Untersuchungen zum Feinbau des Nukleolus und der Nukleolusorganisatorregion vonGnetum gnemon

✍ Scribed by Karl Carniel

• Book ID: 104749467
• Publisher: Springer-Verlag
• Year: 1975
• Tongue: English
• Weight: 465 KB
• Volume: 125
• Category: Article
• ISSN: 0032-0935
• DOI: 10.1007/bf00385597

✦ Synopsis

In Gnetum gnemon the nucleoli of tapetum cells and cells of the anther wall are made up during the interphase-stage of electron dense granules 18-20 nm in diameter and electron dense fibrils 8-10 nm in diameter. At the outside of the nucleolus or within it there can be found one to five distinct zones of low electron density (Fig. 1, LK). The LK is composed of ± tightly packed fibrils 7-8 nm in diameter. Nucleolus associated heterochromatin is never directly attached to the nucleolus but joined in certain cases through the LK.