juvenile hormone


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Related to juvenile hormone: ecdysone

juvenile hormone

n.
Any of several hormones in insects that regulate various physiological processes, especially larval development and reproduction.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

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.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005
References in periodicals archive ?
Juvenile hormone stimulates pheromone tropic brain factor release in the female black cutworm Agrotis ypsilon.
Ecdysteroids, juvenile hormone and insect neuropeptides: Recent successes and remaining major challenges, Gen.
This insecticide acts as juvenile hormone mimic and a potent inhibitor of embryogenesis, metamorphosis and adult formation.
Transcription patterns of the studied genes indicated that TBT activated the transcription of RXR receptor, as it has been reported in gastropods and vertebrates, and altered the ecdysone and juvenile hormone receptor signaling pathways as reported in other studies.
Khafagi, "Effects of juvenile hormone I, precocene I and precocene II on the progeny of Microplitis rufiventris Kok.
Juvenile hormone has been described as part of a transduction system that assesses nutritional information and regulates reproduction in mosquitoes [96].
Improvement of biomass and juvenile hormone III (JH III) production from Cyperus aromaticus cell suspension culture via in situ membrane filtration technology.
Insect growth regulators include compounds that may affect moulting and metamorphosis by mimicking juvenile hormone activity (juvenile hormone agonists) or antagonizing juvenile hormone activity (ecdysteroids agonists) or by interfering with cuticle formation (chitin synthesis inhibitors) such as benzoylphenyl ureas (Oberlander et al., 1997; Phillips and Throne, 2010).
We used a sensitive invertebrate bioassay using metamorphosis of trochophore larvae of a marine annelid, Capitella, which responded within 1 h of treatment, to determine levels of bioactive compounds, demonstrating that the compounds had juvenile hormone activity, similar to the crustacean juvenile hormone methyl farnesoate (Laufer et al.
The 273 million DNA units that make up the monarch genome also include a complete set of genes for producing juvenile hormone, which summer butterflies use to kick-start reproduction.

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