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Our investigations have focused on observations concerning the horse-chesnut’s (Aesculus hippocastanum L.) leaves in various phenophases, the state of the leaf surfaces and histo-anatomical changes of the leaves under the influence of the atmosphere pollutants (sulphur dioxide, chlorine, ammoniac, lime or cement powders). The histo-anatomical changes induced by the gaseous and solid atmosphere pollutants on the lamina have been observed in protecting tissues, assimilator tissues (the palisade and the spongy tiss...

In our paper, the investigations have focused on observations regarding the physiological and biochemical changes on the horse-chesnut’s (Aesculus hippocastanum L.) leaves during their ontogenetic cycle under the influence of the atmosphere pollutants (sulphur dioxide, chlorine, ammoniac, lime or cement powders). The foliar chlorosis and necrosis represent the clear manifestation of deep physiological modifications, as well as severe structural alterations, which affect the average content of water, dry matter, ...