catharanthus/carbohydrate

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Abnormalities in carbohydrate and lipid metabolisms in high-fructose dietfed insulin-resistant rats: amelioration by Catharanthus roseus treatments.

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High intake of dietary fructose has been shown to exert a number of adverse metabolic effects in humans and experimental animals. The present study was proposed to elucidate the effect of Catharanthus roseus (C. roseus) leaf powder treatment on alterations in carbohydrate and lipid metabolisms in

Visualization of vacuoplasts in isolated vacuole preparations from mesophyll protoplasts of periwinkle [Catharanthus roseus (L.) G. Don].

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A procedure was developed for the rapid detection of vacuoplasts in vacuole preparations isolated from mesophyll protoplasts of Catharanthus roseus (L.) G. Don (periwinkle). The procedure relies on the staining of surface carbohydrates on the plasma membrane surrounding vacuoplasts with

Growth and stoichiometry of a Catharanthus roseus cell suspension culture grown under nitrogen-limiting conditions.

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The uptake of carbohydrate and nitrate by Catharanthus roseus cell suspension cultures was studied in relation to biomass production in shake flasks. Biomass production was similar when using either 6, 12, 18, or 24 mM nitrate as the nitrogen source and 20 g L(-1) sucrose as the carbon source. In

Sugar import and phytopathogenicity of Spiroplasma citri: glucose and fructose play distinct roles.

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We have shown previously that the glucose PTS (phosphotransferase system) permease enzyme II of Spiroplasma citri is split into two distinct polypeptides, which are encoded by two separate genes, crr and ptsG. A S. citri mutant was obtained by disruption of ptsG through homologous recombination and

Effect of culture process on alkaloid production by Catharanthus roseus cells. I. Suspension cultures.

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The processes for production of indole alkaloids in shake flask suspension cultures of Catharanthus roseus cells using Zenk's alkaloid production medium (APM) were evaluated. The 1-stage process consisted of inoculating APM and incubating for 15 days. The 2-stage process involved 6 d of cultivation

A simple structured model for maintenance, biomass formation, and ajmalicine production by nondividing Catharanthus roseus cells.

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The stoichiometry of maintenance and carbohydrate storage as well as ajmalicine production kinetics of non-dividing Catharanthus roseus cells in the second stage of a two-stage batch process were investigated. For the mathematical description of these processes, a simple structured model with 5

Effect of culture process on alkaloid production by Catharanthus roseus cells. II. Immobilized cultures.

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Two processes for the production of indole alkaloids 2 l surface-immobilized bioreactor cultures of Catharanthus roseus cells using Zenk's Alkaloid Production Medium (APM) were evaluated. The 1-stage process consisted of inoculating APM containing bioreactors and incubating for 15 d. The 2-stage

Large-scale (20 l) culture of surface-immobilized Catharanthus roseus cells.

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Surface-immobilized C. roseus cell cultures were grown in a 20-l modified airlift bioreactor operated at 0.51 vvm (kLa approximately 8 h-1) under various gassing regimes [air, 2% (v/v) and 5% CO2]. Extracellular ammonium, phosphate, and nitrate ions as well as carbohydrate uptake and pH value of the

Biotransformation of tryptamine and secologanin into plant terpenoid indole alkaloids by transgenic yeast.

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A transgenic Saccharomyces cerevisiae was constructed containing the cDNAs coding for strictosidine synthase (STR) and strictosidine beta-glucosidase (SGD) from the medicinal plant Catharanthus roseus. Both enzymes are involved in the biosynthesis of terpenoid indole alkaloids. The yeast culture was

Fructose utilization and phytopathogenicity of Spiroplasma citri.

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Spiroplasma citri is a plant-pathogenic mollicute. Recently, the so-called nonphytopathogenic S. citri mutant GMT 553 was obtained by insertion of transposon Tn4001 into the first gene of the fructose operon. Additional fructose operon mutants were produced either by gene disruption or selection of

Gene expression profiling of phytoplasma-infected Madagascar periwinkle leaves using differential display.

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Phytoplasmas are small (0.2-0.8 μm), wall-less, pleiomorphic prokaryotes responsible of numerous economically important plant diseases. They are characterized by a very small genome and are obligate parasites of phloem tissues and some insects that act as vectors of infection. To investigate

Extensin arabinoside chain length is modulated in elongating cotton fibre

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Cotton fibre provides a unicellular model system for studying cell expansion and secondary cell wall deposition. Mature cotton fibres are mainly composed of cellulose while the walls of developing fibre cells contain a variety of polysaccharides and proteoglycans required for cell expansion. This

Genomic Characterization of the Periwinkle Leaf Yellowing (PLY) Phytoplasmas in Taiwan.

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The periwinkle leaf yellowing (PLY) disease was first reported in Taiwan in 2005. This disease was caused by an uncultivated bacterium in the genus "Candidatus phytoplasma." In subsequent years, this bacterium was linked to other plant diseases and caused losses in agriculture. For

Genome-wide identification and analysis of Catharanthus roseus RLK1-like kinases in rice.

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CONCLUSIONS A genome-wide survey of Catharanthus roseus receptor-like kinase1-like kinases (CrRLK1Ls) in rice revealed that the pattern of expression by some CrRLK1Ls is controlled by drought or circadian rhythms. This is probably accomplished through the functioning of Gigantea ( OsGI ). Such

Biochemical differences between trail mucus and adhesive mucus from marsh periwinkle snails.

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The composition of the adhesive form of marsh periwinkle mucus was compared to the trail mucus used during locomotion. The trail mucus consists primarily of large, carbohydrate-rich molecules with some relatively small proteins. In contrast, the adhesive mucus has 2.7 times as much protein with no

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