Occurrence of apoptosis in serosa of Periplaneta americana L. (Blattaria: Blattidae) ultrastructural and biochemical features

Sergio Barni, Simonetta Lambiase, Aldo Grigolo, Luciano Sacchi, Silvia Corona, Anna Ivana Scovassi, Ugo Laudani

Research output: Contribution to journalArticlepeer-review

Abstract

In 16-17-day-old embryos of Periplaneta americana, the amnion-serosa penetrates the cavity of the middle intestine, where it forms a cluster of compressed roundish cells. We demonstrated that these cells degenerate throughout apoptosis. The programmed cell death revealed by morphological and biochemical approaches showed all the apoptotic steps: chromatin fragmentation and pyknosis, cytoplasm condensation, karyorrhexis, cytoplasm cleavage. Nevertheless, some ultrastructural peculiarities (atypical heterochromatin arrangement, appearance of nuclear envelope protrusions, absence of nucleolar structures) suggest that the apoptotic expression partially depends on the biological situation (type of organism and inducing factors) in which the programmed cell death takes place. The presence of histiocytic cells internalizing cell debris, of apoptotic and non-apototic derivation, may be correlated with the importance of recycling substances useful for embryo growth.

Original languageEnglish
Pages (from-to)999-1008
Number of pages10
JournalJournal of Insect Physiology
Volume43
Issue number11
DOIs
Publication statusPublished - Oct 1997

Keywords

  • Apoptosis
  • Dorsal organ
  • Embryogenesis
  • Periplaneta americana
  • Serosa

ASJC Scopus subject areas

  • Insect Science
  • Physiology

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