Ultrastructural study of the ovary of the sugarcane spittlebug Mahanarva fimbriolata (Hemiptera)

Micron : the International Research and Review Journal for Microscopy
Débora Caperucci, Maria I Camargo-Mathias

Abstract

The present study describes the ultrastructure of meroistic telotrophic ovaries of the sugarcane spittlebug Mahanarva fimbriolata. In this type of ovary, nurse cells, oogonia, and prefollicular tissue are located at the terminal (distal) regions or tropharium of ovarioles. Oocytes in different developmental stages, classified from I to V, are observed in the vitellarium. Stage I oocytes do not exhibit intercellular spaces in the follicular epithelium, suggesting that synthesis and production of yolk during this stage occurs only through endogenous processes. Small yolk granules of different electron densities are present in the cytoplasm. Few lipid droplets are observed. Stage II oocytes exhibit small intercellular spaces in the follicular epithelium. More protein as well as lipid yolk granules are observed in the cytoplasm. In stage III oocytes, intercellular spaces in the follicular epithelium are larger than those observed in the previous stage. Electrondense protein granules of various sizes, larger than those observed in stage II oocytes predominate in the cytoplasm. Smaller lipid droplets are also present. In stage IV oocytes, the follicular epithelium exhibits large intercellular spaces. Our data clearly indicate that th...Continue Reading

References

Jan 1, 1979·Biochimie·J M Legay
Jan 1, 1969·Annual Review of Entomology·H E Hinton

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Citations

Sep 16, 2006·Micron : the International Research and Review Journal for Microscopy·Débora Caperucci, Maria Izabel Camargo Mathias
Feb 15, 2008·Cell Biology International·Gislaine Cristina RomaMaria Izabel Camargo-Mathias

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