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Titolo:
Retinal and extraretinal pathways for entrainment of the circadian activity rhythm in the blow fly, Protophormia terraenovae
Autore:
Hamasaka, Y; Watari, Y; Arai, T; Numata, H; Shiga, S;
Indirizzi:
Osaka City Univ, Grad Sch Sci, Dept Bio & Geosci, Osaka 5588585, Japan Osaka City Univ Osaka Japan 5588585 t Bio & Geosci, Osaka 5588585, Japan Ashiya Univ, Fac Educ, Biotechnol Lab, Ashiya 6598511, Japan Ashiya Univ Ashiya Japan 6598511 , Biotechnol Lab, Ashiya 6598511, Japan
Titolo Testata:
JOURNAL OF INSECT PHYSIOLOGY
fascicolo: 8, volume: 47, anno: 2001,
pagine: 867 - 875
SICI:
0022-1910(20010715)47:8<867:RAEPFE>2.0.ZU;2-X
Fonte:
ISI
Lingua:
ENG
Soggetto:
LOCOMOTOR-ACTIVITY-RHYTHMS; LEGGED GROUND CRICKET; DROSOPHILA-MELANOGASTER; OPTIC LOBES; PHOTOPERIODIC REGULATION; DIAPAUSE; INDUCTION; PHOTORECEPTOR; REMOVAL; NIGROFASCIATUS;
Keywords:
Protophormia terraenovae; compound eyes; circadian rhythm; extraretinal photoreceptors;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
29
Recensione:
Indirizzi per estratti:
Indirizzo: Shiga, S Osaka City Univ, Grad Sch Sci, Dept Bio & Geosci, Osaka 5588585, Japan Osaka City Univ Osaka Japan 5588585 eosci, Osaka 5588585, Japan
Citazione:
Y. Hamasaka et al., "Retinal and extraretinal pathways for entrainment of the circadian activity rhythm in the blow fly, Protophormia terraenovae", J INSECT PH, 47(8), 2001, pp. 867-875

Abstract

The role of the compound eyes in entrainment of the circadian activity rhythm was examined in Protophormia terraenovae (Diptera: Calliphoridae). In intact females, the freerunning period of the rhythm under constant darknesswas about 25.0 h. The rhythm entrained to light-dark (LD) cycles with activity restricted to the photophase. When the compound eyes were completely covered with silver paint and black synthetic resin paint, the rhythm freeran under LD cycles with the photophase of intensities 1.4x10(-3) as well as 1.4 W/m(2). Control flies showed complete entrainment. When the compound eyes and ocelli were surgically removed, the rhythm freeran under 1.4x10-3 W/m2 LD cycles but entrained to 1.4 W/m2 LD cycles. Flies subjected to a shamoperation, in which the ocelli were removed, showed complete entrainment To LD cycles. When the compound eyes were removed and then the operated region was covered with the paint, some flies showed entrainment while others showed freerunning rhythm under 1.4 W/m2 LD cycles. The results show that P.terraenovae uses both extraretinal and retinal pathways for rhythm entrainment, and that the extraretinal receptors receive light passing principallythrough the compound eyes. It appears that entrainment is mediated primarily by signals from the retinal receptors at low light intensities. (C) 2001Elsevier Science Ltd. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 08/04/20 alle ore 09:07:55