The oscillations in phenylalanine ammonia-lyase activity from Spirodela polyrhiza and phenylalanine ammonia-lyase and tyrosine ammonia-lyase activities from Lemna perpusilla displayed a circadian rhythm under continuous light. Rhythmicity in enzymic activity could not be detected in continuous
Lead (Pb(2+)) is a well-known highly toxic element, and Spirodela polyrrhiza is one of the hydrophytes most sensitive to Pb(2+), which might be highly toxic to photosynthesis. However, the mechanism by which Pb(2+) inhibits energy transfer and conversion efficiency remains unclear. Here, we report
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