Bioactive saponins from Microsechium helleri and Sicyos bulbosus.
Phytochemistry
; 72(8): 743-51, 2011 Jun.
Article
en En
| MEDLINE
| ID: mdl-21439597
Eleven oleanane-type saponins (1-11) have been isolated from Microsechium helleri and Sicyos bulbosus roots and were evaluated for their antifeedant, nematicidal and phytotoxic activities. Saponins {3-O-ß-D-glucopyranosyl (1â3)-ß-D-glucopyranosyl-2ß,3ß,16α,23-tetrahydroxyolean-12-en-28-oic acid 28-O-α-L-rhamnopyranosyl-(1â3)-ß-D-xylopyranosyl-(1â4)-[ß-D-xylopyranosyl-(1â3)]-α-L-rhamnopyranosyl-(1â2)-α-L-arabinopyranoside} (1), and {3-O-ß-D-glucopyranosyl-2ß,3ß,16α,23-tetrahydroxyolean-12-en-28-oic acid 28-O-α-L-rhamnopyranosyl-(1â3)-ß-D-xylopyranosyl-(1â4)-[ß-D-xylopyranosyl-(1â3)]-α-L-rhamnopyranosyl-(1â2)-α-L-arabinopyranoside} (2) were also isolated from M. helleri roots together with the two known compounds 3 and 4. Seven known structurally related saponins (5-11) were isolated from S. bulbosus roots. The structures of these compounds were established as bayogenin and polygalacic glycosides using one- and two-dimensional NMR spectroscopy and mass spectrometry. Compounds 7, 10, bayogenin (12) and polygalacic acid (13) showed significant (p<0.05) postingestive effects on Spodoptera littoralis larvae, compounds 5-11 and 12 showed variable nematicidal effects on Meloydogyne javanica and all tested saponins had variable phytotoxic effects on several plant species (Lycopersicum esculentum, Lolium perenne and Lactuca sativa). These are promising results in the search for natural pesticides from the Cucurbitaceae family.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Ácido Oleanólico
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Saponinas
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Spodoptera
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Cucurbitaceae
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Citotoxinas
/
Antinematodos
Límite:
Animals
Idioma:
En
Revista:
Phytochemistry
Año:
2011
Tipo del documento:
Article
País de afiliación:
México
Pais de publicación:
Reino Unido