Isovitexin

About: Isovitexin is a research topic. Over the lifetime, 526 publications have been published within this topic receiving 11525 citations. The topic is also known as: 6-Glucosylapigenin & Isovitexin.

C-glycosyl flavones and a comparative study of the antioxidant, hemolytic and toxic potential of Jatropha multifida leaves and bark

Abstract: The ethyl acetate extract from Jatropha multifida (Euphorbiaceae) leaves yielded two C-glycosyl flavones. Their structures were elucidated through spectroscopic methods, including UV, IR, 1D and 2D NMR, and compared with the related known compounds. The structures of the two flavonoids were determined as Vitexin ( 1 ) and Isovitexin ( 2 ). The ethanol extracts of leaves and bark and their fractions did not interfere in the integrity of erythrocytes, not even 1 and 2 . In the Brine shrimp lethality method, bark extracts showed greater toxic potential than the leaf extracts. Both flavonoids are not toxic. The Phosphomolybdenum and DPPH assays were used in order to investigate the antioxidant activity of both compounds and fractions of leaf and bark extracts. The ethyl acetate fraction of bark showed excellent activity, with IC 50 17.23 μg/mL -1 , equivalent to the standard values, Vitamin C and Rutin. Compounds 1 - 2 demonstrated good activity with IC 50 values of 54.37 and 87.27μg/mL -1 . In the Phosphomolybdenum test, the ethyl acetate fraction of bark showed 86.18% of antioxidant activity compared with Rutin, and the chloroform fraction of leaves, 103.29%. In all tests the bark extracts were more bioactive than the leaf extracts.

Effect of some Flavonoids and Phenolic Acids on Seed Germination and Rooting

Abstract: Effects of isovitexin (isolated from leaves of Rhynchosia minima), leucocyanidin, gallic acid, and protocatechuic acid on seed germination and subsequent seedling growth of a crucifer Brassica campestris, and two legumes Lens esculenta and R minima, as well as effects of isovitexin on rooting of onion bulbs are described Neither of the flavonoids affected seed germination in any of the three systems studied However, both the flavonoids promoted seedling growth in B campestris and L esculenta; the promotion of root growth was more marked At 10 −5 and 10 −7 M, isovitexin also promoted rooting of onion bulbs In the range of 227 × 10 −4 M to 328 × 10 −3 M, leucocyanidin promoted growth of both root and shoot in L esculenta, whereas in the range 328 × 10 −3 M to l64 × lO −3 M it suppressed seedling growth In contrast to the flavonoids, the two phenolic acids tested inhibited seed germination at 10 −3 M, and at lower concentrations they suppressed seedling growth The promotive effects of the flavonoids isovitexin and leucocyanidin, especially on root growth, hold promise for the use of such naturally occurring plant substances in studies on the physiology of plant growth and development

Phenolic constituents of Knautia arvensis aerial parts.

Abstract: A new C-6 flavone glycoside (6), together with seven known compounds, cryptochlorogenic acid (1), chlorogenic acid (2), 2-O-trans-caffeoylhydrocitric acid (3), isovitexin 7-β-D-glucopyranoside (4),...