Influence off Levels of Leaf Expression of Apple Mosaic on Net Photosynthesis and Transpiration of Leaves of Four Apple Cuitivars
DOI:
https://doi.org/10.71318/apom.1990.44.1.45Abstract
Net photosynthesis and transpiration of leaves of 4 apple cultivars displaying progressive levels of chlorosis due to apple mosaic ( Marmor mali) were measured in the field. There was a linear depression of both net photosynthesis (Pn) and transpiration (Tr) with increasing chlorosis on the leaves of all 4 cultivars. ‘Jonathan,’ which exhibited the most severe symptoms in the field, had very low Pn rates at each level of symptom expression.
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