PHOTOSYNTHESIS, DRY MATTER PRODUCTION AND YIELD PERFORMANCE OF LENTIL VARIETIES UNDER HIGH TEMPERATURE (Short communication)
Climate is changing and air temperature is rising due to increasing concentration of CO2 and other atmospheric greenhouse gases. The rise in atmospheric temperature causes detrimental effects on growth, yield, and quality of the crop varieties by affecting their phenology, physiology, and yield components. A pot experiment was carried out with ten high yielding lentil varieties to assess the effects of high temperature (340C) on physiological parameters yield attributes and yield and to find out temperature stress tolerant varieties. Temperature treatments viz. (i) Ambient, (ii) 34oC at flower initiation stage and (iii) 34oC at pod filling stage of the 10 lentil varieties viz. Binamasur-2, Binamasur-3, Binamasur-4, Binamasur-5, Binamasur-6, Binamasur-7, Binamasur-8, Binamasur-9, Binamasur-10 and BARI masur-5 were imposed separately for 7 days in plant growth chamber. Photosynthesis, chlorophyll content in leaves, total dry matter and yield attributes decreased under high temperature. Temperature imposed at pod growth stage had greater negative effect. The higher yield reduction was recorded in Binamasur-2 and Binamasur-3. But the yield loss under high temperature was less in two varieties viz. Binamasur-6 and Binamasur-8.
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