Biomaterial Database

Hydrolytic degradation of juvenile hormones in haemolymph and corpora allata of Galleria mellonella (L). 1991

E Szołajska

Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Warszawa.

Hydrolytic rates of juvenile hormones (JHs) I, II and III by the corpora cardiaca-corpora allata complex (CC-CA) and by the haemolymph of Galleria mellonella remain in the same order (III greater than I greater than II in CC-CA and I greater than III greater than II in haemolymph) throughout the last larval instar. Haemolymph hydrolytic activity shows peak at the end of feeding when 80 pmol JH I versus 15 pmol JH II is degraded per 1 microliter and minute; hydrolysis rapidly declines in the apolysing insects. Hydrolytic rates in CC-CA reach a maximum of 240 fmol/pair per min for JH III and 85 fmol/pair per min for JH II in pharate pupae. Brain implantations or chilling of freshly ecdysed last instar larvae, which are known to elevate JH titer and induce supernumerary larval molt, do not affect JH hydrolysis. The results indicate that the dominance of JH II in Galleria may be at least partly controlled by preferential hydrolysis of homologs I and III.

UI	MeSH Term	Description	Entries
D007605	Juvenile Hormones	Compounds, either natural or synthetic, which block development of the growing insect.	Insect Growth Regulator,Insect Growth Regulators,Juvenile Hormone,Growth Regulators, Insect,Regulators, Insect Growth,Growth Regulator, Insect,Hormone, Juvenile,Hormones, Juvenile,Regulator, Insect Growth
D007915	Lepidoptera	A large order of insects comprising the butterflies and moths.
D003335	Corpora Allata	Paired or fused ganglion-like bodies in the head of insects. The bodies secrete hormones important in the regulation of metamorphosis and the development of some adult tissues.	Corpus Allatum,Corpus Cardiacum,Allata, Corpora,Allatum, Corpus
D006458	Hemolymph	The blood/lymphlike nutrient fluid of some invertebrates.	Hemolymphs
D006868	Hydrolysis	The process of cleaving a chemical compound by the addition of a molecule of water.
D000818	Animals	Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA.	Animal,Metazoa,Animalia