Background. To cope with their natural enemies, plants rely on resistance and tolerance as defensive strategies. Evolution of these strategies among natural population can be constrained by the absence of genetic variation or because of the antagonistic genetic correlation (trade-off) between them. Also, since plant defenses are integrated by several traits, it has been suggested that trade-off...

For the determination of the hyoscyamine-scopolamine content in small quantities of fresh plant tissue an HPLC assay was developed; with a sensitivity of about 20 ng alkaloid per run. Analysis of the different organs of Datura innoxia plants are in accord with the concept that hyoscyamine is synthesized in the roots, whereas transformation to scopolamine starts in these organs and proceeds in t...

Medicinal plants in the world are natural antioxidant sources as they contain some secondary metabolites such phenolic acids and flavonoids. Therefore, used to prevent or treat many diseases parts of world. However, use antioxidants cancer treatment is still controversial. Accordingly, composition potential ethanol extracts Momordica charantia L. (Cucurbitaceae) Datura stramonium (Solanaceae), ...

Plants contain various secondary metabolites such as saponin, steroids, flavonoids, and alkaloids, which have shown antioxidant activity that includes scavenging free radical species, inhibiting the production of reactive species, inhibiting the production of reactive species resulting from normal cell metabolism. The present study was undertaken to analyse the antioxidant activity of various e...