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磷微蠕蚓(Microscolex phosphoreus)和壮伟环毛蚓(Pheretima robusta)体腔细胞的超微结构研究

Publication Date
  • 发光蚯蚓
  •  体腔细胞
  •  超微结构
  •  发光体系
  • Biology
  • Chemistry
  • Medicine


Bioluminescent earthworms (Oligochaeta) are world wide living. The bioluminescence system is contained within large, granule-filled coelomic cells except for some species. It is indicated considerable similarity in the system of bioluminescence in earlier research by the comparison physiology and biochemistry of many bioluminescence earthworms. However, recently experiment show the luminescence systems of the enchytraeids Fridericia heliota and Henlea sp. significantly differ from each other and from all luminescence systems of oligochaetes known to date.The luminous organs and luminescence systems of bioluminescence earthworms were reviewed, luminescence systems of typical earthworms were compared in this article. Coelomocytes of the oligochaeta Microscolex phosphoreus are observed by light microscope, scanning electron microscope (SEM), transmission electron microscope (TEM). Based on morphology, organelles and granules composition, pseudopodia shape, as well as behavioural traits, three main cell types were distinguished in the coelomic fluid: chloragogen cells, amoebocytes and granulocytes. Endoplasm of chloragogen cells is a lack of organelles. The chloragogen cells are composed of several larger chloragosomes in appearance. The amoebocytes are look like a round or oval flower in appearance. The amoebocytes are the most numerous cells in the coelomic fluid of Microscolex phosphoreus. Amoebocytes often form aggregations of a few to about a dozen cells. The cytoplasm contain numerous cytoplasmic organelles. Stellate pseudopodia, granules and empty vacuoles are distinguishing features in granulocytes. Stellate pseudopodia usually concentrate at one pole of the cell. Morphology and ultrastructure of Microscolex phosphoreus coelomocytes are presented on microgarphs: similarities and differences are compared to related coelomocytes of other species. Light microscope, scanning electron microscope, transmission electron microscope, were employed to classify and observe coelomocytes of the oligochaete Pheretima robusta. The three main types of coelomocytes were distinguished on the basis of light and electron microscope studies: chloragogen cells, type Ⅰamoebocytes, type Ⅱamoebocytes. The chloragogen cells are composed of numerous granules in appearance. The cytoplasm contains numerous chloragosomes and peroxisomes, and less organelles . The type Ⅰamoebocytes exterior contain numerous distinct drapes and heaves. There are numerous mitochondria and dissociative ribosomes in the cytoplasm. The typeⅡAmoebocytes exterior contains numerous small drapes and heaves. Ectoplasm of the type Ⅱ Amoebocytes contains large numbers of different size and shape vacuoles. The cytoplasm has round or oval mitochondria, rough endoplasmic reticulum and plentiful ribosome. Morphology and ultrastructure of Pheretima robusta coelomocytes are presented on microgarphs: similarities and differences are compared to related coelomocytes of other species and Microscolex phosphoreus

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