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Functional analysis of a nitrite reductase promoter from birch in transgenic tobacco.

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Nitrate assimilation is a highly regulated process in higher plants, and the regulatory cues governing gene expression in this pathway include both external and internal factors. In birch (Betula pendula Roth) the expression of nitrate reductase (NR) and nitrite reductase (NiR) genes is co-regulated

Overexpression of a MADS-box gene from birch (Betula platyphylla) promotes flowering and enhances chloroplast development in transgenic tobacco.

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In this study, a MADS-box gene (BpMADS), which is an ortholog of AP1 from Arabidopsis, was isolated from birch (Betula platyphylla). Transgenic Arabidopsis containing a BpMADS promoter::GUS construct was produced, which exhibited strong GUS staining in sepal tissues. Ectopic expression of BpMADS

Shortening tobacco life cycle accelerates functional gene identification in genomic research.

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Definitive allocation of function requires the introduction of genetic mutations and analysis of their phenotypic consequences. Novel, rapid and convenient techniques or materials are very important and useful to accelerate gene identification in functional genomics research. Here, over-expression

Three MADS-box genes similar to APETALA1 and FRUITFULL from silver birch (Betula pendula).

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Despite intensive research on genetic regulation of flower development there are still only a few studies on the early phases of this process in perennial plants like trees. The aim of this study has been to identify genes that regulate early stages of inflorescence development in silver birch

Sequence of a cDNA encoding the bi-specific NAD(P)H-nitrate reductase from the tree Betula pendula and identification of conserved protein regions.

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Nitrate reductase (NR) assays revealed a bispecific NAD(P)H-NR (EC 1.6.6.2.) to be the only nitrate-reducing enzyme in leaves of hydroponically grown birches. To obtain the primary structure of the NAD(P)H-NR, leaf poly(A)+ mRNA was used to construct a cDNA library in the lambda gt11 phage.

A Novel R2R3-MYB Transcription Factor BpMYB106 of Birch (Betula platyphylla) Confers Increased Photosynthesis and Growth Rate through Up-regulating Photosynthetic Gene Expression.

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We isolated a R2R3-MYB transcription factor BpMYB106, which regulates photosynthesis in birch (Betula platyphylla Suk.). BpMYB106 mainly expresses in the leaf and shoot tip of birch, and its protein is localized in the nucleus. We further fused isolated a 1588 bp promoter of BpMYB106 and analyzed it

Cadmium accumulation and its effect on the in vitro growth of woody fleabane and mycorrhized white birch.

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The effect of Cd on woody fleabane (Dittrichia viscosa (L.) Greuter) and white birch (Betula celtiberica Rothm. & Vasc.) was examined. Woody fleabane and white birch were grown in vitro in Murashige, T., Skoog, F., [1962. A revised medium for rapid growth and bioassays with tobacco tissue cultures.

The choice of reducing substrate is altered by replacement of an alanine by a proline in the FAD domain of a bispecific NAD(P)H-nitrate reductase from birch.

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Differences in the amino acid sequence between the bispecific NAD(P)H-nitrate reductase of birch (Betula pendula Roth) and the monospecific NADH-nitrate reductases of a variety of other higher plants have been found at the dinucleotide-binding site in the FAD domain. To pinpoint amino acid residues

Characterization of Cherry leafroll virus in Sweet Cherry in Washington State.

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A visual survey in 1998 of a commercial block of 594 sweet cherry trees (Prunus avium) in Yakima County, WA, revealed three trees of cv. Bing growing on Mazzard rootstock that exhibited a progressive decline characterized by a premature drop of yellowed leaves prior to fruit maturity and small, late

Functional characterization of SEPALLATA3 and AGAMOUS orthologues in silver birch.

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The development of flowers is regulated by a complex network of transcriptional activators and repressors, many of which belong to the MADS box gene family. In this study, we describe two MADS box genes of silver birch (Betula pendula Roth), BpMADS1 and BpMADS6, which are similar to SEPALLATA3 and

BpAP1 directly regulates BpDEF to promote male inflorescence formation in Betula platyphylla × B. pendula.

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Flowering is a crucial process for plants that is under complex genetic control. AP1 acts as an organizer and a switch for the transition from vegetative to reproductive growth. In our previous study, we found that overexpression of BpAP1 significantly promoted the formation of male inflorescence in

Rubisco in planta kcat is regulated in balance with photosynthetic electron transport.

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Site turnover rate (k(cat)) of Rubisco was measured in intact leaves of different plants. Potato (Solanum tuberosum L.) and birch (Betula pendula Roth.) leaves were taken from field-growing plants. Sunflower (Helianthus annuus L.), wild type (wt), Rubisco-deficient (-RBC), FNR-deficient (-FNR), and

Expression of the MYB transcription factor gene BplMYB46 affects abiotic stress tolerance and secondary cell wall deposition in Betula platyphylla.

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Plant MYB transcription factors control diverse biological processes, such as differentiation, development and abiotic stress responses. In this study, we characterized BplMYB46, an MYB gene from Betula platyphylla (birch) that is involved in both abiotic stress tolerance and secondary wall

BplMYB46 from Betula platyphylla Can Form Homodimers and Heterodimers and Is Involved in Salt and Osmotic Stresses.

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MYB proteins play important roles in the regulation of plant growth, development, and stress responses. Overexpression of BplMYB46 from Betula platyphylla improved plant salt and osmotic tolerances. In the present study, the interaction of eight avian myeloblastosis viral oncogene

Photosystem II cycle and alternative electron flow in leaves.

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Sunflower (Helianthus annuus L.) and tobacco (Nicotiana tabacum L.) were grown in the laboratory and leaves were taken from field-grown birch trees (Betula pendula Roth). Chlorophyll fluorescence, CO2 uptake and O2 evolution were measured and electron transport rates were calculated, J(C) from the

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