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000053637 0247_ $$2DOI$$a10.1080/15226510600846780
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000053637 084__ $$2WoS$$aEnvironmental Sciences
000053637 1001_ $$0P:(DE-HGF)0$$aFerrieri, A.P.$$b0
000053637 245__ $$aStimulating natural defenses in poplar clones (OP-367) increases plant metabolism of carbon tetrachloride
000053637 260__ $$aPhiladelphia, Pa.$$bTaylor & Francis$$c2006
000053637 300__ $$a233 - 243
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000053637 440_0 $$016082$$aInternational Journal of Phytoremediation$$v8$$x1522-6514
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000053637 520__ $$aGroundwater contamination by carbon tetrachloride (CCl4) presents a health risk as a potential carcinogen and pollutant that is capable of depleting the ozone layer. Although use of poplar trees in a phytoremediation capacity has proven to be cost effective for cleaning contaminated sites, minimizing leaf emission of volatile contaminants remains a pressing issue. We hypothesized that recently fixed carbon plays a key role in CCl4 metabolism in planta yielding nonvolatile trichloroacetic acid (TCA) and that the extent of this metabolism can be altered by heightening plant defenses. Labeling intact leaves with (11)CO2 (t 1/2 20.4 m) can test this hypothesis, because the extremely short half-life of the tracer reflects only those processes involving recently fixed carbon. Using radio-HPLC analysis, we observed [(11)C]TCA from leaf extract from poplar clones (OP-367) whose roots were exposed to a saturated solution of CCl4 (520 ppm). Autoradiography of [(11)C]photosynthate showed increased leaf export and partitioning to the apex within 24 h of CCl4 exposure, suggesting that changes in plant metabolism and partitioning of recently fixed carbon occur rapidly. Additionally, leaf CCl4 emissions were highest in the morning, when carbon pools are low, suggesting a link between contaminant metabolism and leaf carbon utilization. Further, treatment with methyljasmonate, a plant hormone implicated in defense signal transduction, reduced leaf CCl4 emissions two-fold due to the increased formation of TCA.
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000053637 650_2 $$2MeSH$$aAcetic Acids: pharmacology
000053637 650_2 $$2MeSH$$aCarbon Radioisotopes: analysis
000053637 650_2 $$2MeSH$$aCarbon Tetrachloride: metabolism
000053637 650_2 $$2MeSH$$aChromatography, High Pressure Liquid
000053637 650_2 $$2MeSH$$aCyclopentanes: pharmacology
000053637 650_2 $$2MeSH$$aOxylipins
000053637 650_2 $$2MeSH$$aPhotosynthesis: drug effects
000053637 650_2 $$2MeSH$$aPlant Growth Regulators: pharmacology
000053637 650_2 $$2MeSH$$aPlant Leaves: metabolism
000053637 650_2 $$2MeSH$$aPopulus: drug effects
000053637 650_2 $$2MeSH$$aPopulus: metabolism
000053637 650_2 $$2MeSH$$aTrichloroacetic Acid: metabolism
000053637 650_7 $$00$$2NLM Chemicals$$aAcetic Acids
000053637 650_7 $$00$$2NLM Chemicals$$aCarbon Radioisotopes
000053637 650_7 $$00$$2NLM Chemicals$$aCyclopentanes
000053637 650_7 $$00$$2NLM Chemicals$$aOxylipins
000053637 650_7 $$00$$2NLM Chemicals$$aPlant Growth Regulators
000053637 650_7 $$01211-29-6$$2NLM Chemicals$$amethyl jasmonate
000053637 650_7 $$056-23-5$$2NLM Chemicals$$aCarbon Tetrachloride
000053637 650_7 $$076-03-9$$2NLM Chemicals$$aTrichloroacetic Acid
000053637 650_7 $$2WoSType$$aJ
000053637 65320 $$2Author$$amethyl jasmonate
000053637 65320 $$2Author$$acarbon-11
000053637 65320 $$2Author$$aphytoremediation
000053637 65320 $$2Author$$aplant defenses
000053637 65320 $$2Author$$acarbon tetrachloride
000053637 65320 $$2Author$$ametabolism
000053637 65320 $$2Author$$atrichloroacetic acid
000053637 7001_ $$0P:(DE-Juel1)VDB28478$$aThorpe, M. R.$$b1$$uFZJ
000053637 7001_ $$0P:(DE-HGF)0$$aFerrieri, R. A.$$b2
000053637 773__ $$0PERI:(DE-600)2094255-2$$a10.1080/15226510600846780$$gVol. 8, p. 233 - 243$$p233 - 243$$q8<233 - 243$$tInternational journal of phytoremediation$$v8$$x1522-6514$$y2006
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