SENSITIVITY OF UV IRRADIATION AND CHEMICAL TREATMENTS IN RICE PLANTS TOWARDS PHYSIOLOGICAL AND AGRONOMICAL CHARACTERISTICS

Research on genetic variation due to the response of plants to Ultra- violet (UV) radiation and chemical stress for desirable characters creation favorable for developing future approach of crop improvement is discussed. The endeavor has been performed to determine the consequence of UV radiation and chemical treatments on rice plants in field condition. Effect of UV rays and (30%) hydrogen peroxide (H2O2) treatment on rice seed towards the agronomical and physiological alteration of plants is highlighted. Germination percentage and mean first seedling length were calculated and observed to decline in the order of control, UV, chemical treatment conditions. Net photosynthesis rate (Pn), Rate of transpiration, the utmost photochemical efficiency of PSII (Fv/Fm), and Electron transport rate were calculated as the critical physiological parameters. Physical mutagen like UV radiation has exhibited superior effect than the chemical treatment conditions in all above characters except for the electron transport rate. Dry weight of leaf and Leaf area were calculated and depicted their decline in the order of control, UV and chemical treatment conditions.