Selective phytotoxic activity of withanolides from Iochroma australe to crop and weed species

Citation
Ce. Vaccarini et Gm. Bonetto, Selective phytotoxic activity of withanolides from Iochroma australe to crop and weed species, J CHEM ECOL, 26(9), 2000, pp. 2187-2196
Citations number
15
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Environment/Ecology
Journal title
JOURNAL OF CHEMICAL ECOLOGY
ISSN journal
0098-0331 → ACNP
Volume
26
Issue
9
Year of publication
2000
Pages
2187 - 2196
Database
ISI
SICI code
0098-0331(200009)26:9<2187:SPAOWF>2.0.ZU;2-L
Abstract
Phytotoxic effects of lochroma australe extract and 4,7,20-oxowithanolides were examined in Petri dish bioassays at 10, 100, and 1000 ppm. The extract and the major constituent (17S,20R,22R)-4 beta ,7 beta ,20 alpha -trihydro xy-1-oxowitha-2,5,24-trienolide (2) reduced growth of the radicle of the we eds Sorghum halepense (Monoct.) and Chenopodium album (Dicot.). Neither the extract nor withanolides had significant effect on germination or radicle length of the commercial crop species Lactuca sativa. From our experimental data we conclude that the withanolides tested here are natural products wi th selective herbicidal activity against weed species.