Chemical Property of Diapause hormone
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Chemical Property:
- Purity/Quality:
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99% *data from raw suppliers
Safty Information:
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Useful:
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Description
DH is synthesized by the subesophageal ganglion (SG).
It is released into the hemolymph via the corpus cardiacumcorpus
allatum (CC-CA) complex, and targets the developing
ovaries during pupal-adult development to induce
the embryonic diapause of the silkworm Bombyx mori.
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Biological functions
B. mori DH acts on the developing ovaries during the
middle pupal stage and transfers the DH signal into the
oocyte via DHR. At 2–3 days after egg-laying, the eggs
reach the diapause stage, with the enlargement of both
extremities of the embryo and the completion of mesoderm
segregation.?In developing ovaries, DH is known
to enhance trehalase activity on the oolemma, which
leads to the accelerated incorporation of hemolymph trehalose
by the oocyte and finally, to higher levels of glycogen
deposition, compared to the oocyte without the DH
signal. This glycogen is utilized for the production of sorbitol
and glycerol along with the diapause. DH promotes
trehalase activity via upregulation of the trehalase gene,
during the period when Ca2+ and protein kinase C are
involved in signal transduction.In Orgyia thyellina, DH
induces seasonal reproductive polyphenism, including
the egg diapause.
