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Schröder, P. ; Matucha, M.* ; Forczek, S.T.* ; Uhlirova, H.* ; Fuksová, K.* ; Albrechtova, J.*

Uptake, translocation and fate of trichloroacetic acid in a Norway spruce/soil system.

Chemosphere 52, 437-442 (2003)

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Open Access Gold as soon as Publ. Version/Full Text is submitted to ZB.

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Trichloroacetic acid (TCA) is a secondary atmospheric pollutant formed by photooxidation of chlorinated solvents in the troposphere––it has, however, recently been ranked among natural organohalogens. Its herbicidal properties might be one of the factors adversely affecting forest health. TCA accumulates rapidly in conifer needles and influences the detoxification capacity in the trees. The aim of the investigations––a survey of which is briefly given here––was to elucidate the uptake, distribution and fate of TCA in Norway spruce. For this purpose young nursery-grown plants of Norway spruce (Picea abies (L.) Karst.) were exposed to [1,2-¹⁴C]TCA and the fate of the compound was followed in needles, wood, roots, soil and air with appropriate radio-indicator methods. As shown by radioactivity monitoring, the uptake of TCA from soil by roots proceeded most rapidly into current needles at the beginning of the TCA treatment and was redistributed at later dates so that TCA content in older needles increased. The only product of TCA metabolism/biodegradation found in the plant/soil-system was CO₂ (and corresponding assimilates). TCA biodegradation in soil depends on TCA concentration, soil humidity and other factors.

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