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 strong cation-exchange resin used in the...

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 concentration. These two compounds have been ide...

The sulfates of VLB1 and VCR, alkaloids derived from Vinca rosea (9, 11), the flowering periwinkle plant, have been found useful in the treatment of malignant disease (1, 2, 5, 8). Despite their great similarity in chemical structure (Chart 1), these 2 drugs differ in antitumor spectrum, potency, and toxicity and appear to lack cross-resistance between one another (6, 10). With these difference...

Progesterone was converted to 5alpha-pregnane-3alpha-ol-20-one, delta4-pregnene-20alpha-ol-3-one, delta4-pregnene-14alpha-ol-3,20-dione, delta4-pregnene-7beta,14alpha-diol-3,20-dione, and delta4-pregnene-6beta,11alpha-diol-3,20-dione by cell cultures of Lycopersicon esculentum. Cell cultures of Capsicum frutescens (green) metabolized progesterone to delta4-pregnene-20alpha-ol-3-one in very high...

The present investigation was carried out to study the induced mutagenesis of EMS (Ethyl methane sulphonate) on the seed germination, seedling survival and LD50 value of Catharanthus roseus. The seeds of Vinca rosea were treated with different concentration of EMS viz., 5, 10, 15, 20, 25, 30, 35, 40, 45 and 50 mM. The untreated seeds were taken as control. The EMS treated and control seeds were...

Proteksi terhadap infeksi seperti pandemik virus dapat dihasilkan dengan meningkatkan imunitas tubuh. Tanaman obat yang diolah dan digunakan baik mampu berpotensi tersebut. Penelitian ini bertujuan untuk mengetahui aktivitas hemaglutinasi karakteristik ekstrak berbasis natural deep eutectic solvents (NADES) atau lebih dikenal istilah green solvent dari akar Tapak Dara (Vinca rosea) daun Kadamba...