National Repository of Grey Literature 13 records found  previous11 - 13  jump to record: Search took 0.01 seconds. 
Physiological mechanisms of aging in maless of model insect species
PROVAZNÍK, Jan
Trade-off between reproduction and longevity is a widely accepted fact, yet proximate mechanisms are scarcely understood. In this work I tested differences in lifespan between diapause and non-diapause males of a model insect, the linden bug Pyrrhocoris apterus. Also the role of juvenile hormone in regulation of longevity and immunity (measured by relative phenoloxidase activity) was assessed. In addition to that, I examined if juvenile hormone is the mediator of reduction in longevity induced by mating.
The energetic state of the spruce bark beetle (\kur{Ips typographus} (L.)): Implications for winter survival
BARTOŠOVÁ, Eva
The thesis deals with characterisation and changes of energetic status in the spruce bark beetle, Ips typographus, during pre-diapause, diapause and post-diapause quiescence.
Molecular and environmental factors connected to diapause and aging in insect
ZDECHOVANOVÁ, Lenka
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 tisue of an insect model species are inversely affected by contrasting photoperiods. The effect of photoperiod on per and Pdp1 mRNA levels was found to be mediated by the juvenile hormone. Our results provide the first experimental evidence for hormonal regulation of circadian clock gene expression in insects.

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