Prothoracic glands | definition of prothoracic glands by Medical dictionary
insect structures that originate from the ectoderm of the ventrocaudal part of the head and serve as a source of ecdysone.
prothoracic glands the glands in an insect activated by a hormone from the neurosecretory cells in the brain that secrete the MOULTING HORMONE ecdysone. The glands have a cyclic activity within each INSTAR and break down on METAMORPHOSIS. They induce moulting, which in most insects occurs only in the juvenile stage, and in the absence of JUVENILE HORMONE stimulate metamorphosis.
References in periodicals archive
Skarlatos G, Dedos, Hajime Fugo, 1996: Effects of fenoxycarb on the secretory activity of the prothoracic glands
in the fifth instar of the silkworm, Bombyx mori.