Olfactory coding in honeybees

Paoli, Marco; Galizia, C. Giovanni

doi:10.1007/s00441-020-03385-5

Cited by 58 publications

(50 citation statements)

References 299 publications

(370 reference statements)

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“…Yet uncovering these mechanisms in other insect species, in particular in those that bear economic importance or serve as models for other research areas, constitutes an important strategic goal. Such is the case of the honey bee ( Apis mellifera ), which has a fundamental environmental and socioeconomic importance given its crucial role as pollinator agent in agricultural landscapes and which has served as a traditional model for basic research on various sensory modalities (e.g., visual [Avarguès‐Weber et al., 2011; Avarguès‐Weber et al., 2012] olfactory [Paoli & Galizia, 2021; Sandoz, 2011], mechanosensory [Giurfa & Malun, 2004; Scheiner et al., 2005]). In the last decade, massive colony losses have been reported worldwide and described as the “colony collapse disorder” (Oldroyd, 2007; VanEngelsdorp et al., 2009).…”

Section: Introductionmentioning

confidence: 99%

Peripheral taste detection in honey bees: What do taste receptors respond to?

Bestea

Réjaud

Sandoz

et al. 2021

Eur J of Neuroscience

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Understanding the neural principles governing taste perception in species that bear economic importance or serve as research models for other sensory modalities constitutes a strategic goal. Such is the case of the honey bee (Apis mellifera), which is environmentally and socioeconomically important, given its crucial role as pollinator agent in agricultural landscapes and which has served as a traditional model for visual and olfactory neurosciences and for research on communication, navigation, and learning and memory. Here we review the current knowledge on honey bee gustatory receptors to provide an integrative view of peripheral taste detection in this insect, highlighting specificities and commonalities with other insect species. We describe behavioral and electrophysiological responses to several tastant categories and relate these responses, whenever possible, to known molecular receptor mechanisms.Overall, we adopted an evolutionary and comparative perspective to understand the neural principles of honey bee taste and define key questions that should be answered in future gustatory research centered on this insect.

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Section: Introductionmentioning

confidence: 99%

Peripheral taste detection in honey bees: What do taste receptors respond to?

Bestea

Réjaud

Sandoz

et al. 2021

Eur J of Neuroscience

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“…Glomeruli are interlinked by local neurons and their stereotyped activation patterns encode odor identity and concentration ( Galizia et al, 1999b ). The glomerular output neurons, called projection neurons (PN) and corresponding to the mitral and tufted cells in vertebrates, send these signals to higher-order brain centers like the mushroom bodies (MBs) and the lateral horns (LHs) ( Paoli and Galizia, 2021 ).…”

Section: Introductionmentioning

confidence: 99%

Parallel Processing of Olfactory and Mechanosensory Information in the Honey Bee Antennal Lobe

et al. 2021

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In insects, neuronal responses to clean air have so far been reported only episodically in moths. Here we present results obtained by fast two-photon calcium imaging in the honey bee Apis mellifera, indicating a substantial involvement of the antennal lobe, the first olfactory neuropil, in the processing of mechanical stimuli. Clean air pulses generate a complex pattern of glomerular activation that provides a code for stimulus intensity and dynamics with a similar level of stereotypy as observed for the olfactory code. Overlapping the air pulses with odor stimuli reveals a superposition of mechanosensory and odor response codes with high contrast. On the mechanosensitive signal, modulations were observed in the same frequency regime as the oscillatory motion of the antennae, suggesting a possible way to detect odorless airflow directions. The transduction of mechanosensory information via the insect antennae has so far been attributed primarily to Johnston’s organ in the pedicel of the antenna. The possibility that the antennal lobe activation by clean air originates from Johnston’s organ could be ruled out, as the signal is suppressed by covering the surfaces of the otherwise freely moving and bending antennae, which should leave Johnston’s organ unaffected. The tuning curves of individual glomeruli indicate increased sensitivity at low-frequency mechanical oscillations as produced by the abdominal motion in waggle dance communication, suggesting a further potential function of this mechanosensory code. The discovery that the olfactory system can sense both odors and mechanical stimuli has recently been made also in mammals. The results presented here give hope that studies on insects can make a fundamental contribution to the cross-taxa understanding of this dual function, as only a few thousand neurons are involved in their brains, all of which are accessible by in vivo optical imaging.

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“…Insects depend on olfactory chemoreception for locating reproductive partners, food sources, and oviposition sites, and also for avoiding predators [ 1 ]. As a consequence, insects have evolved a highly sensitive and sophisticated olfactory system in order to deal with their ever-changing chemical environment [ 2 , 3 , 4 ]. In peri-receptor events, odorant molecules pass through the aqueous sensillum lymph before reaching the dendrites of olfactory receptor neurons.…”

Section: Introductionmentioning

confidence: 99%

GOBP1 from the Variegated Cutworm Peridroma saucia (Hübner) (Lepidoptera: Noctuidae) Displays High Binding Affinities to the Behavioral Attractant (Z)-3-Hexenyl acetate

Sun

Dong

Song

et al. 2021

Insects

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The variegated cutworm Peridroma saucia (Hübner) is a worldwide pest that causes serious damage to many crops. To recognize sex pheromones and host plant volatiles, insects depend on olfactory chemoreception involving general odorant-binding proteins (GOBPs). In this study, PsauGOBP1 was cloned from the adult antennae of P. saucia. RT-qPCR and Western-blot analysis showed that PsauGOBP1 was specifically and equally expressed in the adult antennae of both females and males. Fluorescence competitive-binding assays with sex pheromones and host plant volatiles demonstrated that PsauGOBP1 bound to six host plant volatiles: (Z)-3-hexenyl acetate (KD 4.0 0.1 μM), citral (KD 5.6 0.4 μM), farnesol (KD 6.4 0.6 μM), nonanal (KD 6.8 0.3 μM), (Z)-3-hexen-1-ol (KD 8.5 0.6 μM), and benzaldehyde (KD 9.4 0.5 μM). Electroantennogram recordings with the six host plant volatiles indicated that (Z)-3-hexenyl acetate elicited the strongest responses from both male and female antennae. Further bioassays using Y-tube olfactometers showed that (Z)-3-hexenyl acetate was attractive to adult P. saucia of both sexes. These results suggest that PsauGOBP1 might be involved in detecting host plant volatiles and that (Z)-3-hexenyl acetate might serve as a potential attractant for the biological control of P. saucia.

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Olfactory coding in honeybees

Cited by 58 publications

References 299 publications

Peripheral taste detection in honey bees: What do taste receptors respond to?

Peripheral taste detection in honey bees: What do taste receptors respond to?

Parallel Processing of Olfactory and Mechanosensory Information in the Honey Bee Antennal Lobe

GOBP1 from the Variegated Cutworm Peridroma saucia (Hübner) (Lepidoptera: Noctuidae) Displays High Binding Affinities to the Behavioral Attractant (Z)-3-Hexenyl acetate

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