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Chinese cabbage plants remain in the vegetative growth phase until they have experienced prolonged exposure to cold temperature, known as vernalization. This inhibition of flowering is caused by the high levels of FLOWERING LOCUS C (FLC) expression. To increase the product value of Chinese cabbage by inhibiting the floral transition, three genes (BrFLC1,(More)
Three Arabidopsis cDNAs, MAM1, CYP79F1, and CYP83A1, required for aliphatic glucosinolate biosynthesis were introduced into Chinese cabbage by Agrobacterium tumefaciens-mediated transformation. The transgenic lines overexpressing MAM1 or CYP83A1 showed wild-type phenotypes. However, all the lines overexpressing CYP79F1 displayed phenotypes different from(More)
Paeonol, a major phenolic component of Moutan Cortex, was known to have antiaggregatory, antioxidant and antiinflammatory activities. In the present study, we tried to elucidate the effects of paeonol on anaphylactic reaction and its mode of action. Paeonol significantly inhibited histamine release from the rat peritoneal mast cells (RPMCs) treated with(More)
SmD3 is a core protein of small nuclear ribonucleoprotein (snRNP) essential for splicing of primary transcripts. To elucidate function of SmD3 protein in plants, phenotypes and gene expression of SmD3 knock-out and overexpressing mutants in Arabidopsis have been analyzed. smd3-a knock-out mutant or SmD3-a and SmD3-b overexpressors did not show phenotypic(More)
BACKGROUND Scutellaria barbata D.Don has been applied to treat cancers, inflammation and urinary disease. However, its antitumor mechanism still remains unclear. METHODS With methylene chloride fraction of Herba Scutellariae barbatae (MCSB), apoptosis-related experiments were carried out on human U937 leukemia cells by (a)(More)
To test the influence of a Nicotiana tomentosiformis repetitive sequence (R8.3) on transgene expression in N. sylvestris and in N. sylvestris-N. tomentosiformis hybrids, the R8.3 sequence was placed upstream of a nopaline synthase promoter (NOSpro)-NPTII reporter gene in a T-DNA construct. A number of transgenic N. sylvestris lines were produced and in(More)
In this study, we applied insertional mutagenesis using Agrobacterium transfer DNA to functionally characterize the gene of Brassica rapa L. ssp. pekinensis. The specific objectives were to: (i) develop and apply a gene tagging system using plasmid rescue and inverse PCR, (ii) select and analyze mutant lines, and (iii) analyze the phenotypic characteristics(More)
A full length cDNA encoding the SAM synthetase gene was isolated from Chinese cabbage by RT-PCR and contains a 1,182 bp open reading frame encoding a putative 393 amino acid protein. This cDNA insert was subcloned into the pET15b vector to evaluate the expression and further characterize the SAMS gene. Recombinant SAMS was also generated in BL21 cells and(More)
Two new triterpenoids along with three known ones, 3-oxoolean-12-en-27-oic acid (1), 3alpha-hydroxyolean-12-en-27-oic acid (2) and 3beta-hydroxyolean-12-en-27-oic acid (3), were isolated from Aceriphyllum rossii. The structures of the new compounds were determined to be a 3alpha,23-dihydroxyolean-12-en-27-oic acid (4) and a(More)
S-adenosyl-L-methionine synthetase (SAMS) catalyzes the synthesis of S-adenosyl-L-methionine, a molecule which functions as the methyl group donor in the biosynthesis of nucleic acids, proteins, lipids, polysaccharides, and secondary products. To analyze the physiological role of endogenous S-adenosyl-L-methionine synthetase, Chinese cabbage was transformed(More)