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Structure and Ultrastructure of the Endodermal Region of the Alimentary Tract in the Freshwater Shrimp Neocaridina heteropoda (Crustacea, Malacostraca). | LitMetric

AI Article Synopsis

  • The freshwater shrimp Neocaridina heteropoda is a globally popular aquarium species originating from Asia, with detailed studies conducted on its midgut structure using advanced imaging techniques.
  • The endoderm of N. heteropoda consists of an intestine and hepatopancreas, showing no structural differences between males and females, with distinct regions and cell types identified in both organs.
  • The research highlights the functional significance of E-cells, which are regenerative cells in the midgut, and introduces findings on a new type of intercellular junction associated with these cells in Crustacea.

Article Abstract

The freshwater shrimp Neocaridina heteropoda (Crustacea, Malacostraca, Decapoda) originates from Asia and is one of the species that is widely available all over the world because it is the most popular shrimp that is bred in aquaria. The structure and the ultrastructure of the midgut have been described using X-ray microtomography, transmission electron microscopy, light and fluorescence microscopes. The endodermal region of the alimentary system in N. heteropoda consists of an intestine and a hepatopancreas. No differences were observed in the structure and ultrastructure of males and females of the shrimp that were examined. The intestine is a tube-shaped organ and the hepatopancreas is composed of two large diverticles that are divided into the blind-end tubules. Hepatopancreatic tubules have three distinct zones - proximal, medial and distal. Among the epithelial cells of the intestine, two types of cells were distinguished - D and E-cells, while three types of cells were observed in the epithelium of the hepatopancreas - F, B and E-cells. Our studies showed that the regionalization in the activity of cells occurs along the length of the hepatopancreatic tubules. The role and ultrastructure of all types of epithelial cells are discussed, with the special emphasis on the function of the E-cells, which are the midgut regenerative cells. Additionally, we present the first report on the existence of an intercellular junction that is connected with the E-cells of Crustacea.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4440751PMC
http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0126900PLOS

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