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Early physiological responses of conifers to sulphur dioxide as studied by optical spectroscopy of chlorophyll

Early physiological responses of conifers to sulphur dioxide as studied by optical spectroscopy of chlorophyll

Photosynthetica 23(2): 181-189

Various biophysical and biochemical methods have been used for the early diagnosis of forest decline caused by air pollution. Seven-year-old conifers (Pinus sylvestris and Picea abies) exposed to 0.81 mg/msuperscript 3 SO2 for 510 or 750 h were subjected to three test methods based on spectroscopic recording of disturbances of photosynthetic light reactions. The chlorophyll-protein index (a2/a1) was increased by 1-10% after such treatment.

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