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

Weißflog, L.; Kruger, Gert J.; Forczek, Sándor T.; Lange, Christian; Kotte, Karsten; Pfennigsdorff, Andrea; Rohlenová, Jana; Fuksová, Květoslava; Uhlířová, Hana; Matucha, M.; Schröder, Peter

doi:10.1016/j.sajb.2006.08.003

Cited by 12 publications

(11 citation statements)

References 32 publications

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“…TCA may be formed by photooxidation of C 2 -chlorocarbons as a secondary atmospheric pollutant (Franklin 1994), by biooxidation of C 2 -chlorocarbons within the plant cells (Weissflog et al 2007), or in the soil by enzymatic chlorination of soil organic matter . Atmospheric precursors of TCA are tetrachloroethene (PER) and 1,1,1-trichloroethane.…”

Section: ⎯⎯⎯⎯mentioning

confidence: 99%

“…If we assume only passive transport, TCA is confined in dissociated form to the polar cell compartments, probably mainly the vacuole. A different situation occurs when TCA is formed from its precursors inside the plant chloroplasts (Weissflog et al 2007). C 2 -chlorocarbons are readily absorbed in the cuticle and any membranes of cells containing lipids and wax substances, from where they can be distributed to mesophyll cells or be desorbed again Frank 1986, Figge 1990).…”

Section: ⎯⎯⎯⎯mentioning

confidence: 99%

“…The above authors suggest that TCA transported from the soil accumulated and degraded in vacuoles or in the apoplast, whereas TCA formed directly in the chloroplasts from PER affected enzymes of the photosynthetic apparatus and thus exhibits much stronger phytotoxicity. Weissflog et al (2007) showed that no dichloroacetic acid was formed in the course of PER metabolism. This permitted the conclusion that PER degradation in pine trees under drought stress proceeded only via oxidative transformation and not via GSH induced conjugative biotransformation.…”

Section: ⎯⎯⎯⎯mentioning

confidence: 99%

“…This permitted the conclusion that PER degradation in pine trees under drought stress proceeded only via oxidative transformation and not via GSH induced conjugative biotransformation. Biooxidation of PER in spruce needles has been indicated recently (Weissflog et al 2007). The aim of this work was to clarify if there is a difference in subcellular localization between TCA taken up by the root-xylem-needles pathway and TCA formed directly in needle cells by oxidation in chloroplasts.…”

Section: ⎯⎯⎯⎯mentioning

confidence: 99%

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Trichloroacetic acid of different origin in Norway spruce needles and chloroplasts

Forczek¹,

Schröder²,

Weißflog³

et al. 2008

Biologia plant.

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Trichloroacetic acid (TCA), a secondary atmospheric pollutant, is also formed in forest soil and thus ranked among natural organohalogens. The observed biooxidation of atmospheric tetrachloroethene (PER) to TCA in chloroplasts has led to the investigation of the mode of action of TCA in spruce needles, since TCA is also accumulated in the needles after its rapid uptake from soil by roots. Being phytotoxic, TCA considerably influences conifers by affecting their photosynthetic apparatus. We examined the transport of TCA from soil into chloroplasts in order to compare the effects of TCA on conifers from both sources, i.e. endogenously produced within chloroplasts or taken up by roots. The influence of TCA formed in chloroplasts was found to be much more adverse than that of "soil" TCA.

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Section: ⎯⎯⎯⎯mentioning

confidence: 99%

Section: ⎯⎯⎯⎯mentioning

confidence: 99%

Section: ⎯⎯⎯⎯mentioning

confidence: 99%

Section: ⎯⎯⎯⎯mentioning

confidence: 99%

See 2 more Smart Citations

Trichloroacetic acid of different origin in Norway spruce needles and chloroplasts

Forczek¹,

Schröder²,

Weißflog³

et al. 2008

Biologia plant.

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“…They thereby aggravate necrosis caused by natural aging and accelerate senescence (Renault 2005, Weissflog et al 2007). Road salting can have a lethal effect on smaller trees (Kayama et al 2003).…”

mentioning

confidence: 99%

Influence of road salting on the adjacent Norway spruce (Picea abies) forest

Forczek¹,

Benada²,

Kofroňová³

et al. 2011

PLANT SOIL ENVIRON

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Winter deicing and traffic spreads salt to road-adjacent Norway spruce trees in the form of spraying and salt slops. Our use of Na 36 Cl revealed roots as the main pathway of salt uptake. One-shot application of a concentrated Na 36 Cl solution to spruce saplings by both irrigation and spraying causes macroscopic damage to the needles and affects the needle phyllosphere. Irrigation affects the trees more than spraying because Cl -uptake through roots is faster and eventually leads to higher chloride content in the plant. Along with the root-needle route, spray-deposited chloride from the needles is re-transported back into the soil and again taken up by roots to needles.

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Volatile Profile of Bee Pollens: Optimization of Sampling Conditions for Aroma Analysis, Identification of Potential Floral Markers, and Establishment of the Flavor Wheel

Csóka,

Végh,

Sipos

2024

Food Science & Nutrition

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The volatile profile of bee pollen samples from Central and Eastern Europe was investigated by headspace solid phase microextraction (HS‐SPME) combined with gas chromatography–mass spectrometry‐olfactometry (GC–MS‐O). Sampling conditions were optimized for the extraction of volatiles. Pollen odorants were extracted with six different fiber coatings, five various extraction times, three diverse extraction temperatures and three differing desorption times. The most effective combination was the application of divinylbenzene/carboxen/polydimethylsiloxane (DVB/CAR/PDMS) fiber coating used at 60°C for 30 min for extraction and 1 min for desorption. The optimized method was applied to investigate the volatile profile of 14 pollen samples (three rapeseed, musk thistle, rock‐rose, traveler's joy, dropwort, honey locust, sunflower, red poppy, phacelia, sweet cherry, wild blackberry, and dandelion). The volatile profiles of bee pollens were different and were crucially depended on botanical origin. The aroma activity of the samples was generated by 31.0%–48.3% of total volatiles. The number of the identified odorants were between 75 and 101 in the pollen samples by GC–MS, of which 26–42 were aroma‐active. The volatile organic compounds (VOCs) were classified into 13 different chemical classes. In most pollen, fatty acids were the predominant volatiles (14.87%–50.58%), while in some samples esters were the most abundant odorants (4.09%–45.46%). Panelists confirmed the presence of six main sensory characteristics described as “green/sour”, “fruity”, “spicy/herbal”, “earthy/mushroom”, “sweet/baked/caramel/honey”, and “floral” compounds. These results establish the flavor wheel suitable for the comprehensive sensory description of pollen pellets from individual plant species. All samples contained characteristic odorants that may help in their botanical identification.

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

Cited by 12 publications

References 32 publications

Trichloroacetic acid of different origin in Norway spruce needles and chloroplasts

Trichloroacetic acid of different origin in Norway spruce needles and chloroplasts

Influence of road salting on the adjacent Norway spruce (Picea abies) forest

Volatile Profile of Bee Pollens: Optimization of Sampling Conditions for Aroma Analysis, Identification of Potential Floral Markers, and Establishment of the Flavor Wheel

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