- juvenile hormone
A hormone found in insects which affects the balance between mature and juvenile attributes of certain tissues at each moult. In particular, the imaginal discs of many larval insects only develop into adult wings, sexual organs or limbs when blood juvenile hormone levels fall below a threshold level. There is a complex interaction between juvenile hormone and ecdysone. Synthetic analogues of JH include farnesol and methoprene, which have been tested for insecticide potential (known, with diflubenzuron, as Insect Growth Regulators, IGRs; see also chitin).
Dictionary of molecular biology. 2004.
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Juvenile hormone — Juvenile hormones (JHs) are a group of acyclic sesquiterpenoids that regulate many aspects of insect physiology. JHs regulate development, reproduction, diapause, and polyphenisms. In insects, JH (formerly called neotenin) refers to a… … Wikipedia
juvenile hormone — (Zo/ 94l.) n. A hormone secreted by insects which inhibits the molting of an insect from its juvenile into its adult form; also, substances having similar activity, but produced by plants. [PJC] … The Collaborative International Dictionary of English
juvenile hormone — n. a hormone secreted by insects that regulates growth and metamorphosis and which must be absent for the emergence of an adult: used to inhibit insect growth, as for preventing insect reproduction … English World dictionary
juvenile hormone — Biochem. any of a class of insect and plant hormones acting to inhibit the molting of a juvenile insect into its adult form. [1935 40] * * * ▪ biochemistry also called Neotenin, a hormone in insects, secreted by glands near the brain,… … Universalium
juvenile hormone — noun Date: 1940 an insect hormone that is secreted by the corpora allata, inhibits maturation to the imago, and plays a role in reproduction … New Collegiate Dictionary
juvenile hormone — (ARTHROPODA: Insecta) A hormone of larvae produced by the corpora allata that controls the way the larval cells differentiate at each molt … Dictionary of invertebrate zoology
juvenile hormone — noun Entomology a hormone regulating larval development in insects … English new terms dictionary
juvenile hormone — A hormone secreted by insects from a pair of endocrine glands close to the brain. Its function is to inhibit metamorphosis so maintaining the larval features … Glossary of Biotechnology
juvenile hormone — noun : an insect hormone that is secreted by the corpora allata, inhibits maturation to the imago, controls maturation of eggs and yolk deposition in the imago, and has been used experimentally to control pest insects by disrupting their life… … Useful english dictionary
juvenile hormone — the secretion of the corpora allata which prevents metamorphosis, keeping the insect in the larval state and ensuring that the larva will molt several times and reach large size before pupating … Medical dictionary