1. Chloroplasts prepared by the non-aqueous technique will, after fragmentation by ultrasonic treatment, incorporate [2-14C]mevalonic acid into phytoene, the first C40 compound formed in the biosynthetic sequence to coloured carotenoids. 2. With suspensions containing 3*5mg. of chlorophyll, the optimum amounts of cofactor required were ATP (10,umoles), magnesium chloride (20,umoles) and glutath...

This study aims to determine nutritional as well as medicinal properties of Moringa oleifera (Drumstick) and Cicer arietinum (Chick pea) leaves. The possible health benefits of these underutilized leafy vegetables were explored by determining total phenolic content by Folin-Ciocalteau reagent, free radical-scavenging activity by 2, 2diphenyl-1-picrylhydrazyl and phytochemicals extracted with ac...

Bacteriochlorophyll b (bchl b) has been isolated from the halophilic photosynthetic bacterium, Ectothiorhodospira halochloris. The pigment and a series of derivatives thereof are different from Bchl b from Rhodopseudomonas viriais by HPLC analysis, but similar by uv-vis spectroscopy. The chromatographic difference originates in different esterifying alcohols in the two pigments. The one from Rp...

Dimethazone is a bleaching herbicide without any peroxidative activity. In addition to the inhibition of chlorophylls, carotenes, and xanthophylls, decreased formation of other prenyl lipids (phytol and a-tocopherol) can be observed in the presence of dimethazone. Application of this herbicide to pea plants results in the inhibition of longitudinal growth of the newly formed internodes which ca...

The chemical composition of volatile oils from 22 genotypes of Citrus and related genera was poorly differentiated, but chemometric techniques have clarified the relationships between the 22 genotypes, and allowed us to understand their resistance to D. citri. The most convincing similarities include the synthesis of (Z)-β-ocimene and (E)-caryophyllene for all 11 genotypes of group A. Genotypes...

The search for novel drugs from higher plants led to the analysis of a novel plant source Rhynchosia capitata for its phytoconstituents. GC/MS study confirm the presence of oleic acid, octadecanoic acid, phytol, hexadecanoic acid, E-11-hexadecenoic acid, Z,Z,Z-4,6,9-nonadecatriene, tetradecanoic acid, 5-azulenemethanol and1-butanol. A highly sensitive reverse phase high performance liquid chrom...

Although the enzyme chlorophyllase has been long known (13) only recently has evidence been presented for its probable function in chlorophyll a (chl a) biogenesis, namely, the demonstration that methyl chlorophyllide a (me chlide a) was transesterified with phytol in the presence of chlorophyllase yielding chl a (2). However, no evidence has been presented that wouild indicate the presence of ...