Distinct protocerebral neuropils associated with attractive and aversive female-produced odorants in the male moth brain

Author:

Kymre Jonas Hansen1,Liu XiaoLan23,Ian Elena1,Berge Christoffer Nerland1,Wang GuiRong3,Berg Bente Gunnveig1,Zhao XinCheng2ORCID,Chu Xi1ORCID

Affiliation:

1. Chemosensory lab, Department of Psychology, Norwegian University of Science and Technology, Trondheim, Norway

2. Department of Entomology, College of Plant Protection, Henan Agricultural University, Zhengzhou, China

3. State Key Laboratory for Biology of Plant Disease and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China

Abstract

The pheromone system of heliothine moths is an optimal model for studying principles underlying higher-order olfactory processing. In Helicoverpa armigera, three male-specific glomeruli receive input about three female-produced signals, the primary pheromone component, serving as an attractant, and two minor constituents, serving a dual function, that is, attraction versus inhibition of attraction. From the antennal-lobe glomeruli, the information is conveyed to higher olfactory centers, including the lateral protocerebrum, via three main paths – of which the medial tract is the most prominent. In this study, we traced physiologically identified medial-tract projection neurons from each of the three male-specific glomeruli with the aim of mapping their terminal branches in the lateral protocerebrum. Our data suggest that the neurons’ widespread projections are organized according to behavioral significance, including a spatial separation of signals representing attraction versus inhibition – however, with a unique capacity of switching behavioral consequence based on the amount of the minor components.

Funder

Norges Forskningsråd

National Natural Science Foundation of China

The Education Department of Henan Province

Publisher

eLife Sciences Publications, Ltd

Subject

General Immunology and Microbiology,General Biochemistry, Genetics and Molecular Biology,General Medicine,General Neuroscience

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