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Embryogenesis in Quercus petraea and Fagus sylvatica

Journal of Plant Physiology, 1988
Summary Anthers of Quercus petraea and Fagus sylvatica were excised from flower buds in various stages of development and cultivated on media with different cytokinine and auxin levels. After 2 months of cultivation, embryogenic calli in Quercus and one embryo in Fagus developed in anthers in the one nucleus stage of the pollengrain during the ...
exaly   +2 more sources

Adaptive and plastic responses ofQuercus petraeapopulations to climate across Europe [PDF]

open access: yesGlobal Change Biology, 2017
Cuauhtémoc Sáenz-Romero   +2 more
exaly   +2 more sources

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   +2 more
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Proanthocyanidins fromQuercus petraeaBark

Planta Medica, 1993
Flavanols and oligomeric proantho-cyanidins were isolated from oak bark ( QUERCUS PETRAEA) and characterized by acid hydrolysis, gel permeation chromatography, haemanalysis, and complete as well as partial thiolytic degradation. The proantho-cyanidins had an average polymerization degree of 6.1 and a procyanidin: prodelphinidin ratio of 6:4.
Pallenbach, Ernst   +3 more
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The Growth of Seedlings of Quercus Petraea

The Journal of Ecology, 1960
Acorns were planted in a variety of soils in each of three cages (1.3 m high x 3-7 m long x 2*4 m wide) constructed to reproduce artificially different canopy densities. The acorns were collected in the grounds of Wray Castle near Lake Windermere in November of 1955 from under a group of four mature trees of Q.
J. D. Ovington, C. MacRae
openaire   +1 more source

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