Irradiation Studies on the Karyology of Charophyta II. Ultraviolet light

Abstract

The experimental materials that were subjected to UV light are antheridium of N. opaca, N. flagelliformis and C. fibrosa, collected from local ponds of Varanasi district. The exposure time of UV ranged from 1mt to 4mt (3.06X103 ergs/mm2 to 12.24X103 ergs/mm2). The cytological effects under each experiment were quan titatively and qualitatively estimated at metaphase and anaphase stages. The quali tative changes were very much similar to those found with X-rays and gamma-rays. A comparative assessment of chromosomal effects on Tradescentia by earlier workers and of those on charophyte taxa recorded in the present study revealed more or less similar radioresponse to UV light. © 1977, Japan Mendel Society, International Society of Cytology. All rights reserved.