Locust juvenile

Zhou S., Zhang J., Hirai M., Chinzei Y. and Kayser H. et al. (2002) A locust DNA-binding protein involved in gene regulation by juvenile hormone. Mol. Cel. Endocrin. 190, 177-185. 

Ignell R., Couillaud F. and Anton S. (2001) Juvenile-hormone-mediated plasticity of aggregation behaviour and olfactory processing in adult desert locusts. J. Exp. Biol. 204, 249-259. 

Two of the better known "anti-juvenile "Hormone" agents, preco-cenes (9) and fluoromevalonate (10) are inhibitors of JH biosynthesis. The mode of action of fluoromevalonate at the molecular level is unknown. Elucidation of the mode of action of precocenes indicates that these plant chromene derivatives reach the site of JH biosynthesis, the corpora allata (CA), where they undergo a lethal epoxidation leading to extensive macromolecular alkylation and ultimately cause cell death (11, 12). Bioactivation of precocenes to the highly reactive precocene epoxide (13) in the corpora allata is almost certainly catalyzed by methyl farnesoate (MF) epoxidase (14), a cytochrome P-450 sonooxygenase (15) tdtich is the last enzyme of the JH biosynthetic pathway (at least in locusts and cockroaches). 

The synthesis of juvenile hormone (JH) in the insect corpora allata (CA) is controlled by an array of inhibitory and stimulatory factors originating in different parts of the retrocerebral complex and in the ovary. The nature of the factors involved and their interactions seem dissimilar in different insect groups, and it is premature, based on what is known to date (1.2), to formulate a unified model of allatal control for all insects. Differences may truly exist, however they may be a consequence of information inadequate to generalize from. Rather, we present herein a model of allatal control in the adult female locust during reproductive maturation, which may serve... 

Aedes aegypti, See Mosquito Allatal maturation, stimulation and inhibition in locusts, 152-161 Allatostatic ovary-derived factor, effect on juvenile hormone biosynthesis, 159-160,16U... 

Juvenile hormone-regulated locust vitellogenin genes Lack of expression after transfer into Drosophila." Arch. Insect Biochem. Physiol. Suppl. 1 35-46. 

Darrouzet, E., B. Mauchamp, G.D. Prestwich, L. Kerhoas, I. Ujvary, and F. Couillaud 1997. Hydroxy Juvenile hormones New putative juvenile hormones biosynthesized by locust corpora allata in vitro. Biochent 240 752-758. 

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