Ultrastructural changes in the abdominal midgut of the mosquito, Culiseta melanura, during the gonotrophic cycle

S. C. Weaver, T. W. Scott

Research output: Contribution to journalArticle

11 Scopus citations

Abstract

Abdominal midguts of the mosquito, Culiseta melanura, were examined by light and electron microscopy 1 hr-14 days days after blood feeding. Epithelial cells were drastically altered from columnar to squamous in form after engorgement, and returned to columnar by day 4 after feeding. Accumulation of mitochondria along brush borders of digestive cells, followed by the appearance of large secondary lysosomes, accompanied blood digestion. Evidence was obtained that myelin-like material in the lysosomes, probably the result of mitochondrial autolysis, is extruded into the lumen. Digestive cells resumed their pre-blood meal appearance by 10-14 days post-engorgement. Regenerative cells were scattered throughout the basal portion of the epithelium, along with endocrine cells. Other midgut cells containing large, microvilli-lined apical cavities were identified in most specimens. No evidence of division or differentiation was obtained for any cell types.

Original languageEnglish (US)
Pages (from-to)895-909
Number of pages15
JournalTissue and Cell
Volume22
Issue number6
DOIs
StatePublished - 1990
Externally publishedYes

Keywords

  • Culiseta melanura
  • Insecta
  • Mosquito
  • epithelium
  • midgut
  • ultrastructure

ASJC Scopus subject areas

  • Developmental Biology
  • Cell Biology

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