Three methods of determining photosynthesis in drought-stressed wheat leaves were evaluated as possible screening tests for drought resistance. Potential photosynthesis in detached leaves as measured by the differential respirometer was considerably higher in Pitic 62 than in other cultivars after 4 h recovery from drought stress. However, actual photosynthesis as indicated by infrared gas analysis varied little among cultivars after overnight recovery from drought. Assimilation of 14CO2 was slightly higher in Pitic 62 in moderately drought-stressed plants, and twice as high as in other cultivars under severe stress. It was concluded that potential photosynthesis as measured with the differential respirometer and verified by 14CO2 incorporation have potential as screening techniques for drought resistance.