Fine Structure and Olfactory Reception of the Labial Palps of Spodoptera frugiperda

The olfactory system of insects is essential in many crucial behaviors, such as host seeking, mate recognition, and locating oviposition sites. Lepidopteran moths possess two main olfactory organs, including antennae and labial palps. Compared to antennae, the labial palps are relatively specific an...

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Autores principales: Chen, Qiuyan, Liu, Xiaolan, Cao, Song, Ma, Baiwei, Guo, Mengbo, Shen, Jie, Wang, Guirong
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8369160/
https://www.ncbi.nlm.nih.gov/pubmed/34413785
http://dx.doi.org/10.3389/fphys.2021.680697
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author Chen, Qiuyan
Liu, Xiaolan
Cao, Song
Ma, Baiwei
Guo, Mengbo
Shen, Jie
Wang, Guirong
author_facet Chen, Qiuyan
Liu, Xiaolan
Cao, Song
Ma, Baiwei
Guo, Mengbo
Shen, Jie
Wang, Guirong
author_sort Chen, Qiuyan
collection PubMed
description The olfactory system of insects is essential in many crucial behaviors, such as host seeking, mate recognition, and locating oviposition sites. Lepidopteran moths possess two main olfactory organs, including antennae and labial palps. Compared to antennae, the labial palps are relatively specific and worthy of further investigation due to the labial-palp pit organ (LPO), which contains a large number of sensilla located on the tip segment. The fall armyworm, Spodoptera frugiperda, is a worldwide lepidopteran pest, which can damage more than 350 plants and cause significant economic losses. In this study, we surveyed the structure of the labial palps and LPO of S. frugiperda using a super-high magnification lens zoom 3D microscope. Then, the distribution and fine structure of sensilla located in the LPO of S. frugiperda were investigated using scanning electron microscopy. Subsequently, the electrophysiological responses of labial palps to CO(2) and 29 plant volatiles were recorded by using electrolabialpalpography. Our results showed the fine structure of labial palps, the LPO, and the sensilla located in the LPO of S. frugiperda. Moreover, we demonstrated that the labial palps are olfactory organs that respond to both CO(2) and other volatile compounds. Our work established a foundation for further study of the roles of labial palps in insect olfactory related behaviors. Further investigations on the function of labial palps and their biological roles together with CO(2) and volatile compound responses in S. frugiperda are necessary, as they may provide better insect behavioral regulators for controlling this pest.
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spelling pubmed-83691602021-08-18 Fine Structure and Olfactory Reception of the Labial Palps of Spodoptera frugiperda Chen, Qiuyan Liu, Xiaolan Cao, Song Ma, Baiwei Guo, Mengbo Shen, Jie Wang, Guirong Front Physiol Physiology The olfactory system of insects is essential in many crucial behaviors, such as host seeking, mate recognition, and locating oviposition sites. Lepidopteran moths possess two main olfactory organs, including antennae and labial palps. Compared to antennae, the labial palps are relatively specific and worthy of further investigation due to the labial-palp pit organ (LPO), which contains a large number of sensilla located on the tip segment. The fall armyworm, Spodoptera frugiperda, is a worldwide lepidopteran pest, which can damage more than 350 plants and cause significant economic losses. In this study, we surveyed the structure of the labial palps and LPO of S. frugiperda using a super-high magnification lens zoom 3D microscope. Then, the distribution and fine structure of sensilla located in the LPO of S. frugiperda were investigated using scanning electron microscopy. Subsequently, the electrophysiological responses of labial palps to CO(2) and 29 plant volatiles were recorded by using electrolabialpalpography. Our results showed the fine structure of labial palps, the LPO, and the sensilla located in the LPO of S. frugiperda. Moreover, we demonstrated that the labial palps are olfactory organs that respond to both CO(2) and other volatile compounds. Our work established a foundation for further study of the roles of labial palps in insect olfactory related behaviors. Further investigations on the function of labial palps and their biological roles together with CO(2) and volatile compound responses in S. frugiperda are necessary, as they may provide better insect behavioral regulators for controlling this pest. Frontiers Media S.A. 2021-08-03 /pmc/articles/PMC8369160/ /pubmed/34413785 http://dx.doi.org/10.3389/fphys.2021.680697 Text en Copyright © 2021 Chen, Liu, Cao, Ma, Guo, Shen and Wang. https://creativecommons.org/licenses/by/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
spellingShingle Physiology
Chen, Qiuyan
Liu, Xiaolan
Cao, Song
Ma, Baiwei
Guo, Mengbo
Shen, Jie
Wang, Guirong
Fine Structure and Olfactory Reception of the Labial Palps of Spodoptera frugiperda
title Fine Structure and Olfactory Reception of the Labial Palps of Spodoptera frugiperda
title_full Fine Structure and Olfactory Reception of the Labial Palps of Spodoptera frugiperda
title_fullStr Fine Structure and Olfactory Reception of the Labial Palps of Spodoptera frugiperda
title_full_unstemmed Fine Structure and Olfactory Reception of the Labial Palps of Spodoptera frugiperda
title_short Fine Structure and Olfactory Reception of the Labial Palps of Spodoptera frugiperda
title_sort fine structure and olfactory reception of the labial palps of spodoptera frugiperda
topic Physiology
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8369160/
https://www.ncbi.nlm.nih.gov/pubmed/34413785
http://dx.doi.org/10.3389/fphys.2021.680697
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