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Insect Biochem Mol Biol

Title:		Reinvestigation of sex pheromone biosynthesis in the moth Trichoplusiani reveals novel quantitative control mechanisms
Author(s):		Foster SP;
Address:		"Entomology Department, School of Natural Resource Management, North Dakota State University, PO Box 6050, Fargo, ND, 58108-6050, USA. Electronic address: stephen.foster@ndsu.edu"
Journal Title:		Insect Biochem Mol Biol
Year:		2022
Volume:		20211129
Issue:
Page Number:		103700 -
DOI:		10.1016/j.ibmb.2021.103700
ISSN/ISBN:		1879-0240 (Electronic) 0965-1748 (Linking)
Abstract:		"Many species of moths have a common control mechanism for synthesizing sex pheromone: the circadian release of pheromone biosynthesis-activation neuropeptide (PBAN) that switches pheromone synthesis on/off during the day. One apparent exception to this is the noctuid moth Trichoplusia ni (Hubner), in which pheromone synthesis appears continuous through the photoperiod, with circadian release of PBAN controlling emission rate of pheromone during calling. Sex pheromone biosynthesis was reinvestigated in T. ni using stable isotope tracer-tracee and gland sampling techniques to ascertain how pheromone quantities in gland cells and on the gland cuticular surface varied and were controlled. It was found that (i) carbohydrate from adult female feeding is used to synthesize sex pheromone, (ii) most of the stored acetate ester pheromone component(s) is contained in gland cells, (iii) a large pool of pheromone is synthesized and stored through the photoperiod with a slow turnover rate, (iv) although pheromone is synthesized throughout the photoperiod, its rate can vary, influenced by release of PBAN and possibly by an unidentified head factor, with both affecting carbohydrate uptake into the acetyl CoA pheromone precursor pool, and (v) as suggested previously, PBAN also influences translocation of pheromone out of the cell to the cuticular surface, possibly by causing breakdown of intracellular lipid droplets storing pheromone molecules. This work suggests that the quantitative synthesis and emission of pheromone in T. ni, and possibly other moths, is regulated by multiple complementary biochemical mechanisms"
Keywords:		Animals Boronic Acids/metabolism Cyclopropanes/metabolism Moths/*metabolism Neuropeptides/metabolism Pheromones/*biosynthesis Photoperiod Secondary Metabolism Sex Attractants/biosynthesis Lepidoptera Mida Pban Pheromone translocation Stable isotopes Trace;
Notes:		"MedlineFoster, Stephen P eng Research Support, U.S. Gov't, Non-P.H.S. England 2021/12/03 Insect Biochem Mol Biol. 2022 Jan; 140:103700. doi: 10.1016/j.ibmb.2021.103700. Epub 2021 Nov 29"