EFFECRS OR A COMBINARION OF PHYSICAL AND CHEMIKAL FACTORS ON ECOLOGICAL AND PHYSIOLOGICAL RESPONSES OF HIGHER AQUATIC PLANTS CERATOPHYLLUM DEMERSUM
Objective: research ecological and physiological responses of higher aquatic plants submerged Ceratophyllum demersum on the combined effect of anthropogenic factors of chemical and physical nature. Methods: The model experiment in the laboratory. Aquatic plants C. demersum were affected coupling 100 mmol / l lead ions (consisting of lead acetate), and 1% solution of cationic surfactants at a water temperature + 36 ° C for 72 hours. Also we studied aftereffects factors for 120 hours. The combined influence of factors assessed by change of enzymatic activity in tissues of aquatic weeds (catalase, peroxidase, ascorbate oxidase, polyphenol oxidase) and content of malondialdehyde. Results: were discovered phenomenon of leaf chlorosis, partial defoliation, the appearance on leaves and stems of macrophytes and surface water surfactants, increases with increasing duration of the experiment. Effect of a combination of factors has led to development of oxidative stress and increase of activity of antioxidant enzymes. Research aftereffects of anthropogenic factors showed failure of 120 hours for a full recovery of macrophytes. Scientific novelty: for the first time investigated combined effect of physical and chemical factors on water plant, rated aftereffect, identified specific defensive reactions C. demersum, associated with changes in the activity of the antioxidant system and the work and ascorbate oxidase, polyphenol oxidase. Practical value: the results of research can be applied to change the technology of phytoremediation of wastewater with aquatic plants.