By Jeffrey B. Harborne, Renee J. Grayer (auth.), J. B. Harborne (eds.)
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Extra resources for The Flavonoids: Advances in Research since 1980
Because of their ready metab olism in viv a, anthocyanins have usually been thought of as being dietarily beneficial in human s (Pierpoint, 1986) and toxicological effects have rarely been considered in any animals. Yet, Hedin and his co-work ers (1983) have observed that the cotton leaf anthocyanin, cyanidin 3-glucoside, is particularly inhibitory to larval growth in the tobacco budworm H elioth is viriscens. It is even more inhibitory to this moth than the well-kn own cotton toxin, gossypol. Since anthoc yanin is present in the leaf of many cotton cultivars, it could be a factor in limiting insect predation on this crop.
1983), Z. Naturforsch. 38c, 342. Scogin, R. (1985), B iochem. Sys t . Eeol. 13,387. S. Y. (1980), Hanguk Sikp'um Kwahakhoe Chi 12,305. SmalI, CJ. C. (1982), Planta 154, 97. L. W. J. (1981), J. N at. Prod. ( Ll oy dia ) 44, 609. Sommer, H . and Saedler, H. (1986), Mol. Gen. Genet , 202, 429. Stirton, J,Z . and Harborne, J,B . (1980), Bioehem. Syst, Eeol. 8, 285. , Akavia, N . and Reznik, H . (1980), Z. Naturforsch . 35c,533. , Grotjahn, L. and Klein , E. (1986), Z. Naturforsch . 41c, 707. Sulyok, G.
Freudenberg and Purrman reported entepicatechin from the latter source in 1923, but this oecurrence was later suggested to be an artefact of the nonenzymic epimerization of eatechin, now disproved. Entcatechin has only very recently been isolated from Rhaphiolepsis umbellata and Polygonum multiflorum (as the 7glucoside and 3-gallate respectively). , 1983). ) have been confined to the Leguminosae and Anacardiaceae. , 1981). Two new hydroxyflavan-ß-ols were reported in 1983. Prosopin (so named, Roux, 1986) was isolated from Prosopis glandulosa (mesquite) and shown to have (2R, 3S) absolute stereochemistry by CD correlation with catechin (Roux, 1986).
The Flavonoids: Advances in Research since 1980 by Jeffrey B. Harborne, Renee J. Grayer (auth.), J. B. Harborne (eds.)