the results described here on the suppression of GA, UA, APA and ASA would indicate the disruption of soil function by the metal contamination in the soils
Nevertheless, soil enzymatic activity is believed to be a sensitive indicator of the effect of environmental factors on microbial functions
thus, because of their role in nutrient cycling, enzymes like GA, UA, APA and ASA are suggested to be good indicators of potentially beneficial or harmful effects on the soil