Results 141 to 150 of about 1,867 (169)

Localization of the ellagitannins in the tissues of Quercus robur and Quercus petraea woods

Phytochemistry, 1994
Abstract The heartwoods of a pedunculate oak and a sessile oak were each dissected into four fractions according to tissue type. The ellagitannins roburins A–E, grandinin, castalagin, and vescalagin in each fraction were determined by HPLC. The ellagitannin distributions in the wood of the two species were found to be identical. Both the longitudinal
Masson, Gérard, Puech, J.L., Moutounet, Michel   +2 more
openaire   +2 more sources

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
openaire   +1 more source

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
openaire   +1 more source

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
openaire   +2 more sources

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
openaire   +2 more sources

Endophytische Pilze in Blättern und Zweigen von Quercus petraea

European Journal of Forest Pathology, 1993
Abstract Endophytic fungi in leaves and twigs of Quercus petraea. Surface sterilized leaf and twig samples taken in 1989 from sessile oak (Quercus petraea) in Austria yielded host‐specific as well as unspecific ubiquistic endophytes. In leaves, Aureobasidium apocryptum and Apiognomonia quercina were the most frequent taxa, while Colpoma quercinum was ...
E. Von Halmschlager, H. Butin, E. Donaubauer   +2 more
openaire   +1 more source

Quercus petraea in België

1957
Naar aanleiding van het artikel over Quercus petraea in het Corr. bl. no. 4 zend ik u hierbij een kopie van de Belgische verspreidingskaart, omdat daar m.i. wel een en ander uit af te leiden is, dat ook Nederland aanbelangt: 1. Bij bet massale verspreidingsgebied ten Z. van de lijn Samber-Maas (de leemten daarin duiden eer op onvoldoende prospectie dan
openaire   +1 more source

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.
openaire   +1 more source

Quercus petraea (Matt.) Liebl. in Nederland

1957
In de Nederlandse flora’s wordt de Wintereik, Q. petraea, geregeld genoemd. Van Hall geeft in zijn “Flora voor Noord-Nederland” (1825) vier vindplaatsen, nl. het Haagse Bos, de Haarlemmerhout, buiten Utrecht en bij Leiden. In de “Flora Frisica” (1840) worden de bossen van Oldeberkoop genoemd en in de “Flora Noviomagus” (1848) de bossen van Ubbergen en ...
openaire   +1 more source

Proanthocyanidins fromQuercus petraeaBark

Planta Medica, 1991
E. Pallenbach, E. Scholz, M. König, D. Hunkler, H. Rimpler   +4 more
openaire   +1 more source