Abstract:
Electromagnetic radiation (7%) emitted from the sun is in the UV range (200–400) nm. Several morphological and
anatomical changes have been reported from plants grown under long-term UV-B regimes. The effect of UV-B radiation
(280-320nm) and salinity alone and in combination were studied. Fifteen days old seedlings of Vigna radiata were exposed
to UV-B radiation for 10, 20 and 30 minutes and salinity treatment was given to the plants 3 days before the UV-B
treatment. UV radiation was artificially provided by Esco Airstream Vertical Laminar Flow Cabinet (AVC-4AI). Significant
decrease (p<0.05) in root and shoot length, specific leaf area, chlorophyll and carotenoid content of in all UV-B and salinity
treatments was observed as compared to control. The reduction was more pronounced in salinity treatment as compared to
UV-B alone and combination of UV-B with salinity. It is concluded that the short term exposure of UV-B radiation
enhances the salinity tolerance in Vigna radiata
