corpora allata การใช้

• Juvenile hormone is synthesised in the corpora allata.
• The corpora allata is responsible for the production of juvenile hormone ( JH ).
• This is achieved by paracrine release of Allatostatin from neurons in the brain which terminate in the corpora allata.
• O鯿yte growth in the brown-banded cockroach correlated with corpora allata activity " in vitro ".
• Juvenile hormone production, juvenile hormone esterase, and juvenile hormone acid methyltransferase in corpora allata of Manduca sexta.
• Generally, the removal of the corpora allata from juveniles will result in a diminutive adult at the next moult.
• Implantation of corpora allata into last larval instars will boost JH levels and hence produce a supernumary ( extra ) juvenile instar etc.
• The regulation of the female sex pheromone production, calling behaviour and release is regulated directly and indirectly by the corpora allata and juvenile hormone.
• Among queenless " B . terrestris " workers, the corpora allata, which secrete JH, was noticeably enlarged compared to queenright workers.
• PTTH also stimulates the corpora allata, a retrocerebral organ, to produce juvenile hormone ( JH ), which prevents the development of adult characteristics during ecdysis.
• In the bean bug, " Riptortus pedestris ", clusters of neurons on the protocerebrum called the pars lateralis maintain reproductive diapause by inhibiting JH production by the corpora allata.
• When the fourth instar " Rhodnius " had its corpora allata removed, both contained a third instar level of JH and hence one proceeded to instar four, and the other remained at this instar.
• When the corpora allata of the third instar insect were removed, the level of JH was equal in both insects to that in the fourth instar animal, and hence both proceeded to the fifth instar at the next moult.
• A recent publication by Nouzova et al . ( 2015 ) shows that allatostatin C, the peptide which inhibits JH production by the corpora allata, blocks the transport of citrate out of the mitochondrion in " Aedes aegypti ".
• They are also consistent with a model advanced by others that corpora allata maintained in vitro of day 0 M . sexta larva secrete high levels of JH, but that the shift to producing only JH acid at day 4, which is then methylated by imaginal discs to generate the JH peak.
• Smith and Schal came to this conclusion because both pheromone production and calling failed to occur after allatectomy; both pheromone production and calling could be restored by a corpora allata implantation or treatment with juvenile hormones; applications of a juvenile hormones to intact females advanced the age of pheromone production and NCA-I " transection ", which activates the copora allata in other cockroaches, advanced the age of pheromone production and calling.