Department of Horticulture, G. B. Pant University of Agriculture and Technology, Pantnagar-263 145 (Nainital)
*Present Address: Assistant Horticulturist, Fruit Research Station, Bhatinda-151 001.
The efficacy of various soil moisture regimes on photosynthesis and photores-piration in leaves of one and a half year-old pot-grown saplings of lemon, was studied at the Horticultural Research Centre, Patharchatta of G. B. Pant University of Agriculture and Technology, Pantnagar (Nainital) during autumn-1983 and spring-1984. The maximum rates of photosynthesis and photorespiration were observed in the trees irrigated at 20 per cent of moisture depletion which significantly decreased with the increase in moisture stress. Significantly higher rate of photosynthesis (1.54 folds) was recorded in autumn than in spring flush-leaves and that of photorespiration (3.44 folds) in spring as compared to autumn flush-leaves.
