Vinca Rosea
Mostrando 1-12 de 20 artigos, teses e dissertações.
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1. Phytophthora nicotianae e Rhizoctonia solani: dois novos patógenos da vinca no Brasil.
2007
Brasília. Publicado em: 2011
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2. Alternative extraction of alkaloid anticarcinogens from Brazilian "vinca rosea" using Ion exchange chromatography
Extracts in ethanol and ethanol-ammonia of dried leaves from Catharanthus roseus, gathered at Rio de Janeiro state, were adsorbed in a strongly acidic cation exchange resin with sulfonic acid group, using the finite bath method, resulting in an alkaloid retained fraction and an acidic and neutral unretained fraction. High Performance Liquid Chromatography sh
Revista Brasileira de Farmacognosia. Publicado em: 2002
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3. Glucosyl Zeatin and Glucosyl Ribosylzeatin from Vinca rosea L. Crown Gall Tumor Tissue 1
Recently detected but unidentified cytokinin activity in crown gall tumor tissue from Vinca rosea L. grown on media containing sources of reduced nitrogen has now been attributed to two adenine-type cytokinins. These compounds are glucopyranosyl derivatives of zeatin and ribosylzeatin. The substitution in each case is on the isopentenyl chain of the parent c
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4. Cell-division factors from Vinca rosea L. crown gall tumor tissue
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5. ON THE ACTIVATION OF CERTAIN ESSENTIAL BIOSYNTHETIC SYSTEMS IN CELLS OF VINCA ROSEA L*
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6. Mass Spectroscopic Identification of Cytokinins: Glucosyl Zeatin and Glucosyl Ribosylzeatin from Vinca rosea Crown Gall 1
Mass spectrographic and chemical studies of the permethyl and trimethylsilyl ethers of two new cytokinins isolated from Vinca rosea crown gall callus cultures by Peterson and Miller (Plant Physiol 59: 1026-1028) indicate that they are 6-(4-0-β-d-glucopyranosyl-3-methyl-trans-but-2-enylamino) purine (glucosyl zeatin) and 9-β-d-ribofuranosyl-6 (4-0-β-d-gluc
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7. Revised identification of the chromophore of a cell division factor from crown gall tumor cells of Vinca rosea L
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8. Revised Methods for Purification of Ribosyl-trans-zeatin from Vinca rosea L. Crown Gall Tumor Tissue 1
Ribosyl-trans-zeatin has been purified from Vinca rosea L. crown gall tumor tissue by using two new sequences of isolation procedures. Identification of the compound has been established by mass spectrometry, ultraviolet absorbancy spectra, chromatographic values, and growth activity. The isolation sequences eliminate the exposures to pH extremes and the str
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9. The structural characterization of endogenous factors from Vinca rosea crown gall tumors that promote cell division of tobacco cells.
The ability of two compounds, a cytokinin and an auxin, to stimulate tobacco cell growth and differentiation has been known for greater than 30 years, but the molecular mechanism of this activation is still unknown. Previous reports of factors endogenous in crown gall tumors of Vinca rosea that could replace the cytokinin requirement in tobacco cell culture
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10. Cytokinins in Vinca rosea L. Crown Gall Tumor Tissue as Influenced by Compounds Containing Reduced Nitrogen 1
Several compounds containing reduced nitrogen markedly increased the yields of cell-division compounds extractable from an A6 Vinca rosea L. crown gall tumor tissue. Casein hydrolysate, several amino acids, and ammonium salts were effective. Both trans-zeatin and ribosyl-trans-zeatin were substantially increased in total amount per culture and in concentrati
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11. A Transformation-induced Alteration of Cellular Membranes in Crown Gall Tumor Cells 1
Phospholipids were utilized as a membrane marker to test for transformation-induced alteration of cellular membranes of cultured crown gall cells of Vinca rosea L. Fully transformed cells contained less than half the amount of phospholipids (7.8 micrograms lipid P per gram fresh weight) of normal V. rosea cells (21.4 micrograms lipid P per gram fresh weight)
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12. Revised Identification of the Chromophore of a Cell Division Factor from Crown Gall Tumor Cells of Vinca rosea L*
Low-resolution mass spectrometry, UV spectra in acid, neutral, and alkaline solution, and nuclear magnetic resonance indicated that the chromophore of one member of a new class of cell division-promoting factors isolated from crown gall tumor tissues consisted of a 3,7-alkyl-2-alkylthio-6-purinone with one free proton in the ring. Glucose constitutes the sug