Circadian locomotor rhythms in the cricket, Gryllodes sigillatus. II. Interactions between bilaterally paired circadian pacemakers

Zoological Science
H UshirogawaK Tomioka

Abstract

The optic lobe is essential for circadian locomotor rhythms in the cricket, Gryllodes sigillatus. We examined potential interactions between the bilaterally paired optic lobes in circadian rhythm generation. When one optic lobe was removed, the free-running period of the locomotor rhythm slightly but significantly lengthened. When exposed to light-dark cycles (LD) with 26 hr period, intact and sham operated animals were clearly entrained to the light cycle, but a large number of animals receiving unilateral optic nerve severance showed rhythm dissociation. In the dissociation, two rhythmic components appeared; one was readily entrained to the given LD and the other free-ran with a period shorter than 24 hr, and activity was expressed only when they were inphase. The period of the free-running component was significantly longer than that of the animals with a single blinded pacemaker kept in LD13:13, suggesting that the pacemaker on the intact side had some influence on the blinded pacemaker even in the dissociated state. The ratio of animals with rhythm dissociation was greater with the lower light intensity of the LD. The results suggest that the bilaterally distributed pacemakers are only weakly coupled to one another but str...Continue Reading

Citations

Jan 14, 2011·Cell and Tissue Research·Sandra SoehlerThomas Reischig
Aug 25, 2015·FEBS Letters·Esteban J Beckwith, M Fernanda Ceriani
Dec 7, 2007·Brain Research Reviews·Mariska J VansteenselJohanna H Meijer
Dec 17, 2014·The Journal of Comparative Neurology·Esteban J Beckwith, M Fernanda Ceriani
Dec 23, 2004·Zoological Science·Kenji Tomioka, Salaheldin Abdelsalam
Feb 5, 2014·Journal of Biological Rhythms·Hiroki TakekataSakiko Shiga
Jul 26, 2018·International Journal of Molecular Sciences·Leonor Mendoza-VargasHéctor Solís-Chagoyán

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