Morphology and distribution of antennal sensilla of Automeris liberia (Lepidoptera: Saturniidae)

Silva, Kelly Barbosa da; Silva, Chryslane Barbosa da; Júnior, Karlos Antônio Lisboa Ribeiro; Freitas, Jeniffer Mclaine Duarte de; Freitas, Johnnatan Duarte de; Chia, Gilson Sanchez; Tinôco, Ricardo Salles; Costa, João Gomes da; Goulart, Henrique Fonseca; Santana, Antônio Euzébio Goulart

doi:10.1016/j.micron.2019.102682

Cited by 18 publications

(11 citation statements)

References 51 publications

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“…Finally, three sensilla conica were observed per antenna. Similar sensilla have been observed in the moth Automeris liberia (Cramer) (da Silva et al, 2019). Based on ultrastructural features and abundance, for these sensilla, a thermo‐hygroreceptive function can be proposed.…”

Section: Discussionsupporting

confidence: 78%

Antennal sensory organs and glands of the harlequin ladybird, Harmonia axyridis

Sevarika

Rondoni

Conti

et al. 2020

Entomologia Exp Applicata

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Harmonia axyridis (Pallas) (Coleoptera: Coccinellidae) is a sub-cosmopolitan species. Native to Asia, it has been released during the 20th century for classical and augmentative biological control of several herbivorous insects, mostly aphids and coccids. Despite its recognized positive impact on biological control, H. axyridis is now considered among the most dangerous invasive species in Europe and in most places where it has established. This is mostly due to its ability to reduce the populations of native predatory species of the same trophic guild. When exploring a new area, H. axyridis adults use semiochemical cues to acquire information about the habitat. Presumably, these cues are perceived by the sensilla located on the antennae. Surprisingly, in spite of the huge literature existing on H. axyridis, the antennal sensory organs have been poorly characterized. Here, we used scanning and transmission electron microscopy (SEM, TEM) techniques to study H. axyridis antennae, with focus on the various types of sensilla and their distribution in male and female individuals. The presence of various classes of antennal sensilla belonging to the main types described in insects (chemoreceptors, mechanoreceptors, and thermo-hygroreceptors) was highlighted, as well as the widespread presence of antennal glands. The investigations showed some peculiar characteristics not known in Coccinellidae, such as the concentration of sensory structures at the level of the distal part of the apical antennomere and the discovery of antennal glands associated with it. No sexual dimorphism was revealed, neither for the general structure of the antenna (similar number of antennomeres and presence of modifications), nor for the total length and width of the antenna, the relative size of the antennomeres, the types of antennal sensilla, of their distribution and abundance. The potential relevance of these sensory structures and antennal glands, reported for the first time in Coccinellidae, is discussed in the context of intra-and interspecific communication.

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Section: Discussionsupporting

confidence: 78%

Antennal sensory organs and glands of the harlequin ladybird, Harmonia axyridis

Sevarika

Rondoni

Conti

et al. 2020

Entomologia Exp Applicata

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“…A. lepigone possesses eight types of antennal sensilla. In accordance with the general model of other lepidopteran species, they are thought to be and mainly involved in mechanosensory, chemosensory (gustatory and olfactory), thermo‐hygroreceptive, and proprioceptive functions (Bawin et al, 2017; Chang et al, 2015; da Silva et al, 2019; Ma et al, 2017; Roh et al, 2018). The antennae are covered with dense scales, which might protect the sensilla from mechanical damage and volatile stimuli from odorant molecules of high concentration (Bawin et al, 2017).…”

Section: Discussionmentioning

confidence: 64%

“…Sensilla squamiformia were reported to have a mechanosensitive function, probably involved in the perception of air movements (Faucheux, 1999; Schneider, 1964; Shields, 2008). Sensilla chaetica were generally considered to be mechanoreceptor and/or contact chemosensilla (Chang et al, 2015; da Silva et al, 2019). Sensilla coeloconica likely function as both chemoreceptors and thermoreceptors, allowing odor substances penetrating the longitudinal grooved cuticular surface and sensing changes in temperature (Hunger & Steinbrecht, 1998; Steinbrecht, 1997).…”

Section: Discussionmentioning

confidence: 99%

“…Sensory structures are found on the antennae (da Silva et al, 2019; Roh et al, 2018; Schneider, 1964) and mouthparts of insects (Krenn, 2010), associated with various behaviors, such as host location, feeding, attracting a mate and identifying suitable oviposition sites (Zacharuk, 1980). The sensillum is the basic structural and functional unit of insect sensory systems (Chapman, 1998).…”

Section: Introductionmentioning

confidence: 99%

“…The derived proboscis possesses specialized structural modifications adapted to flower and nonflower‐visiting habits (Krenn, 2010; Lehnert et al, 2016; Molleman et al, 2005). Previous studies on antennal and proboscis sensilla of Lepidoptera focused on Pyralidae (Castrejón Gómez et al, 2003; Sun et al, 2011), Hesperiidae (Yuan et al, 2014), Saturniidae (da Silva et al, 2019), Gelechiidae (Bawin et al, 2017), Tortricidae (Roh et al, 2016, 2018; Walters et al, 1998), Nymphalidae (Krenn et al, 2001), Erebidae (Zaspel et al, 2011, 2013), Noctuidae (Castrejón‐Gómez et al, 1999; Chang et al, 2015; Chen et al, 2019; Seada, 2015; Xue et al, 2016; Xue & Hua, 2014; Zenker et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

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Sensilla of the antenna and proboscis of Athetis lepigone (Möschler) (Lepidoptera: Noctuidae)

Zhang

Wang

et al. 2021

Journal of Morphology

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Sensory structures on the antennae and mouthparts of insects are associated with various activities, such as host location, feeding, attracting a mate, and identifying a suitable oviposition site. Athetis lepigone (Möschler) is an important polyphagous Eurasian pest with more than 30 species of host plants. The larvae target bud leaves, prop roots, and tender stems of many agricultural crops, but the feeding habits of the adults remain poorly known. Aiming to understand the feeding behavior of the species, we investigated the fine morphology of its antennae and proboscis using scanning electron microscopy. The antennae of both sexes are filiform, and bear eight types of sensilla: Böhm's bristles, sensilla squamiformia, trichodea, chaetica, basiconica, coeloconica, styloconica, and auricillica. Sensilla trichodea are the most abundant among these sensillum types. The proboscis consists of two elongated, interlocked maxillary galeae that enclose the food canal by dorsal and ventral legulae. The external galeal surface is covered with numerous triangular microtrichia on Zone 1 and abundant blunt microbumps on Zone 2. The surface of the food canal bears closely connected and smooth semicircular ridges, gradually tapering toward the proboscis tip. Three types of sensilla are noticeable on the proboscis: sensilla trichodea, basiconica, and styloconica. We briefly discuss the putative functional significance of the antennal and proboscis sensilla and, based on the specific structural modifications of the proboscis, predict a flower‐visiting habit for A. lepigone.

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Crucial role of a takeout protein in white‐backed planthopper Sogatella furcifera (Horváth) orientation towards its host rice plants

He,

Long,

Feng

et al. 2024

Pest Management Science

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The takeout (TO) gene family impacts diverse physiological and behavioral functions in insects, yet specific olfactory‐associated roles for the family have yet to be fully elucidated. To provide insights into TO function in rice planthoppers, the genomes of three rice planthoppers (white‐backed planthopper, brown planthopper and small brown planthopper) were searched for TO homologs and their degree of conservation assessed via chromosomal localization, exon–intron boundaries, phylogenetic relationships and protein domains/motifs. We performed a tissue‐specific expression analysis of the 20 TO genes in the white‐backed planthopper (WBPH, Sogatella furcifera) and found that SfTO17 is enriched in adult antennae. RNAi‐mediated knockdown of SfTO17 impaired WBPH olfaction and reduced host‐seeking responses following exposure to rice plants. The binding profile of β‐ionone, hexyl benzoate and benzyl benzoate with recombinant SfTO17 was evaluated via competitive fluorescence binding assays. Conformational prediction of SfTO17 coupled with molecular docking analyses revealed several amino acid residues potentially critical for odorant binding. This study demonstrates the olfactory function of SfTO17 in WBPH and highlights its potential as a target for controlling this rice pest. © 2024 Society of Chemical Industry.

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Morphology and distribution of antennal sensilla of Automeris liberia (Lepidoptera: Saturniidae)

Cited by 18 publications

References 51 publications

Antennal sensory organs and glands of the harlequin ladybird, Harmonia axyridis

Antennal sensory organs and glands of the harlequin ladybird, Harmonia axyridis

Sensilla of the antenna and proboscis of Athetis lepigone (Möschler) (Lepidoptera: Noctuidae)

Crucial role of a takeout protein in white‐backed planthopper Sogatella furcifera (Horváth) orientation towards its host rice plants

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