Efeitos do flor em folhas de plantas aquticas de Salvinia auriculata

Abstract – The objective of this work was to evaluate the effects of fluoride on leaves of aquatic Salviniaauriculata Aubl., to supply subsidies for the use of this species as an environmental pollution bioindicator. Theplants were cultivated under controlled conditions in pots containing nutritive solutions, and were submitted tosimulated rain containing KF, in concentrations of 0, 13, 26 and 39 mM, in the morning, during five consecutivedays. Results evidenced the occurrence of morphological and anatomical damages involving trichome andadaxial surface of the leaf necrosis. Alterations in the activity of peroxidase, polyphenoloxidase, superoxidedismutase, and catalase enzymes indicated the occurrence of oxidative damages in response to fluoride, althoughlipid peroxidation tests showed negative results. Alterations in pigment concentration also pointed to theoccurrence of oxidative stress, caused by fluoride present in the simulated rain. The morphological, anatomical,enzymatic, and pigment composition alterations in