| Title: | Lipid droplets in the pheromone glands of bombycids: Effects of larval diet on their size and pheromone titer |
| Author(s): | Fujii T; Kodama S; Ishikawa Y; Yamamoto M; Sakurai T; Fonagy A; |
| Address: | "Faculty of Agriculture, Setsunan University, 45-1 Nagao-Togecho, Hirakata, Osaka 573-0101, Japan. Electronic address: takeshi.f0405@gmail.com. Faculty of Agriculture, Setsunan University, 45-1 Nagao-Togecho, Hirakata, Osaka 573-0101, Japan. Graduate School of Bio-Applications and Systems Engineering, Tokyo University of Agriculture and Technology, Koganei, Tokyo 184-8588, Japan. Faculty of Agriculture, Tokyo University of Agriculture, Atsugi, Kanagawa 243-0034, Japan. Zoology Department, Plant Protection Institute, Centre for Agricultural Research, Eotvos Lorand Research Network (formerly affiliated to the Hungarian Academy of Sciences), Budapest 1022, Hungary" |
| DOI: | 10.1016/j.jinsphys.2022.104440 |
| ISSN/ISBN: | 1879-1611 (Electronic) 0022-1910 (Linking) |
| Abstract: | "In addition to the blend ratio, the quantity of sex pheromone components secreted by female moths may affect the efficient attraction of conspecific males. The present study using the silkmoth Bombyx mori, which has bombykol as its pheromone component, demonstrated that pheromone titer, body weight, and lipid droplet (LD) diameter in the pheromone gland were affected by the larval diet. Although the artificial diet contained approximately 11-fold more total fatty acids than mulberry leaf, the pheromone titer in the group fed the artificial diet (group AD) was approximately 2-fold higher than that of the group fed mulberry (group M). The diameter of LDs, which store the pheromone-precursor fatty acyl, E10,Z12-16:Acyl, was also larger in the AD group. The relatively small increase in sex pheromone titer by feeding on a fatty-acid-rich diet may be partly attributable to the storage of excess precursors in the LDs. We detected LDs in the pheromone glands of Trilocha varians, the closest non-congener of B. mori available in Bombycidae. T. varians uses bombykal and bombykyl acetate as sex pheromone components, which are biosynthesized via the same precursor fatty acyl as that of B. mori. The presence of LDs in T. varians suggests that the storage and mobilization mechanisms of the pheromone precursor fatty acyl via LDs may be conserved in bombycids" |
| Keywords: | Animals *Bombyx/metabolism Diet Fatty Acids/metabolism Female Larva Lipid Droplets Male *Moths Pheromones/metabolism *Sex Attractants/metabolism Bombycidae Lipid droplet Lipid metabolism Long chain fatty acid Sex pheromone titer; |
| Notes: | "MedlineFujii, Takeshi Kodama, Sayo Ishikawa, Yukio Yamamoto, Masanobu Sakurai, Takeshi Fonagy, Adrien eng Research Support, Non-U.S. Gov't England 2022/09/10 J Insect Physiol. 2022 Oct; 142:104440. doi: 10.1016/j.jinsphys.2022.104440. Epub 2022 Sep 7" |
