful and bioactive natural pigments with important physiological and ecological functions in plants. We found an MYB transcription factor (PtrMYB119) from Populus trichocarpa that positively regulates anthocyanin production when expressed under the control of the CaMV 35S promoter in transgenic Arabidopsis Amino acid sequence(More)
Mannans are hemicellulosic polysaccharides that have a structural role and serve as storage reserves during plant growth and development. Previous studies led to the conclusion that mannan synthase enzymes in several plant species are encoded by members of the cellulose synthase-like A (CSLA) gene family. Arabidopsis has nine members of the CSLA gene(More)
The ethyl acetate extract of the Bacillus sp. EJ-121 culture broth exhibited growth inhibitory activity on a lettuce (Lactuca sativa L.) seedlings assay. Bacillus sp. EJ-121 was identified as Bacillus cereus by the morphological characteristic and nucleotide sequence of the 16S rDNA. The bioassay-guided fractionation of the ethyl acetate extract led to the(More)