Antioxidant responses of Atlantic Forest native tree species as indicators of increasing tolerance to oxidative stress when they are exposed to air pollutants and seasonal tropical climate

•The climatic conditions and air pollutants influenced the biochemical leaf traits.•CAT was considered the biochemical leaf trait indicator of tolerance in wet season.•Dry season environmental conditions were more stressful to the Brazilian tree species.•GSH, chl and MDA were biochemical indicators of oxidative stress in dry season.•C. floribundus is the most efficient species in tolerating the oxidative stress.