Current models state that insect peripheral oscillators are directly responsive to light, while mammalian peripheral clock genes are coordinated by a master clock in the brain via intermediate factors, possibly hormonal. We show that the expression levels of two circadian clock genes, period (per) and Par Domain Protein 1 (Pdp1) in the peripheral tissue of an insect model species, the linden bug Pyrrhocoris apterus, are inversely affected by contrasting photoperiods. The effect of photoperiod on per and Pdp1 mRNA levels was found to be mediated by the corpus allatum, an endocrine gland producing juvenile hormone. Our results provide the first experimental evidence for the effect of an endocrine gland on circadian clock gene expression in insects.

Institute of Entomology Biological Center ASCR vvi Branisovska 31 Ceske Budejovice Czech Republic

Citace poskytuje Crossref.org

Impact of photoperiod and functional clock on male diapause in cryptochrome and pdf mutants in the linden bug Pyrrhocoris apterus

Steroid receptor coactivator TAIMAN is a new modulator of insect circadian clock

Functional analysis and localisation of a thyrotropin-releasing hormone-type neuropeptide (EFLa) in hemipteran insects

Daily Activity of the Housefly, Musca domestica, Is Influenced by Temperature Independent of 3' UTR period Gene Splicing

Autonomous regulation of the insect gut by circadian genes acting downstream of juvenile hormone signaling

Nature's Timepiece-Molecular Coordination of Metabolism and Its Impact on Aging

Common and distinct roles of juvenile hormone signaling genes in metamorphosis of holometabolous and hemimetabolous insects