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Antifeedant and phytotoxic activity of cacalolides and eremophilanolides.
- Source :
-
Zeitschrift fur Naturforschung. C, Journal of biosciences [Z Naturforsch C J Biosci] 2007 May-Jun; Vol. 62 (5-6), pp. 362-6. - Publication Year :
- 2007
-
Abstract
- The antifeedant effect of six cacalolides and six eremophilanolides was tested against the herbivorous insects Spodoptera littoralis, Leptinotarsa decemlineata, and Myzus persicae. The test compounds included several natural products isolated from Senecio madagascariensis (14-isovaleryloxy-1,2-dehydrocacalol methyl ether, 4), S. barba-johannis (13-hydroxy-14-oxocacalohastine, 5; 13-acetyloxy-14-oxocacalohastine, 6) and S. toluccanus [6-hydroxyeuryopsin, 7; 1(10)-epoxy-6-hydroxyeuryopsin, 9; toluccanolide A, 11] and the derivatives cacalol methyl ether (1); cacalol acetate (2); 1-acetyloxy-2-methyloxy-1,2,3,4-tetradehydrocacalol acetate (3); 6-acetyloxyeuryopsin (8); 6-acetyloxy-1(10)-epoxyeuryopsin (10), and toluccanolide A acetate (12). Compound 11 and its derivative 12 exhibited moderate antifeedant activity against S. littoralis; 2, 7-10, and 12 showed strong activity against L. decemlineata, while the aphid M. persicae was moderately deterred in the presence of compounds 1, 4, 8, 10, and 12. The phytotoxic activity of 1-12 on Lactuca sativa was also evaluated. Compounds 2 and 4-12 moderately inhibited seed germination at 24 h, while compounds 1-4, 6, 9, and 10 had a significant inhibition effect on L. sativa radicle length (over 50%).
- Subjects :
- Animals
Antifungal Agents isolation & purification
Antifungal Agents pharmacology
Feeding Behavior drug effects
Insecticides isolation & purification
Insecticides toxicity
Models, Molecular
Plant Extracts isolation & purification
Plant Extracts pharmacology
Seeds chemistry
Antifungal Agents chemistry
Aphids drug effects
Coleoptera drug effects
Insecticides chemistry
Plant Extracts chemistry
Sesquiterpenes isolation & purification
Sesquiterpenes pharmacology
Spodoptera drug effects
Subjects
Details
- Language :
- English
- ISSN :
- 0939-5075
- Volume :
- 62
- Issue :
- 5-6
- Database :
- MEDLINE
- Journal :
- Zeitschrift fur Naturforschung. C, Journal of biosciences
- Publication Type :
- Academic Journal
- Accession number :
- 17708441
- Full Text :
- https://doi.org/10.1515/znc-2007-5-608