The nuclear envelope in guinea pig spermiogenesis

✍ Scribed by Gordon, Mildred

• Publisher: John Wiley and Sons
• Year: 1972
• Tongue: English
• Weight: 970 KB
• Volume: 173
• Category: Article
• ISSN: 0003-276X
• DOI: 10.1002/ar.1091730104

✦ Synopsis

In early stages of flagellar development the nuclear envelope on either side of the implantation fossa develops numerous pores. With condensation of the nucleus the envelope becomes excessive and these annulated portions of the envelope are reflected off the surface of the nucleus into the cytoplasm of the neck. The evaginated nuclear membranes enclose a residual mass of nucleoplasm which remains after the rest of the nucleus has polymerized, indicating either a storage of previously synthesized substances or a reserve of metabolically active nucleoplasm which may serve for the continued development of flagellar structures. A portion of the evaginated envelope is differentiated from the rest in lacking annuli and having a consistent 150 21-200 A cisternal space. This unannulated section differentiates in association with the adjunct of the proximal centriole and eventually surrounds the terminal end of the adjunct.