Dose- and time-dependent effects of oral octopamine treatments on the sucrose responsiveness in stingless bees (Melipona scutellaris)

Cabe, Sofía I. Mc; Ferro, Marco W. Benetoli; Farina, Walter M.; Hrncir, Michael

doi:10.1007/s13592-016-0442-x

Cited by 16 publications

(19 citation statements)

References 44 publications

(56 reference statements)

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“…Only for octopamine are some data available. In M. scutellaris octopamine increases gustatory responsiveness similar to honeybees [McCabe et al, 2017]. In another stingless bee, Plebeia droryana, octopamine treatment increases the number of bees at artificial sucrose feeders, which was interpreted by an octopaminedriven lowering of the individual sucrose response threshold [Peng et al, 2020], similar to the effect observed in honeybees [Barron et al, 2002;Barron and Robinson, 2005].…”

Section: Discussionmentioning

confidence: 72%

Tyramine 1 Receptor Distribution in the Brain of Corbiculate Bees Points to a Conserved Function

et al. 2021

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Sucrose represents an important carbohydrate source for most bee species. In the Western honeybee (<i>Apis mellifera</i>) it was shown that individual sucrose responsiveness correlates with the task performed in the colony, supporting the response threshold theory which states that individuals with the lowest threshold for a task-associated stimuli will perform the associated task. Tyramine was shown to modulate sucrose responsiveness, most likely via the tyramine 1 receptor. This receptor is located in brain areas important for the processing of gustatory stimuli. We asked whether the spatial expression pattern of the tyramine 1 receptor is a unique adaptation of honeybees or if its expression represents a conserved trait. Using a specific tyramine receptor 1 antibody, we compared the spatial expression of this receptor in the brain of different corbiculate bee species, including eusocial honeybees, bumblebees, stingless bees, and the solitary bee <i>Osmia bicornis</i> as an outgroup. We found a similar labeling pattern in the mushroom bodies, the central complex, the dorsal lobe, and the gnathal ganglia, indicating a conserved receptor expression. With respect to sucrose responsiveness this result is of special importance. We assume that the tyramine 1 receptor expression in these neuropiles provides the basis for modulation of sucrose responsiveness. Furthermore, the tyramine 1 receptor expression seems to be independent of size, as labeling is similar in bee species that differ greatly in their body size. However, the situation in the optic lobes appears to be different. Here, the lobula of stingless bees is clearly labeled by the tyramine receptor 1 antibody, whereas this labeling is absent in other species. This indicates that the regulation of this receptor is different in the optic lobes, while its function in this neuropile remains unclear.

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Section: Discussionmentioning

confidence: 72%

Tyramine 1 Receptor Distribution in the Brain of Corbiculate Bees Points to a Conserved Function

et al. 2021

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“…This raises the question whether OA plays similar roles in stingless bees as in honeybees. We are aware of only one study that has explored the effects of OA in stingless bees: Mc Cabe et al [21] found that in the stingless bee Melipona scutellaris, workers treated with OA showed an increased sucrose responsiveness, similar to what has been found in A. mellifera [21,22]. They found both timeand dose-dependent effects of OA on sucrose responsiveness.…”

Section: Introductionmentioning

confidence: 73%

“…At the treatment feeder, we added 0.01 M OA (Sigma Adrich), whereas the control feeder did not offer OA (Colonies that were offered an OA feeder during the treatment phase will be called OA colonies, whereas colonies offered only sucrose solution will be called control colonies). This OA concentration effectively lowered the sucrose response threshold in M. scutellaris [21] and recruitment communication in honeybees [11]. The treatment period lasted 60 min, during which all marked and unmarked bees at the feeders were counted at 5 min intervals.…”

Section: Methodsmentioning

confidence: 99%

Octopamine increases individual and collective foraging in a neotropical stingless bee

2020

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The biogenic amine octopamine (OA) is a key modulator of individual and social behaviours in honeybees, but its role in the other group of highly eusocial bees, the stingless bees, remains largely unknown. In honeybees, OA mediates reward perception and affects a wide range of reward-seeking behaviours. Thus, we tested the hypothesis that OA increases individual foraging effort and collective food source exploitation in the neotropical stingless bee Plebeia droryana . OA treatment caused a significant increase in the number of bees at artificial sucrose feeders and a 1.73-times higher individual foraging frequency. This effect can be explained by OA lowering the sucrose response threshold and, thus, increasing the perceived value of the food source. Our results demonstrate that, similar to its effects on honeybees, OA increases both individual and collective food source exploitation in P. droryana . This suggests that, despite having evolved many complex behaviours independently, OA might have similar regulatory effects on foraging behaviours in the two groups of highly eusocial bees.

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“…Expression of a gene encoding the octopamine receptor (Amoctβr3/4) changes with age rather than with social task, whereas that of Amoctαr1 correlates with social tasks (Reim and Scheiner, 2014). Octopamine can also enhance sugar responses in the proboscis extension of the honey bee (Scheiner et al, 2002) and the stingless bee Melipona scutellaris (McCabe et al, 2017), which is a behavioral modulation for foraging characteristics. In fact, octopamine increases individual foraging effort and collective food source exploitation in the neotropical stingless bee Plebeia droryana (Peng et al, 2020).…”

Section: From Nursing To Foragingmentioning

confidence: 99%

Social Evolution With Decoupling of Multiple Roles of Biogenic Amines Into Different Phenotypes in Hymenoptera

et al. 2021

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Convergent evolution of eusociality with the division of reproduction and its plastic transition in Hymenoptera has long attracted the attention of researchers. To explain the evolutionary scenario of the reproductive division of labor, several hypotheses had been proposed. Among these, we focus on the most basic concepts, i.e., the ovarian ground plan hypothesis (OGPH) and the split-function hypothesis (SFH). The OGPH assumes the physiological decoupling of ovarian cycles and behavior into reproductive and non-reproductive individuals, whereas the SFH assumes that the ancestral reproductive function of juvenile hormone (JH) became split into a dual function. Here, we review recent progress in the understanding of the neurohormonal regulation of reproduction and social behavior in eusocial hymenopterans, with an emphasis on biogenic amines. Biogenic amines are key substances involved in the switching of reproductive physiology and modulation of social behaviors. Dopamine has a pivotal role in the formation of reproductive skew irrespective of the social system, whereas octopamine and serotonin contribute largely to non-reproductive social behaviors. These decoupling roles of biogenic amines are seen in the life cycle of a single female in a solitary species, supporting OGPH. JH promotes reproduction with dopamine function in primitively eusocial species, whereas it regulates non-reproductive social behaviors with octopamine function in advanced eusocial species. The signal transduction networks between JH and the biogenic amines have been rewired in advanced eusocial species, which could regulate reproduction in response to various social stimuli independently of JH action.

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Dose- and time-dependent effects of oral octopamine treatments on the sucrose responsiveness in stingless bees (Melipona scutellaris)

Cited by 16 publications

References 44 publications

Tyramine 1 Receptor Distribution in the Brain of Corbiculate Bees Points to a Conserved Function

Tyramine 1 Receptor Distribution in the Brain of Corbiculate Bees Points to a Conserved Function

Octopamine increases individual and collective foraging in a neotropical stingless bee

Social Evolution With Decoupling of Multiple Roles of Biogenic Amines Into Different Phenotypes in Hymenoptera

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