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:: Volume 4, Issue 13 (Fall 2013) ::
JPG 2013, 4(13): 1-8 Back to browse issues page
Study of the Zona Radiata Structure in Oocytes of the Persian Sturgeon (Acipenser persicus) before and after Fertilization
Ali Moghaddam *, Shahrbanoo Oryan, Nader Shabanipour
Kharazmi University , moghaddam7@yahoo.com
Abstract:   (15914 Views)
Egg envelope or otherwise called zona radiata (ZR) is an acellular area that originates next to oolemma externally. It grows and thickens gradually from oolemma and follicular epithelium both. Microscopic studies on the tissue sections hava shown that during developmental stages of oocytes, ZR could not be observed at stage I (Primary growth stage) in Acipenser persicus. It appeared in stage II (Cortical alveolar stage) and during stage III (vitellogenesis), ZR thickness was greatest and had highest complexity. The striated appearance of ZR at this stage, were identified to be pore-canals involved in yolk material transportation. In stage IV (Maturation stage), a decline was observed in ZR thickness and complexity, a process which continued after fertilization. In mature egg, an uneven layer of chorion over ZRe (ZR, external) and a jelatinous coat extrachorion were developed. Immediately after fertilization, ZRi (ZR, internal) turned to a homogenous layer (fertilization envelope), probably because of cortical reaction. 30 minutes after fertilization, two layers recognized in ZRi and chorion and extrachorion were disappeared.
Keywords: Zona radiata, Oocyte, Persian sturgeon, Acipenser persicus
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Type of Study: Basic and Original Research | Subject: Marine Biology & Biotechnology
Received: 2014/02/5 | Accepted: 2014/02/5 | ePublished: 2014/02/5
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Moghaddam A, Oryan S, Shabanipour N. Study of the Zona Radiata Structure in Oocytes of the Persian Sturgeon (Acipenser persicus) before and after Fertilization. JPG. 2013; 4 (13) :1-8
URL: http://jpg.inio.ac.ir/article-1-202-en.html

Volume 4, Issue 13 (Fall 2013) Back to browse issues page
نشریه علمی پژوهشی خلیج فارس Journal of the Persian Gulf
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