Role of gibberellic acid in abolishing the detrimental effects of Cd and Pb on broad bean and lupin plants.

This work describes the changes in photosynthetic pigments, soluble carbohydrates, proteins and activities of certain enzymes of both broad bean and lupin plants in response to heavy metals (Cd or Pb), 3 gibberellic acid (GA ) and their interactions. Significant reduction in contents of chlorophylls, soluble carbohydrates, soluble proteins were recorded in tested plants due to the treatment with either Cd or Pb. 3 Application of GA , in most cases, decreased contents of chlorophylls and soluble carbohydrates in absence and presence of either Cd or Pb, while contents of soluble proteins were markedly increased. All applied treatments greatly affected the activities of amylases, proteases, catalases and peroxidases in both 3 broad bean and lupin plants. Generally, it could be concluded that GA have (to some extent) a beneficial regulatory role in plants grown under both Cd and Pb polluted conditions.

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