LEAF PHOTOSYNTHESIS AND TRANSPIRATION UNDER DIFFERENT LEVELS OF AIR FLOW RATE AND LIGHT INTENSITY IN CULTIVATED WHEAT SPECIES AND ITS WILD RELATIVES
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Photosynthetic rate per leaf area (P<SUB>A</SUB>) was positively correlated with transpiration rate, dark resipration rate, nitrogen content per leaf area and specific leaf weight. Optimum air flow rate for P<SUB>A</SUB> differed according to leaf size. Diploid species with smaller leaves showed the highest P<SUB>A</SUB> at lower air flow rate. In warmer season P<SUB>A</SUB> was higher in spring types while in cold season it was in winter types. Wild types generally showed high nitrogen content per leaf area and high P<SUB>A</SUB> as compared with cultivated types. Light saturation was not observed up to 80 klx for any of 20 strains investigated.
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