Chemical Identification and Ethological Function of Soldier-Specific Secretion in Japanese Subterranean Termite Reticulitermes speratus (Rhinotermitidae)
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概要
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We identified the soldier-specific compounds in the Japanese subterranean termite, Reticulitermes speratus, to clarify their ethological roles. Silica gel column chromatography separated one major soldier-specific compound in the hexane fraction accounting for 70–80% of the total amount of the fraction, while cuticular hydrocarbons constituted the rest. We identified the compound as β-selinene by gas chromatography-mass spectrometry (GC-MS) and nuclear magnetic resonance (NMR) spectroscopy. Comparative GC analyses of the major exocrine glands detected the compound in the soldier’s frontal gland. Both soldiers and workers made aggregation to the hexane fraction, as well as to the crushed heads and head extract of the soldiers. They did not aggregate to cuticular hydrocarbons, making it likely that β-selinene was the aggregation pheromone in this species. The opportunistic predator of this termite, Lasius japonicus, was also attracted to the compounds. The ant workers, therefore, would use the termite aggregation pheromone as a kairomone for hunting them.
著者
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Kanaori Kenji
Department Of Applied Biology Kyoto Institute Of Technology
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YAMAOKA Ryohei
Chemical Ecology Laboratory, Graduate School of Science and Technology, Kyoto Institute of Technolog
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Akino Toshiharu
Chemical Ecology Lab. Kyoto Inst. Of Technol.
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NGUYEN Tuan
Chemical Ecology Laboratory, Kyoto Institute of Technology
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HOJO Masaru
Chemical Ecology Laboratory, Kyoto Institute of Technology
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KAWADA Tatsuro
Chemical Ecology Laboratory, Kyoto Institute of Technology
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