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 1 mt to 4 mt (3.06×103ergs/mm2 to 12.24×103ergs/mm2). The cytological effects under each experiment were quantitatively and qualitatively estimated at metaphase and anaphase stages. The qualitative 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.
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