Aminergic control and modulation of honeybee behaviour

Area of Science:

• Neuroethology
• Insect Neurobiology
• Molecular Signaling

Background:

• Biogenic amines are crucial signaling molecules in nervous systems.
• Honeybees (Apis mellifera) exhibit complex behaviors, making them ideal models for studying amine functions.
• Key amines in bees include dopamine, octopamine, serotonin, and tyramine, each with distinct roles.

Purpose of the Study:

• To review the current understanding of biogenic amine functions in honeybee behavior.
• To discuss the roles of specific amines (octopamine, tyramine, dopamine, serotonin) in modulating neuronal activity.
• To explore how biogenic amine receptors mediate cellular responses influencing learning and division of labor.

Main Methods:

• Review of existing literature on biogenic amines and their receptors in honeybees.
• Analysis of the known functions of dopamine, octopamine, serotonin, and tyramine.
• Discussion of G protein-coupled receptors and intracellular signaling pathways.

Main Results:

• Octopamine generally promotes arousal, enhances sensory input, improves learning, and increases foraging.
• Dopamine and serotonin often exert inhibitory or antagonistic effects compared to octopamine.
• Tyramine's role is less understood but may antagonize octopamine's effects.

Conclusions:

• Biogenic amines are vital for orchestrating diverse honeybee behaviors, including learning and social organization.
• Understanding biogenic amine receptor mechanisms is key to deciphering complex behaviors.
• The honeybee genome provides a foundation for identifying novel amine receptors and pathways.