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Weissflog, L.* ; Kruger, G.H.J.* ; Forczek, S.T.* ; Lange, C.A.* ; Kotte, K.* ; Pfennigsdorff, A.* ; Rohlenova, J.* ; Fuksová, K.* ; Uhlirova, H.* ; Matucha, M.* ; Schröder, P.

Oxidative biodegradation of tetrachloroethene in needles of Norway spruce (Picea abies L.).

S. Afr. J. Bot. 73, 89-96 (2007)
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Open Access Green as soon as Postprint is submitted to ZB.
Through employing [14C]-PER exposure experiments it was shown for the first time that PER taken up by drought-stressed spruce needles via the air/needle pathway is preferably degraded to trichloroacetic acid (TCA) in the chloroplasts.TCA formed by oxidative biotransformation is mineralised to CO2 and HCl via various degradation routes. HCl contributes to increased proton concentration in the chloroplast, inducing a pH shift leading to a pathophysiological effect on H+ transport from the thylakoid interior into the stroma. As a result of their high degree of dissociation and related protonation, the PER metabolites, TCA and HCl, cause a change in protein structures. In addition to this, the TCA anions created in the process may lead to destabilisation of the thylakoid membrane potential. The damage to the chloroplasts inflicted by protons and trichloroacetate ions subsequently leads to an impairment of photosynthesis, most particularly to uncoupling of photosynthetic electron transport. Since progressive aridity as consequence of the climate change observed throughout the world is predicted, a regionally variable marked enhancement of the phytotoxic risk caused by PER emission is anticipated.
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Publication type Article: Journal article
Document type Scientific Article
Keywords Biodegradation; Chloroplasts; Drought stress; Norway spruce; Tetrachloroethene; Trichloroacetic acid
Language english
Publication Year 2007
HGF-reported in Year 2007
ISSN (print) / ISBN 0254-6299
e-ISSN 0254-6299
Journal South African Journal of Botany
Quellenangaben Volume: 73, Issue: 1, Pages: 89-96 Article Number: , Supplement: ,
Publisher Elsevier
Reviewing status Peer reviewed
Institute(s) Research Unit Microbe-Plant Interactions (AMP)
POF-Topic(s) 20402 - Sustainable Plant Production
Research field(s) Environmental Sciences
PSP Element(s) G-504600-002
DOI 10.1016/j.sajb.2006.08.003
Scopus ID 33845495643
Erfassungsdatum 2007-11-13
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