Scanning elctron microscopy of rat ova at early stages of fertilization
スポンサーリンク
概要
- 論文の詳細を見る
Surface ultrastracture has been studied in rat ova at early stages of fertilization after natural mating, comparing with the results of phase contrast microscopy.<BR>The ova were recovered 5 : 00 to 9 : 30 hours of estrus rat mated at 24 : 00 in proestrus. The ova were fixed for 90120 min. at room temperature (1820°C) in 2.5% glutaraldehyde solution buffered to pH 7.4 with 2 M Na<SUB>2</SUB>HPO<SUB>4</SUB> and NaH<SUB>2</SUB>PO<SUB>4</SUB> (1 : 1) and then immersed in 13% sucrose solution. The ova were washed 3 times in distilled water and then treated with 60% and 70% alcohol. The eggs were mounted on brass cylinder and dryed in room temperature.<BR>An information obtained with the scanning electron microscope is unobtainable by other methods.<BR>An effective depth and many microvilli can be seen on surface of rat ovum in zona free (Fig. 1).<BR>The process of sperm penetration into ooplasma was observed and sperm head attached to surface of ovum, intiating membrane fusion of anterior of the post-nuclear cap region to microvilli (Fig. 2-A. B.).<BR>Also, specific mode of incorporation of sperm tail was observed (Fig. 2-C. D.). The present photomicrographs confirm the conclusion for entry of sperm head drawn from transmisson electron microscopy.
- 日本繁殖生物学会の論文
日本繁殖生物学会 | 論文
- 近交系Hatanoラットに認められた春機発動時期および血漿中ホルモン濃度の系統差
- ラット卵子の自発的第一卵割に及ぼすCa2+/Mg2+不含培養液の影響
- 体外受精由来ウシ胚盤胞のガラス化保存においてバイオプシー後の培養時間が融解後の生存性に与える影響
- ブタ生体回収由来ガラス化胚の生存性の改善
- 卵細胞質内注入法を用いた牛の核移植