Distribution in the plant of glycoresins and ergoline alkaloids in three species of Ipomoea (Convolvulaceae)

An analysis for glycoresins and ergoline alkaloids was carried out on 3 species of the ''Jalapa root'' complex: Ipomoea purga Choisy, D.C., I. orizabensis (Pelletan) Ledenois and I. jalapa (L.) Pursh. The chromatographic profiles of roots, stems, leaves and seeds were determined and compared. Glycoresins were found in all plant parts, in greater amounts in the roots. Ergoline alkaloids were detected. in small amounts in some organs. Glycoresins were found in the 3 species, I. purga showing the larger number of spot

Ecdysteroids and other secondary metabolites from Amaranthus indica Mill (Amaranthaceae)

A general screening for secondary metabolites was carried out with the methanolic extract from the leaves and stems of Amaranthus indica Mill (Amaranthaceae). Three ecdysteroids: amasterol. ecdysterone, pterosterone, one sesquiterpene lactone, iresin, and an isoflavone, tlatlancuayin were isolated

Comparative histological and histochemical study of the Jalapa root

A comparative histological and histochemical study was carried out in samples of ''Jalapa root'' complex which includes three species of lpomoea, I. purga (Wenderoth) Hayne, I. orizabensis (Pelletan) Steud, and I. jalapa (L) Pursh. Stains with PAS, Red Oil, Naphthol Blue Black and IKI, were performed with samples of roots of this complex. The main histological differences between the three species were found in the cork, in the form, distribution and abundance of the laticifers. The size, number and distribution of the xylem, phloem and fibers, also were important characteristics of each species as well as the presence of brachysclereids and the abundance of druses. The special stains helped to identify some cells or cell structures

influence of uv light on flavonoid profiles of two maize lines with different response to armyworm (spodoptera frugiperda) attack

Two maize genotypes with different response to Spodoptera frugiperda attack, were grown in the field under two different light regimes: covered or not with UV-absorbent plastic, and under infestation conditions or not. Chromatographic profiles of flavonoids were run and a bioassay was carried out in order to determine the effect on the insect diet of two concentrations of the leaf methanolic extract. Differences occurred in the number and location of the spots in the flavonoid profiles of the two lines and also in the response of larvae to the leaf methanolic extract containing diet

Taxonomic markers of the family Convolvulaceae in four species of Cuscuta

Chromatographic profiles of ergoline alkaloids, glycoresins and kauranoic glucosides, considered as taxonomic markers of the Convolvulaceae, were determined in Cuscuta americana L., C. arvensis Beyrich, C. corymbosa Ruiz y Pavon var. stylosa Engelm. & C. tinctoria Mart. In the 4 species markers of the three groups of compounds mere found. These results support the idea of considering Cuscuta as a genus of the family Convolvulaceae and not as a family by itself

Xanthones, flavones and coumarins from Amarantus paniculatus Schinz (Amarantaceae)

A general screening for secondary metabolites was carried out with the methanolic extract from the leaves and stems of Amarantus paniculatus Schinz (Amarantaceae). Two coumarins: umbelliferone 1 and scopoletin 2, one chromone derivative, piliostigmin 3 (2-phenoxychromone) and three flavonoids: 6,8-di-C-methylquercetin-3-methyl ether 4, eucalyptin 5 and gnaphaliin 6 were isolated

Seasonal influence on the biosynthesis of ergoline alkaloids in the genus Cuscuta (Convolvulaceae)

Stems of Cuscuta americana L., C. arvensis Beyr., C. corymbosa R. & P. var. stylosa Engelm. and C. tinctoria Mart. were analyzed to elucidate the influence that seasonal changes may have an the synthesis of ergoline alkaloids, glycoresins and karuanoic glucosides. From samples of the four species, collected in the rainy season as well as in the dry season, the chromatographic profiles of the 3 groups of compounds were determined, using as references standard markers. The ergoline alkaloids were found only during the rainy season in all samples, whereas the glycoresins and the kauranoic glucosides are produced during both seasons and with a different distribution pattern far each species

Oil composition and flavonoid profiles of the seeds of three Annona species

The fatty acid composition and the triglycerides from the seed oil of Annona diversifolia Safford, A. purpurea Moc. et Sesse ex Dunal and A. lutescens Safford were determined. Also a chromatographic analysis of the seed flavonoids was carried out. The fatty acid and triglyceride profiles showed a closer relationship between A. purpurea and A. lutenscens than between these two species and A. diversifolia. The number of spots and their distribution in the flavonoid chromatograms showed a similar relationship. The chromatographic analysis of the seed flavonoids shows similar relationships among the species with respect to the number of components and their distribution