pinus/necrotisch

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Salt spray differentially affects water status, necrosis, and growth in coastal sandplain heathland species.

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Sandplain heathlands are disturbance-dependent plant communities that occur infrequently in coastal areas of the northeastern United States. We hypothesize that salt spray plays a role in maintaining the composition of the heathland community by excluding salt-intolerant species close to the ocean.

Fungi associated with the southern pine beetle: avoidance of induced defense response in loblolly pine.

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Loblolly pines (Pinus taeda) are rapidly killed by colonizing southern pine beetle (Dendroctonus frontalis). The female beetles carry two species of fungi (Ceratocystis minor var. barrasii and an unnamed basidiomycete) within a mycangium. The insects are also frequently associated with a

Pycnogenol inhibits immunoglobulin E-mediated allergic response in mast cells.

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IgE-dependent mast cell activation is known to be associated with the allergic diseases. Pycnogenol (PYC) is a standardized extract of the bark of French maritime pine containing bioflavonoids with a potent antioxidant activity. The antiallergic activity of PYC was evaluated using both in vivo and

Jack pine growth and elemental composition are affected by saline tailings water.

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In the processing of oil sands from Alberta's Athabasca formation, large quantities of alkaline, saline tailings and associated process-affected waters are produced. These waters may have a negative effect on plants used in reclamation of mined areas in this region of the northern boreal forest. In

Gas exchange and growth responses of ectomycorrhizal Picea mariana, Picea glauca, and Pinus banksiana seedlings to NaCl and Na2SO4.

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Black spruce (PICEA MARIANA), white spruce (PICEA GLAUCA), and jack pine (PINUS BANKSIANA) seedlings were inoculated with HEBELOMA CRUSTULINIFORME or LACCARIA BICOLOR and subjected to NaCl and Na (2)SO (4) treatments. The effects of ectomycorrhizas on salt uptake, growth, gas exchange, and needle

Relationship of Bursaphelenchus xylophilus Population Density to Mortality of Pinus sylvestris.

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Seven-month-old Scots pine seedlings were inoculated with water or culture filtrate (controls), with 10,000, or 20,000 (experiment 1), and with 2,500 (experiment 2) Bursaphelenchus xylophilus B.C. isolate nematodes and maintained under defined experimental conditions. Controls did not develop pine

Assessing the critical level of SO2 for Scots pine in situ.

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A field survey was performed in eastern Finland, where measured ambient SO2 concentrations were 1.4-3.8 microg m(-3) a(-1) and bulk S deposition 0.17-0.32 g m(-2) a(-1) in 1991-1993. The accumulation of sulphur (S) in needles of Scots pine (Pinus sylvestris L.) was studied with XRF, IC and FESEM

Sphaeropsis sapinea Morphotypes Differ in Aggressiveness, but Both Infect Nonwounded Red or Jack Pines.

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Two morphotypes of Sphaeropsis sapinea, designated A and B, are recognized in the north central United States. Nonwounded seedlings of red (Pinus resinosa) and jack pine (P. banksiana) were inoculated with conidial suspensions of isolates of each morphotype obtained from hosts in Michigan,

Anti-asthmatic effects of volatile organic compounds from Chamaecyparis obtusa, Pinus densiflora, Pinus koraiensis, or Larix kaempferi wood panels.

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Asthma is a common chronic inflammatory disease in which lung airways narrow and produce extra mucus. Numerous medications, such as steroids, are used to prevent or control asthmatic symptoms, but side effects are associated with those medications. There are reports of anti-inflammatory,

Evidence of Cytoplasmic Inheritance of Virulence in Cronartium ribicola to Major Gene Resistance in Sugar Pine.

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ABSTRACT Tests for Mendelian segregation of virulence and avirulence in Cronartium ribicola, causal agent of white pine blister rust, to a major gene (R) for resistance in sugar pine were made using haploid basidiospore progenies from single diploid telia as inoculum on resistant genotypes. The

Response of living tissues of Pinus sylvestris to the saprotrophic biocontrol fungus Phlebiopsis gigantea.

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The saprotrophic fungus Phlebiopsis gigantea has been used for several years as a biocontrol agent against the conifer pathogen Heterobasidion annosum. Although the effectiveness of P. gigantea in biocontrol has been shown empirically, the long-term effect on living conifer trees as well as the

Mycosphaerella dearnessii, a Needle-cast Pathogen on Mountain Pine (Pinus mugo) in Italy.

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The pathogen Mycosphaerella dearnessii Barr. (syn. Scirrhia acicola; anamorph Lecanosticta acicola), the causal agent of brown spot needle blight, was observed on Pinus mugo in the Botanical Garden in Gardone (Brescia), on the western side of Garda Lake in northeastern Italy. Symptoms were first

Protective mechanisms of pycnogenol in ethanol-insulted cerebellar granule cells.

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Pycnogenol (PYC), a patented combination of bioflavonoids extracted from the bark of French maritime pine (Pinus maritima), inhibits apoptosis and necrosis of developing neurons exposed acutely to ethanol (EtOH). The present study shows that the protective mechanisms of PYC in EtOH-exposed postnatal

Modulating effects of pycnogenol® on oxidative stress and DNA damage induced by sepsis in rats.

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The aim of this study was to evaluate the protective effects of Pycnogenol® (Pyc), a complex plant extract from the bark of French maritime pine, on oxidative stress parameters (superoxide dismutase (SOD), and glutathione peroxidase (GPx) activities and total glutathione (GSH) and malondialdehyde

An Ornamental Swiss Stone Pine (Pinus cembra) in Wisconsin is a Host of the Shoot Blight Pathogen Diplodia pinea.

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Swiss stone pine (Pinus cembra) is a slow-growing, hardy tree native to high-mountain regions of Europe from the Alps to the Carpathians. It also is planted as an ornamental in North America. Shoot blight and branch dieback were observed in the fall of 2008 on a single, 25- to 30-year-old Swiss

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