| Title: | Differential signalling and plant-volatile biosynthesis |
| Address: | "Max Planck Institute of Chemical Ecology, Department of Bioorganics, Carl Zeiss Promenade 10, 07745 Jena, Germany. engelberth@ice.mpg.de" |
| ISSN/ISBN: | 0300-5127 (Print) 0300-5127 (Linking) |
| Abstract: | "At least two different signalling pathways have been identified that result in clearly distinguishable volatile profiles in response to pathogens and herbivores in the lima bean Phaseolus lunatus. Alamethicin, a voltage-gated ion-channel-forming peptide from Trichoderma viride, is a potent inducer of volatile biosynthesis in the lima bean. Unlike elicitation with cellulysin or herbivore damage, which act through the jasmonic acid pathway and result in a complex pattern of volatile compounds, the emitted blend comprises only the two homoterpens, 4,11-dimethylnona-1,3,7-triene and 4,8,12-trimethyltrideca-1,3,7,11-tetraene, and methyl salicylate. Both pathways, represented by jasmonic acid and alamethicin, depend on lipid-derived signalling compounds, set off by the activation of a phospholipase A and further processing by lipoxygenase activity. The alamethicin-induced signal-transduction pathway interferes with the octadecanoid cascade, probably due to increased salicylic acid levels, resulting in an inhibition of the typical jasmonic acid-induced volatile profile" |
| Keywords: | "Alamethicin/*pharmacology Fabaceae/drug effects/*physiology *Plants, Medicinal Salicylates/metabolism Signal Transduction/*physiology Terpenes/*metabolism;" |
| Notes: | "MedlineEngelberth, J eng England 2001/02/15 Biochem Soc Trans. 2000 Dec; 28(6):871-2" |
