Please use this identifier to cite or link to this item:
DC FieldValueLanguage
dc.contributor.authorGonzález, A. G.en_US
dc.contributor.authorBarrera, J. B.en_US
dc.contributor.authorToledo Marante, F. J.en_US
dc.contributor.authorCastellano, A. G.en_US
dc.description.abstractFifteen biogenetically-re!ated phenolic substances were obtained from the lichen Evernia prunastri: orsellinic acid, evemuuc acid, methyl everninate, ethyl eveminate, methyl di-0-methylorsellinate, evemic acíd, methyl 2'-0-methyl lecanorate, methyl 􀃨-orsellinate, methyl hematomate, ethyl hematomate, evernin, atranorin, 2,2'--di-O-methylgyrophoric aoid, prunastrin, and (+)-usnic acid. Seven were found for the first time in this species and three (methyl 2'-0-methyl lecanorate, 2,2'-di-O-methylgyrophoric acid and prunastrin) have never been reported before. New physicochemical data were recorded for all compounds. Chemical/HPLC chromatographic correlation detected the two monocyclic fragments of evemic acid, the unstable orsellinic and everninic acids in the acetone extract of the lichen. A mixture of ali the phenolic substances from E. Prunastri, k.noV1on as "Evernal", was applied to cabbage, green pepper and tomate seedlings, at both steady and allernant (nighUday) temperatures and it was observed that although some seeds were more resistant than others, a 2.0% concentration of the phenolic fraction totally inhibited seed germination at 20 'C, while germination with less than 2% concentrations produced a sickly crop which withered after a few days. LD50 (in % w/w evemal) were 0.31 for cabbage, 0.37 for tomato and 1.80 for peppers. Sharp, regular drops in temperature increased the allelopathi􀏉 activen_US
dc.publisherKluwer Academic Publishersen_US
dc.relationFEDER 1FD 1997- 1 831en_US
dc.relationPI2001/144 (Gobierno de Canarias)en_US
dc.sourceNatural products in the new millennium: prospects and industrial application, Proceedings of the Phytochemical Society of Europe, 49/A.P. Rauter ... [et al.], cap 2: Bioactivity of natural products. Ethnobotany, p. 195-210en_US
dc.subject230690 Química de productos naturales orgánicosen_US
dc.titleThe chemistry and allelopathic effects of phenolic compounds from the Lichen Evernia prunastri (L.) Ach.en_US
dc.type2Capítulo de libroen_US
item.fulltextSin texto completo-
item.grantfulltextnone- Marante, Francisco Javier-
Appears in Collections:Capítulo de libro
Show simple item record

Google ScholarTM




Export metadata

Items in accedaCRIS are protected by copyright, with all rights reserved, unless otherwise indicated.