juvenile hormone

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juvenile hormone

n.
Any of several hormones in insects that regulate various physiological processes, especially larval development and reproduction.

juvenile hormone

a hormone present in juvenile insects and secreted by the CORPUS ALLATUM of the brain. So long as it is produced, the cuticle maintains the characteristics of the nymphal or larval form at each moult. Only when it ceases to be present or the level falls below a threshold value does the insect moult to the adult form. Juvenile hormones have been used as an effective means of controlling insects, for example, in preventing the development of adult ants during hospital infestations.

juvenile

1. pertaining to young animals; young or immature.
2. a cell, tissue, disease or organism intermediate between the immature and mature forms.

juvenile aponeurotic fibroma
see multilobular chondroma and osteoma.
juvenile bovine leukosis
see bovine viral leukosis.
juvenile cellulitis
see juvenile pyoderma.
juvenile hormone
juvenile hormone insect growth hormone; regulates larval development and metamorphosis. It acts to maintain the larval stage and retard maturation to the adult stage. See also insect growth regulators.
juvenile osteoporosis
see osteogenesis imperfecta.
juvenile pancreatic atrophy
see pancreatic acinar atrophy.
juvenile sterile granulomatous dermatitis and lymphadenitis
see juvenile pyoderma.
References in periodicals archive ?
These two events are regulated by the steroid 20-hydroxyecdysone, and the sesquiterpenoid juvenile hormone [26].
Contributors in a wide range of biological sciences explain methods for investigating mechanisms of action of juvenile hormones and their analogues and for estimating their environmental fate and potential adverse affects using an in silica quantitative structure-activity-relation (QSAR) approach.
Cellular and molecular actions of juvenile hormone I: general considerations and premetamorphic actions.
Juvenile hormones play a central role in caste differentiation - a two molt process for termite soldiers during which dramatic morphological changes occur.
Novel phenoxy juvenile hormone analog (pyriproxifen) suppresses embryogenesis and adult emergence of sweet potato whitefly.
Regulation of vitellogenesis in insects: The pleiotropic role of juvenile hormones.
Contents include articles on the juvenile hormones, circadian organization of the endocrine system, ecdysteroid chemistry and biochemistry, as well as new chapters on insulin-like peptides and the peptide hormone Bursicon.
JHAs interfere with normal function of glands that produce juvenile hormones.

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