Biological activity of enantiomerically pure forms of insect juvenile hormone I and III inBombyx mori |
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| Authors: | S Sakurai T Ohtaki H Mori M Fujiwhara K Mori |
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| Institution: | (1) Department of Biology, Faculty of Science, Kanazawa University, 920 Kanazawa, (Japan);(2) Department of Agricultural Chemistry, Faculty of Agriculture, The University of Tokyo, Bunkyo-ku, 113 Tokyo, (Japan) |
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| Abstract: | Summary Biological activity of enantiomerically pure juvenile hormones was assayed by topical application on allatectomizedBombyx fourth instar larvae. JHs tested were (10R)-JH I methyl (2E,6E,10R,11S)-10,11-epoxy-3,11-dimethyl-7-ethyl-2,6-tridecadienoate], (10S)-JH I methyl (2E, 6E, 10S, 11R)-10,11-epoxy-3,11-dimethyl-7-ethyl-2,6-tridecadienoate], (10R)-JH III methyl (2E,6E,10R)-10,11-epoxy-3,7,11-trimethyl-2,6-dodecadienoate] and (10S)-JH III methyl (2E,6E,10S)-10,11-epoxy-3,7,11-trimethyl-2,6-dodecadienoate]. Among these compounds, natural (10R)-JH I was most active and the dose needed to induce 50% larval molting was 0.04  g/larva; it was approximately 12,000 times more active than unnatural (10S)-JH I. Though natural (10R)-JH III showed slight biological activity, it was only one three-thousandth of that of (10R)-JH I. Unnatural (10S)-JH III exhibited no biological activity at the levels assayed. |
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| Keywords: | Juvenile hormone enantiomer biological activity Bombyx mori allatectomy |
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