| Title: | N-(18-hydroxylinolenoyl)-L-glutamine: a newly discovered analog of volicitin in Manduca sexta and its elicitor activity in plants |
| Author(s): | Yoshinaga N; Ishikawa C; Seidl-Adams I; Bosak E; Aboshi T; Tumlinson JH; Mori N; |
| Address: | "Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Sakyo, Kyoto, 606-8502, Japan, yoshinaga.naoko.5v@kyoto-u.ac.jp" |
| DOI: | 10.1007/s10886-014-0436-y |
| ISSN/ISBN: | 1573-1561 (Electronic) 0098-0331 (Linking) |
| Abstract: | "Plants attacked by insect herbivores release a blend of volatile organic compounds (VOCs) that serve as chemical cues for host location by parasitic wasps, natural enemies of the herbivores. Volicitin, N-(17-hydroxylinolenoyl)-L-glutamine, is one of the most active VOC elicitors found in herbivore regurgitants. Our previous study revealed that hydroxylation on the 17th position of the linolenic acid moiety of N-linolenoyl-L-glutamine increases by more than three times the elicitor activity in corn plants. Here, we identified N-(18-hydroxylinolenoyl)-L-glutamine (18OH-volicitin) from larval gut contents of tobacco hornworm (THW), Manduca sexta. Eggplant and tobacco, two solanaceous host plants of THW larvae, and corn, a non-host plant, responded differently to this new elicitor. Eggplant and tobacco seedlings emitted twice the amount of VOCs when 18OH-volicitin was applied to damaged leaf surfaces compared to N-linolenoyl-L-glutamine, while both these fatty acid amino acid conjugates (FACs) elicited a similar response in corn seedlings. In both solanaceous plants, there was no significant difference in the elicitor activity of 17OH- and 18OH-volicitin. Interestingly, other lepidopteran species that have 17OH-type volicitin also attack solanaceous plants. These data suggest that plants have developed herbivory-detection systems customized to their herbivorous enemies" |
| Keywords: | Animals Glutamine/*analogs & derivatives/chemistry/metabolism *Herbivory Linolenic Acids/chemistry/*metabolism Manduca/chemistry/*physiology *Plant Physiological Phenomena Plants/chemistry Seedlings/physiology Solanum melongena/physiology Tobacco/physiolo; |
| Notes: | "MedlineYoshinaga, Naoko Ishikawa, Chihiro Seidl-Adams, Irmgard Bosak, Elizabeth Aboshi, Takako Tumlinson, James H Mori, Naoki eng Research Support, Non-U.S. Gov't 2014/05/13 J Chem Ecol. 2014 May; 40(5):484-90. doi: 10.1007/s10886-014-0436-y. Epub 2014 May 11" |
