Photosynthesis and transpiration of diseased wheat leaves in field were measured with CI- 301PS(CID, Inc,USA)
Photosynthetic System in the semi - arid region. The results show that obvious changes were happened, that is to say the
photosynthesis rate decreased, while intercellular CO2concentration, stomatal resistance and the transpiration rate increased in
comparison with those of the healthy plants, also there are different diurnal changes in photosynthesis and transpiration of diseased
wheat leaves with various severity of stripe rust infection in field in the semi-arid region.