[Imprinting of temperature effects in the embryogenesis of the hypothalamo-hypophyseal-adrenal system of domestic hens].
Three groups of chick embryos were subjected to periodic cold exposures at the 1st (I), 2nd (II) and 3rd (III) weeks of incubation. Within the first month after hatching, glucocorticoid content of the blood plasma was measured in chicks. The reaction of the adrenals to corticotropin was checked in 2-month chicks. The activity of the adrenals was higher in the chicks from group III: they exhibited higher glucocorticoid concentration at the first week after hatching and later had more intensive reaction to ACTH. The rate of the adrenal reactions was also higher in group II. It was demonstrated that during the imprinting of thermal influences, glucocorticoid concentration in the blood plasma rapidly increases. The relation of the imprinting to ontogenetic re-arrangements in the endocrine system is discussed.
D000818:Animals; D002642:Chick Embryo; D003080:Cold Temperature; D005260:Female; D005938:Glucocorticoids / Q000097:blood; D007030:Hypothalamo-Hypophyseal System / Q000196:embryology*; D007173:Imprinting, Psychological / Q000502:physiology*; D010913:Pituitary-Adrenal System / Q000196:embryology*; D013696:Temperature; D013997:Time Factors
D005938:Glucocorticoids
Zapetchatlevanie temperaturnykh vozdeĭstviĭ v émbriogeneze gipotalamo-gipofizarno-adrenalovoĭ sistemy domashnikh kur.