Results 201 to 210 of about 44,949 (260)
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Variation in ozone sensitivity among clones of Betula pendula and Betula pubescens
Environmental Pollution, 1997Forty clones of Betula pendula and 6 clones of Betula pubescens, originating from southern and central Finland, were ranked in order of ozone sensitivity according to visible injuries, growth and leaf senescense under low ozone exposure. The plants were fumigated in natural climatic conditions using an open-air exposure system during two growing ...
E, Pääkkönen +2 more
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Vitrification, a complementary cryopreservation method for Betula pendula Roth
Cryobiology, 2005Cryopreservation--the storage of plant germplasm in liquid nitrogen--provides a modern tool for the conservation of forest genetic resources. It is especially applicable for species in which their micropropagation can be initiated from mature tree buds, e.g., silver birch (Betula pendula Roth), thus enabling the conservation of specific genotypes ...
Ryynänen, L., Aronen, T.
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Do ectomycorrhizas affect boron uptake in Betula pendula?
Canadian Journal of Forest Research, 2014The role of mycorrhizas in the uptake of boron (B) is still poorly known; it has been suggested that ectomycorrhizas (ECM) may either increase B uptake or sequester B in forms unavailable for plants. We examined whether ECM infection affects the B uptake compared with nonmycorrhizal plants and whether two ECM fungal species differ in this respect.
Lehto Tarja, Ruuhola Teija
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Uptake of ozone and modification of lipids in Betula Pendula pollen.
Environmental Pollution, 2018Pollen allergy risk is modified by air pollutants, including ozone, but the chemical modifications induced on pollen grains are poorly understood. Pollen lipidic extract has been shown to act as an adjuvant to the allergenic reaction and therefore, the ...
Chao Zhu +6 more
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Somatic embryogenesis in cell cultures of birch (Betula pendula Roth.)
Plant Cell, Tissue and Organ Culture, 1990Somatic embryogenesis was induced in cell cultures of birch (Betula pendula Roth.) derived from juvenile tissue of seed embryos and from mature leaf tissue. Embryos were formed in liquid and on solidified medium containing 2,4-dichlorophenoxyacetic acid (2,4-D) and 6-furfurylaminopurine (kinetin). Sometimes somatic embryos formed only after transfer to
Kurten, Ulrika +4 more
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Production of polyurethane foams from Betula pendula
2019The production of flexible foams from liquefied bio-wastes is a theme that has been recently approached by various groups of investigators. In this work we have used polyols from liquefied Betula pendula bio-wastes for the production of flexible foams.
L. Cruz-Lopes +5 more
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FORMATION AND STRUCTURE OF LARVAL TUNNELS OF PHYTOBIA BETULAE IN BETULA PENDULA
IAWA Journal, 2001Structural abnormalities in the wood of Betula pendula Roth caused by the larvae of Phytobia betulae Kangas have been examined by light microscopy. The larvae bore through the zone of differentiating xylem from the crown to the base of the tree. The wound callus formed by the tree in response to the damage becomes sclerified and appears as brown ...
V.A. Bonham, J.R. Barnett
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Analysis of the promoter features of BpCUC2 in Betula platyphylla × Betula pendula
Plant Cell, Tissue and Organ Culture (PCTOC), 2017CUC2 encodes a NAC domain transcription factor required for establishing boundaries around plant organ primordia. It is also associated with the initiation of the shoot apical meristem. We cloned a 1497-bp BpCUC2 promoter fragment and constructed a pBpCUC2::LUC vector for birch transgenic.
Chaoyi Liu +4 more
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Lignan glycosides from inner bark of Betula pendula
Phytochemistry, 1995Abstract Four lignan glycosides [lyoniside, nudiposide, (−)-isolariciresinol 3α-O-β- d -xylopyranoside and (2R,3R)-2,3- dihydro-3-hydroxymethyl-7-methoxy-2-(3′-methoxy-4′-α- l -rhamnopyranosyloxyphenyl)-5-benzofuranpropanol ] were isolated from the inner bark of Betula pendula, in addition to (+)-catechin, (+)-catechin 7-O-β- d ...
Elita Šmite +2 more
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Effects of silicon application on Betula pendula seedlings
Canadian Journal of Forest ResearchSilicon (Si) is a beneficial element for many plant species, conferring resistance to drought and herbivory, but its effects on trees are less known. We studied responses of silver birch ( Betula pendula), grown in peat, to liquid Si supplementation (Si concentration 0.65 mmol/L) on (1) growth, (2) water economy, and (3) element accumulation plus (4 ...
Md. Kamrul Hassan +6 more
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