Development of Oocyte of Synaptura commersonii, Emphasizing on Zona Radiata and Egg Membrane by Light and Scanning Electron Microscopes

Authors

  • Sunsunee Huntamai
  • Amporn Thongkukiatkul ภาควิชาชีววิทยา คณะวิทยาศาสตร์ มหาวิทยาลัยบูรพา

Abstract

 The present research aimed to study on formation of zona radiata of Synaptura commersonii during oocyte development stages. The ovarian samples were taken from animal bodies and fixed in Bouin’s solution. The paraffin embed samples were sectioned at 7 µm-thickness which were stained with Hematoxylin & Eosin (H-E) and studied by using light microscopy. Some sections were coated with gold and studied by using scanning electron microscopy. At cortical alveoli stage, the zona radiata (ZR) was appeared as a thin layer (2.0-2.8 mm) and during vitellogenesis, ZR thickness was greatest (4.0-6.0 mm). Striations were obviously seen in the ZR layer. The external surfaces of the ZR, many pores could be distinguished. The egg of S. commersonii was round.  The outer surface showed a slight undulating status.  S. commersonii ‘ s egg exhibited a type 3 micropyle. Keywords :  Synaptura commersonii, zona radiata, light microscopy, scanning electron microscopy

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Published

2017-03-17