Phase Shifts of the Circadian Locomotor Rhythm Induced by Pigment-Dispersing Factor in the Cricket Gryllus bimaculatus

Singaravel, Muniyandi; Fujisawa, Yuko; Hisada, Miki; Saifullah, Asm; Tomioka, Kenji

doi:10.2108/zsj.20.1347

Cited by 41 publications

(37 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These results indicate that the main role of PDF is to coordinate and synchronize the oscillations of the other clock neurons in the absence of external time cues. A similar role of PDF was also suggested for larger insects (Petri and Stengl 2001;Singaravel et al 2003;Schneider and Stengl 2005).…”

Section: The Neuropeptide Pdf As Internal Synchronizersupporting

confidence: 69%

The Lateral and Dorsal Neurons ofDrosophila melanogaster:New Insights about Their Morphology and Function

Helfrich‐Förster

Yoshii

Wülbeck

et al. 2007

Cold Spring Harbor Symposia on Quantitative Biology

View full text Add to dashboard Cite

This chapter summarizes our present knowledge about the master clock of the fruit fly at the neuronal level. The clock is organized in distinct groups of interconnected pacemaker neurons with different functions. All of these neurons appear to communicate with one another in order to produce the species-specific activity rhythm, which is organized in morning (M) and evening (E) activity bouts. These two activity components are differentially influenced by distinct groups of pacemaker neurons reminiscent of the Pittendrigh-Daan dual oscillator model. In the original work (Grima et al. 2004;Stoleru et al. 2004), the ventrolateral (LN v ) and dorsolateral (LN d ) plus some dorsal groups (DN) of clock neurons have been defined as M and E cells, respectively. We further specify that the clock neurons belong to the M and E oscillators and define a more complex picture of the Drosophila brain clock.

show abstract

Section: The Neuropeptide Pdf As Internal Synchronizersupporting

confidence: 69%

The Lateral and Dorsal Neurons ofDrosophila melanogaster:New Insights about Their Morphology and Function

Helfrich‐Förster

Yoshii

Wülbeck

et al. 2007

Cold Spring Harbor Symposia on Quantitative Biology

View full text Add to dashboard Cite

show abstract

“…In Drosophila, PDF is expressed in so-called ventral lateral neurons (LNvs), putative clock neurons (HelfrichFörster, 1995), and pdf 0 mutant flies lacking PDF show aberrant rhythm in constant darkness (Renn et al, 1999). In crickets and cockroaches, PDF has phase-shifting effects on the circadian clock (Petri and Stengl, 1997;Singaravel et al, 2003). PDF-immunoreactive neurons are thought to be the likely candidate of clock neurons in cockroaches, as has been mentioned.…”

Section: Output Pathway Of the Circadian Clockmentioning

confidence: 93%

Circadian Organization in Hemimetabolous Insects

Tomioka

Abdelsalam

2004

Zoological Science

Self Cite

View full text Add to dashboard Cite

ABSTRACT-The circadian system of hemimetabolous insects is reviewed in respect to the locus of the circadian clock and multioscillatory organization. Because of relatively easy access to the nervous system, the neuronal organization of the clock system in hemimetabolous insects has been studied, yielding identification of the compound eye as the major photoreceptor for entrainment and the optic lobe for the circadian clock locus. The clock site within the optic lobe is inconsistent among reported species; in cockroaches the lobula was previously thought to be a most likely clock locus but accessory medulla is recently stressed to be a clock center, while more distal part of the optic lobe including the lamina and the outer medulla area for the cricket. Identification of the clock cells needs further critical studies. Although each optic lobe clock seems functionally identical, in respect to photic entrainment and generation of the rhythm, the bilaterally paired clocks form a functional unit. They interact to produce a stable time structure within individual insects by exchanging photic and temporal information through neural pathways, in which serotonin and pigment-dispersing factor (PDF) are involved as chemical messengers. The mutual interaction also plays an important role in seasonal adaptation of the rhythm.

show abstract

“…Injection of PDH shifted the onset of the locomotor rhythm in L. maderae (Petri and Stengl, 1997). In the cricket Gryllus bimaculatus, PDF injection caused phase shifts of the locomotor rhythm in a phase-dependent manner (Singaravel et al, 2003). Using RNA interference (RNAi) techniques, it was shown that knockdown of pdf gene expression disrupted the circadian locomotor rhythm of the German cockroach, Blattella germanica (Lee et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

The involvement of the brain region containing pigment-dispersing factor-immunoreactive neurons in the photoperiodic response of the bean bugRiptortus pedestris

Ikeno

Numata

Goto

et al. 2013

Journal of Experimental Biology

View full text Add to dashboard Cite

The concept of insect photoperiodism based on a circadian clock has been supported by many studies demonstrating that the behavioural circadian rhythm and the photoperiodic response are driven by the same circadian clock genes. However, the neuronal mechanism of the circadian clock underlying photoperiodism is poorly understood. To examine whether circadian rhythm and photoperiodism share a neuronal mechanism, we focused on the neurons that express neuropeptide pigment-dispersing factor (PDF) in the bean bug, Riptortus pedestris. PDF has been identified as an important regulator of the insect circadian rhythm and is expressed in circadian clock neurons of various insect species. In R. pedestris, PDF immunoreactivity was detected in some clusters of cells and their fibres in the optic lobe and the protocerebrum. cDNA encoding a PDF precursor protein was highly conserved between R. pedestris and many other insects. Differences between day and night were not observed in the immunolabelling intensity in cell bodies of PDFimmunoreactive neurons and pdf mRNA expression levels in the head. Surgical removal of the region containing PDF-immunoreactive cell bodies at the medulla disrupted the photoperiodic regulation of diapause. However, gene suppression of pdf by RNA interference did not affect the photoperiodic response. These results suggest that the region containing PDF-immunoreactive somata is important for the photoperiodic response in R. pedestris, but pdf mRNA expression is probably not required for the response.

show abstract

Phase Shifts of the Circadian Locomotor Rhythm Induced by Pigment-Dispersing Factor in the Cricket Gryllus bimaculatus

Cited by 41 publications

References 29 publications

The Lateral and Dorsal Neurons ofDrosophila melanogaster:New Insights about Their Morphology and Function

The Lateral and Dorsal Neurons ofDrosophila melanogaster:New Insights about Their Morphology and Function

Circadian Organization in Hemimetabolous Insects

The involvement of the brain region containing pigment-dispersing factor-immunoreactive neurons in the photoperiodic response of the bean bugRiptortus pedestris

Contact Info

Product

Resources

About