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Tolerance of sunflecks in Phaseolus vulgaris

Responses of French bean plants to short simulated sunflecks are described by Tsonev et al. (pp. 343-352). A slight protection of photosystem II from the effects of the sunfleck is reported when plants are grown at cooler temperatures (10 degrees C down from 20 degrees C). The effect of lowered oxygen concentrations suggests that photorespiration acts as a safety valve for excess energy.





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