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vindoline/tapak dara
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Vindoline synthesis in in vitro shoot cultures of Catharanthus roseus.
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Vindoline, the major alkaloid in cultures of Catharanthus roseus shoots, reached 2 mg g(-1) dry wt after 27 d in culture. Maximal vindoline accumulation coincided with maximum activities of deacetoxyvindoline 4-hydroxylase, deacetylvindoline acetyl-CoA acetyl transferase and tryptophan
[Simultaneous determination of vindoline, catharanthine and anhydrovinblastine in Catharanthus roseus by high performance liquid chromatography].
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A high performance liquid chromatographic (HPLC) method with gradient elution was developed for the simultaneous determination of vindoline, catharanthine and anhydrovinblastine in Catharanthus roseus. The analytes were separated on a Waters (5)C18-MS-II column (4.6 mm x 250 mm) and detected at 220
Isolation of vindoline from Catharanthus roseus by supercritical fluid extraction.
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Vindoline was extracted from the leaves of Catharanthus roseus over the ranges of 35-70 degrees C and 100-300 bar using supercritical carbon dioxide with and without the addition of 3 wt % ethanol as a cosolvent. The vindoline contents in the extracts were determined by HPLC and identified by LC/MS.
Vindoline biosynthesis is transcriptionally blocked in Catharanthus roseus cell suspension cultures.
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Catharanthus roseus cell cultures were exposed to different conditions in order to induce alkaloid metabolism. The exposure to jasmonate and fungal elicitors resulted in the transcriptional activation of tryptophan decarboxylase and in the accumulation of the monoterpenoid indole alkaloids
Vindoline formation in shoot cultures of Catharanthus roseus is synchronously activated with morphogenesis through the last biosynthetic step.
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OBJECTIVE
The Madagascar periwinkle (Catharanthus roseus) produces the monoterpenoid alkaloid vindoline, which requires a specialized cell organization present only in the aerial tissues. Vindoline content can be affected by photoperiod and this effect seems to be associated with the morphogenetic
Mass Spectral Evidence of the Occurrence of Vindoline in Heterotrophic Cultures of Catharanthus roseus Cells.
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Vindoline concentrations in the leaves of 70 CATHARANTHUS ROSEUS of 3 cultivars were analyzed by HPLC, and 3 plants were selected for starting callus cultures on different media. When the initial calli were analyzed using a vindoline-specific RIA, the assay suggested a vindoline content of about 10
[Distribution and accumulation of vindoline, catharanthine and vinblastine in Catharanthus roseus cultivated in China].
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OBJECTIVE
The content of vindoline, catharanthine and vinblastine in the root, stem, leaf, flower and fruit of Catharanthus roseus at various developmental stages were determined, and the biomass allocation was also determined to find the best harvest time.
METHODS
The content of vindoline,
Enhancement of vindoline production in suspension culture of the Catharanthus roseus cell line C20hi by light and methyl jasmonate elicitation.
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The effects of light and methyl jasmonate (MJ) on the transcription of biosynthetic genes as well as the accumulation of vindoline and catharanthine in Catharanthus roseus C20hi cell suspensions were studied. t16h (the gene encoding tabersonine 16-hydroxylase) could be induced by light and MJ,
Simultaneous determination of vincristine, vinblastine, catharanthine, and vindoline in leaves of catharanthus roseus by high-performance liquid chromatography.
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A simple reversed-phase liquid chromatographic method is developed for the simultaneous quantitation of the anticancerous drugs vincristine, vinblastine, and their precursors catharanthine and vindoline using a Merck Chromolith Performance reversed-phase high-performance liquid chromatography
Increased availability of tryptophan in 5-methyltryptophan-tolerant shoots of Catharanthus roseus and their postharvest in vivo elicitation induces enhanced vindoline production.
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Ten 5-methyltryprophan (5-MT)-resistant multiple shoot culture lines in three genotypes of Catharanthus roseus were selected in vitro. The variant shoot lines displayed a differential threshold tolerance limit against the analogue stress, ranged from 20 to 70 mg/l 5-MT in the medium. The lines
Identification of a low vindoline accumulating cultivar of Catharanthus roseus (L.) G. Don by alkaloid and enzymatic profiling.
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The Madagascar periwinkle [Catharanthus roseus (L.) G. Don] is a commercially important horticultural flower species and is the only source of the monoterpenoid indole alkaloids (MIAs), vinblastine and vincristine, key pharmaceutical compounds used to combat a number of different cancers. The
Light activation of vindoline biosynthesis does not require cytomorphogenesis in Catharanthus roseus seedlings.
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Upon illumination, the cotyledons of Catharanthus roseus seedlings readily synthesise vindoline from late biosynthetic intermediates, which accumulate in etiolated seedlings. The cellular localisation of tryptophan decarboxylase (TDC) and desacetoxyvindoline 4-hydroxylase (D4H), which catalyse the
Screening 64 cultivars Catharanthus roseus for the production of vindoline, catharanthine, and serpentine.
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The leaves of Catharanthus roseus (L.) G. Don. are a valuable source of the terpenoid indole alkaloid (TIA) anticancer drugs, vinblastine and vincristine. In particular, the precursor molecules vindoline and catharanthine are harvested from leaves and used for the semisynthetic production of
Effects of β-cyclodextrin and methyl jasmonate on the production of vindoline, catharanthine, and ajmalicine in Catharanthus roseus cambial meristematic cell cultures.
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Long-term stable cell growth and production of vindoline, catharanthine, and ajmalicine of cambial meristematic cells (CMCs) from Catharanthus roseus were observed after 2 years of culture. C. roseus CMCs were treated with β-cyclodextrin (β-CD) and methyl jasmonate (MeJA) individually or in
Localization of tabersonine 16-hydroxylase and 16-OH tabersonine-16-O-methyltransferase to leaf epidermal cells defines them as a major site of precursor biosynthesis in the vindoline pathway in Catharanthus roseus.
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The Madagascar periwinkle (Catharanthus roseus) produces the well known and remarkably complex anticancer dimeric alkaloids vinblastine and vincristine, which are derived by the coupling of vindoline and catharanthine monomers. Recent data from in situ RNA hybridization and immunolocalization
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