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Two kinds of Polygonum species (Polygonum hydropiper and Polygonum lapathifolium) grown vigorously on acid soils were compared to investigate the physiological and photosynthetic responses under five Al3+ treatments (0, 25, 50, 100 and 400 mmol L-1) in a hydroponic experiment. The results showed that under 400 mmol L-1 Al3+, the malondialdehyde (MDA) content and transpiration rate (Tr) were significantly...
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