Lichen physiology and air pollution: II. Statistical analysis of the correlation between SO , NO , NO and O , and chlorophyll content, net photosynthesis, sulphate uptake and protein synthesis of Parmelia sulcata Taylor.

Samples of the lichen Parmelia sulcata Taylor were collected in the vicinity of 17 air pollution monitoring stations in the northern part of Switzerland and its bordering area. Net photosynthesis, dark respiration, and the content of [ S]-sulphate and [ S]-protein after cultivation with SO , as well as the chlorophyll and protein contents were measured. Mean values of dark respiration and protein content were not significantly different in the plant material from the various locations.