Carotenogenesis in Phycomyces

Time course studies of carotenoid production and of mycelial growth in liquid cultures of Phycomyces blakesleeanus wild type [NRRL 1555 (?)], red mutants C9, C10 and C13 and the heterokaryon C2 * C9 are reported. The ratios of the concentrations of lycopene, γ-carotene and β-carotene in the red mutant C13 and in the heterokaryon C2 * C9 during the growth periods were measured. In these strains the concentration of lycopene is close to its final value after 2 days of growth, at a time at which β-carotene is just beginning to be produced. It is suggested that the β-carotene produced late is possibly synthesized via β-zeacarotene.     

Indol-3yl-acetic acid in roots of Zea mays

Indol-3yl-acetic acid was identified in extracts of sterile roots of Zeamays seedlings by means of TLC, chromogenic reactions, GLC and GC-MS.     

Alcoxyhalogenation d'acides gras ethyleniques. IV: Cas des octadécadienoates de méthyle 9c, 12c et 9t, 11t et de composés apparentés

Methoxybromination, with HBBT, of long chain methylene interrupted dienes led to simultaneous formation of methoxybromides and dimethoxydibromides. Formation of dimethoxydibromides in which methoxy groups are both internal is limited by steric hindrance.Methoxybromination of long chain conjugated dienes forms, in nearly equal quantities, methoxybromides resulting from a 1,4 addition and methoxybromides from 1,2 addition in which the methoxy group is adjacent to the double bond.     

Volatiles from the epicuticular wax of watercress (Rorippa nasturtium-aquaticum)

Volatiles from the epicuticular wax of watercress were collected by ether washing and examined using gas chromatographic and mass spectrometric analysi     

A chemosystematic study of some geraniaceae

The flavonoids of five Geranium, fourteen Erodium and four Monsonia species were studied. Quercetin was the most common aglycone with lesse     

Alkaloids of the leaves of Voacanga grandifolia

Besides vobtusine and vobtusine-lactone, deoxyvobtusine was isolated from the leaves of Voacanga grandifolia (Miq. Rolfe. Spectral and chemical evi     

Biflavones of Dioon

Seven biflavones, amentoflavone, bilobetin, sequoiaflavone, ginkgetin, sciadopitysin, 7,4′,7′,4?-tetra-O-methylamentoflavone, and diooflavone (amentoflavone hexamethyl ether), were identified from extracts of the cycad genus Dioon. The biflavones were identified by direct comparison with authentic samples using m.m.p., co-chromatography in 3 solvents, and NMR studies of the acetates. This is the first time amentoflavone hexamethyl ether has been identified as a natural product. After surveying numerous species of the Cycadales, no evidence could be obtained for the occurrence of biflavone glycosides or of biflavones based upon any other nucleus than apigenin.     

Effect of oleocellosis,desiccation, and fungal infection upon the terpenes of individual oil glands in Citrus latipes

Mono- and sesqui-terpenes of individual oil glands of Citrus latipes fruits were analyzed for their homogeneity. The effect of oleocellosis, desiccation, Penicillium and Phytophthora infection upon the individual terpene components was investigated and expressed in a discriminant analysis and in canonical variables. Each oil gland contained the entire spectrum of terpenes specific for each species, and the biggest difference in affected glands was due to Penicillium infection.