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Volcanic mercury in Pinus canariensis.

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Mercury (Hg) is a toxic element that is emitted to the atmosphere by both human activities and natural processes. Volcanic emissions are considered a natural source of mercury in the environment. In some cases, tree ring records taken close to volcanoes and their relation to volcanic activity over

Molecular characterization of a glutathione transferase from Pinus tabulaeformis (Pinaceae).

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Glutathione transferases (GSTs) play important roles in stress tolerance and detoxification metabolism in plants. To date, studies on GSTs in higher plants have focused largely on agricultural plants. In contrast, there is virtually no information on the molecular characteristics of GSTs in

Molecular characterization of zeta class glutathione S-transferases from Pinus brutia Ten.

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Glutathione transferases (GSTs; EC 2.5.1.18) play important roles in stress tolerance and metabolic detoxification in plants.In higher plants, studies on GSTs have focussed largely on agricultural plants. There is restricted information about molecular characterization of GSTs in gymnosperms. To

Removal of nitrogen during needle senescence in Scots pine (Pinus sylvestris L.).

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The concentrations of arginine, protein and total nitrogen (N) and the abundance of15N were measured in 3-and 4-year-old needles of Scots pine trees fertilized with either 0 (C), 36 (N1) or 73 (N2) kg N ha-1 year-1 annually for 22 years (average doses of N). Remaining green needles and needles that

Association between herbivore stress and glutathione S-transferase expression in Pinus brutia Ten.

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Plants have developed mechanisms to defend themselves against many factors including biotic stress such as herbivores and pathogens. Glutathione S-transferase (GST) is a glutathione-dependent detoxifying enzyme and plays critical roles in stress tolerance and detoxification metabolism in plants.

Characterization of the Pinus massoniana transcriptional response to Bursaphelenchus xylophilus infection using suppression subtractive hybridization.

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Pine wilt disease (PWD) caused by pine wood nematode (PWN), Bursaphelenchus xylophilus, is the most destructive diseases of pine and poses a threat of serious economic losses worldwide. Although several of the mechanisms involved in disease progression have been discovered, the molecular response of

Effects of trichloroacetic acid on the nitrogen metabolism of Pinus sylvestris--a 13C/15N tracer study.

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Trichloroacetic acid (TCA) can be found in various environmental compartments like air, rain and plants all over the world. It is assumed that TCA is an atmospheric degradation product of volatile chloroorganic hydrocarbons. The herbicide effect of TCA in higher concentrations is well known, but not

Wood and bark of Pinus halepensis as archives of heavy metal pollution in the Mediterranean Region.

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Natural levels of heavy metals (HM) have increased during the industrial era to the point of posing a serious threat to the environment. The use of tree species to record contamination is a well-known practice. The objective of the study was to compare HM levels under different pollution conditions:

Catalytic properties of glutathione-binding residues in a tau class glutathione transferase (PtGSTU1) from Pinus tabulaeformis.

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Glutathione transferases (GSTs) play important roles in stress tolerance and detoxification in plants. However, there is extremely little information on the molecular characteristics of GSTs in gymnosperms. In a previous study, we cloned a tau class GST (PtGSTU1) from a gymnosperm (Pinus

Seasonal variation of organogenetic activity and reserves allocation in the shoot apex of Pinus pinaster Ait.

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OBJECTIVE To understand better the basic growth characteristics of pines and the fundamental properties of the shoot apical meristem (SAM), variations within the shoot apex of buds were studied. METHODS A detailed structural comparison of meristem dimensions, organogenetic activity, and the presence

Yeast diversity associated with invasive Dendroctonus valens killing Pinus tabuliformis in China using culturing and molecular methods.

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Bark beetle-associated yeasts are much less studied than filamentous fungi, yet they are also considered to play important roles in beetle nutrition, detoxification, and chemical communication. The red turpentine beetle, Dendroctonus valens, an invasive bark beetle introduced from North America,

Does anthracene affect microbial activities and organic matter decomposition? A comparative study in Pinus halepensis litters from Mediterranean coastal and inland areas.

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The widespread concern about pollution caused by Polycyclic Aromatic Hydrocarbons (PAHs) raises the question of how they affect soil microbial communities which are potentially involved in the transformation of these pollutants. Using microcosms, we describe the effect of anthracene, a model PAH, on

Seasonal patterns of ascorbate in the needles of Scots Pine (Pinus sylvestris L.) trees: correlation analyses with atmospheric O3 and NO2 gas mixing ratios and meteorological parameters.

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In the present field study the role of ascorbate in scavenging the harmful atmospheric trace gases O3 and NO2 was examined. For this purpose ascorbate contents were determined in needles of adult Scots pine trees (Pinus sylvestris L.) during three consecutive years. Ascorbate contents were

Detoxification and amelioration of heavy-metal contaminated forest soils by means of liming and fertilisation.

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Four experiments were established in 1992 in Scots pine stands (Pinus sylvestris L.) on relatively infertile sites at distances of 0.5, 2, 4 and 8 km to the south-east of the Cu-Ni smelter at Harjavalta, south-west Finland, in order to investigate the effects of liming, correction fertiliser and

Biotransformation of the fungal toxin fomannoxin by conifer cell cultures.

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Fomannoxin [(+/-)-5-Formyl-2-isopropenyl-2,3-dihydrobenzofurane] is a phytotoxic secondary metabolite, which is produced by the forest pathogenic basidiomycete Heterobasidion annosum during the infection process. Fomannoxin shows growth-inhibiting effects on callus and suspension cultures of conifer

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