By Alexander S. Raikhel (auth.), Kerry F. Harris (eds.)
Volume nine during this sequence comprises 4 chapters on vectors that impact human or animal wellbeing and fitness and 6 chapters on plant pathogens and their vectors. In bankruptcy 1, Alex S. Raikhel discusses vitellogenesis in mosquitoes: the cornerstone of the reproductive cycle concerning significant creation of yolk precursors through the fats physique and their accumulation in constructing oocytes. In anautogeneous mosquitoes, vitellogenesis relies at the availability of a blood meal and, to that end, is associated with transmission of pathogens. accordingly, elucidation of mechanisms governing the mosquito vitellogenesis is important for the winning improvement of novel suggestions in vector and disorder administration. prior stories on mosquito vitellogenesis have dealt predominantly with hormonal regulate. The objective of this overview, although, is to summarize major growth which has been accomplished in figuring out mosquito vitellogenesis on the mobile, biochemical and molecular degrees. it really is with those disciplines that we predict to totally comprehend the mechanisms governing this key technique in mosquito reproduction.
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Extra resources for Advances in Disease Vector Research
Biophys. Res. Comm. 155:436-442. 20. , 1986, Expression of the genes coding for vitellogenin (yolk protein), Ann. Rev. Entomol. 31:507-531. 21. , 1989, The roles of juvenile hormone, ecdysone and the ovary in the control of Drosophila vitellogenesis, J. Insect Physiol. 35:409-413. 22. , 1983, Estrogen stabilizes vitellogenin mRNA against cytoplasmic degradation, Cell. 34:207-214. 23. , FMRFamide- and pancreatic polypeptide-like immunoreactivity in midgut endocrine cells of a mosquito, Tissue Cell 18:419-428.
At least two hypotheses have been introduced in order to explain the coordinated cessation of Vg synthesis: (1) the programmed termination after exposure of the fat body to 20-HE (10); (2) feedback control resulting from the rising Vg titer in the hemolymph (11). An ovarian inhibitory factor or oostatic hormone may also be involved directly or indirectly in regulation of the cessation of Vg synthesis in the mosquito fat body (13, 14,80, 105). Termination of expression of Vg genes may occur simultaneously or precedes the actual cessation of Vg synthesis in the mosquito fat body.
69. 17. , 1985, Juvenile hormone and 20-hydroxyecdysone as primary and secondary stimuli of vitellogenesis in Aedes aegypti. Arch. Insect Biochem. Physiol 2:75-90. 18. , 1987. Biosynthesis, purification, and characterization of Aedes aegypti vitellin and vitellogenin, Arch. Insect Biochem. Physiol. 4:81-99. 1. Mosquito Vitellogenesis 33 19. , Mosquito vitellogenin subunits originate from a common precursor, Biochem. Biophys. Res. Comm. 155:436-442. 20. , 1986, Expression of the genes coding for vitellogenin (yolk protein), Ann.