Results 171 to 180 of about 5,022 (205)

Ellagitannins and Complex Tannins from Quercus petraea Bark

Journal of Natural Products, 1994
The ellagitannins 2,3-(S)-hexahydroxydiphenoyl-glucose, pedunculagin, vescalagin, and castalagin; the flavanoellagitannins acutissimin A, acutissimin B, eugenigrandin A, guajavin B, and stenophyllanin C; and the procyanidinoellagitannin mongolicanin have been isolated from the bark of Quercus petraea.
König, Martin, Scholz, Eberhard, Hartmann, Rudolf, Lehmann, Wolf-Dieter, Rimpler, Horst   +4 more
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Development of microsatellite loci from Quercus robur and Quercus petraea

1996
The importance of genetic polymorphism detected by microsatellite sequences is now well established in mammalian and recently also in some plant genomes. In this study a size selected genomic library from Quercus petraea and Q. robur, the most common oak species in Europe, were screened for GA-microsatellite sequences and the resulting loci were ...
Steikellner, H., Fluch, S., Turetschek, E., Streiff, Réjane, Kremer, Antoine, Burg, K., Glössl, J.   +6 more
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Response of Quercus petraea seedlings to nitrogen fertilization

Forest Ecology and Management, 2001
In view of increasing concern about long-term effects of N deposition on forest ecosystem, decline of oak stands in many central European countries, and poor documentation of nutrient budgets of oak stands, a pot experiment was performed on N-fertilized oak seedlings (Quercus petraea Liebl.) to study impact on biomass, morphology and nutrition ...
Torsten W Berger, Gerhard Glatzel
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Ontogeny of the proventitious epicormic buds in Quercus petraea.

Trees, 1999
In the present work, we described the fate of proventitious epicormic buds on the trunks of 40-year-old Quercus petraea trees and in parallel the vascular trace they produced in the wood. Our results show that small and large individual epicormic buds can survive as buds for 40 years and that both are composed of a terminal meristem and scales ...
F. Fontaine, E. Kiefer, C. Clément, M. Burrus, J. L. Druelle   +4 more
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Stomatal index response of Quercus robur and Quercus petraea to the anthropogenic atmospheric CO2 increase

Plant Ecology, 2005
The inverse relationship between numbers of stomata (stomatal frequency) on tree leaves and ambient CO2 concentration is increasingly applied for reconstructing past atmospheric CO2 levels. The abundance of leaf remains of Quercus robur in Holocene peat and lake deposits in Europe makes this species potentially suitable for high-resolution stomatal ...
van Hoof, T.B., Kürschner, W.M., Wagner, F., Visscher, H.   +3 more
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Quercus petraea Liebl.

2012
Digitale Pflanzenbilder: Sammlung Dietmar ...
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Development of structural root architecture and allometry of Quercus petraea

Canadian Journal of Forest Research, 1999
Root growth direction, radial distribution of roots, and biomass partitioning within the root system were examined on fifty-five 20 and 28-year-old sessile oak (Quercus petraea (Matt.) Liebl.) trees. The root systems were spatially subdivided into three concentric cylinders.
Drexhage, M., Chauvière, M., Colin, F., Nielsen, C.N.N.   +3 more
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Chalara angustata sp. nov. from roots of Quercus petraea and Quercus robur

Mycological Research, 1996
A new species of the hyphomycete genus Chalara is described. This fungus was isolated several times from roots of healthy and declining oaks (Quercus petraea and Q. robur). It differs from previously described species of Chalara by its septate conidia, the morphology of the phialophores and by colony characteristics.
T. Kowalski, E. Halmschlager
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Insoluble ellagitannins in Castanea sativa and Quercus petraea woods

Phytochemistry, 1991
Sapwood and heartwood samples of sweet chestnut (Castanea sativa) and sessile oak (Quercus petraea) were extracted with aqueous acetone. Ellagitannins were estimated in both extracts and extraction residues, by the Folin-Ciocalteu method and by determination of ellagic acid formed after acid degradation.
Peng, Shuang, Scalbert, Augustin, Monties, Bernard   +2 more
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Hybridization and speciation dynamic of Quercus petraea and Quercus robur

2012
Quercus petraea and Q. robur are two interfertile sympatric species. They occupy distinct stages during forest succession and constitute therefore good models for ecological speciation studies. Despite their differences, they often grow together in mixed stands, allowing the study of their intra- and interspecific reproductive system.
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