title: Differences in the phototaxis of pollen and nectar foraging honey bees are related to their octopamine brain titers.
abstract: The biogenic amine octopamine is an important neuromodulator, neurohormone and neurotransmitter in insects. We here investigate the role of octopamine signaling in honey bee phototaxis. Our results show that groups of bees differ naturally in their phototaxis. Pollen forgers display a lower light responsiveness than nectar foragers. The lower phototaxis of pollen foragers coincides with higher octopamine titers in the optic lobes but is independent of octopamine receptor gene expression. Increasing octopamine brain titers reduces responsiveness to light, while tyramine application enhances phototaxis. These findings suggest an involvement of octopamine signaling in honey bee phototaxis and possibly division of labor, which is hypothesized to be based on individual differences in sensory responsiveness.
authors.affiliation: Department of Biochemistry and Biology, University of Potsdam Potsdam, Germany.
authors.forename: Ricarda
authors.initials: R
authors.lastname: Scheiner
authors.affiliation: Department of Biochemistry and Biology, University of Potsdam Potsdam, Germany.
authors.forename: Anna
authors.initials: A
authors.lastname: Toteva
authors.affiliation: Department of Biochemistry and Biology, University of Potsdam Potsdam, Germany.
authors.forename: Tina
authors.initials: T
authors.lastname: Reim
authors.affiliation: Department of Biological Sciences, Macquarie University Sydney, NSW, Australia.
authors.forename: Eirik
authors.initials: E
authors.lastname: Søvik
authors.affiliation: Department of Biological Sciences, Macquarie University Sydney, NSW, Australia.
authors.forename: Andrew B
authors.initials: AB
authors.lastname: Barron
keywords: behavior; biogenic amines; division of labor; honey bee; insect; light responsiveness; tyramine
references.citation: J Comp Physiol A. 1999 Jul;185(1):1-10
references.pmid: 10450609
references.citation: J Neurochem. 2003 Aug;86(3):725-35
references.pmid: 12859685
references.citation: J Neurochem. 2014 Apr;129(2):284-96
references.pmid: 24266860
references.citation: PLoS One. 2011 Jan 18;6(1):e14536
references.pmid: 21267078
references.citation: J Comp Physiol A. 1998 Apr;182(4):489-500
references.pmid: 9565478
references.citation: Curr Neuropharmacol. 2006 Oct;4(4):259-76
references.pmid: 18654639
references.citation: Neurochem Res. 1993 Aug;18(8):921-5
references.pmid: 8371834
references.citation: J Insect Physiol. 2007 Feb;53(2):187-94
references.pmid: 17270208
references.citation: J Exp Biol. 2012 Apr 1;215(Pt 7):1076-83
references.pmid: 22399652
references.citation: Behav Brain Res. 2002 Nov 15;136(2):545-53
references.pmid: 12429417
references.citation: Prog Neurobiol. 1999 Dec;59(5):533-61
references.pmid: 10515667
references.citation: PLoS One. 2011;6(11):e26809
references.pmid: 22096499
references.citation: Prog Neurobiol. 2006 Sep;80(1):1-19
references.pmid: 17070981
references.citation: Neurobiol Learn Mem. 2001 Sep;76(2):138-50
references.pmid: 11502146
references.citation: J Insect Physiol. 2006 Oct;52(10):1083-92
references.pmid: 17028016
references.citation: Annu Rev Entomol. 1992;37:637-65
references.pmid: 1539941
references.citation: J Neurosci. 2005 Feb 9;25(6):1431-41
references.pmid: 15703397
references.citation: J Comp Physiol A. 2001 Feb;187(1):53-61
references.pmid: 11318378
references.citation: Learn Mem. 2005 Nov-Dec;12(6):626-35
references.pmid: 16322365
references.citation: Front Syst Neurosci. 2013 Oct 25;7:70
references.pmid: 24187534
references.citation: Behav Brain Res. 2006 Nov 1;174(1):174-80
references.pmid: 16934881
references.citation: J Neurosci. 1999 Oct 15;19(20):8799-807
references.pmid: 10516299
references.citation: Annu Rev Entomol. 2005;50:447-77
references.pmid: 15355245
references.citation: J Neurosci. 2003 Jun 15;23(12):5370-80
references.pmid: 12832563
references.citation: Behav Brain Res. 2009 Dec 14;205(1):132-7
references.pmid: 19643145
references.citation: J Neurochem. 2000 Mar;74(3):900-8
references.pmid: 10693920
references.citation: J Neurophysiol. 1995 Dec;74(6):2739-43
references.pmid: 8747228
references.citation: PLoS One. 2013 May 31;8(5):e64920
references.pmid: 23741423