Birgit Arnholdt-Schmitt

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Olive (Olea europaea L.) trees are mainly propagated by adventitious rooting of semi-hardwood cuttings. However, efficient commercial propagation of valuable olive tree cultivars or landraces by semi-hardwood cuttings can often be restricted by a low rooting capacity. We hypothesize that root induction is a plant cell reaction linked to oxidative stress and(More)
Investigations were performed on growth phase-dependent EcoRII site-specific DNA methylation of the carrot genome during primary culture to elucidate physiological aspects of genome DNA variability in tissue culture. While DNA methylation of the root cambium and the secondary phloem and petioles of carrot leaves were strikingly different, the methylation(More)
Abbreviations: 2,4-D: 2,4-dichlorophenoxyacetic acid ABA: abscisic acid ABI3: ABI gene family member 3 ANP1: Arabidopsis NPK1-like protein kinase AP: ascorbate peroxidase AOX: alternative oxidase DNA: deoxyribonucleic acid Fe-EDTA: ferric ethylenediaminetetraacetic acid M: molar concentration MAPK: mitogen-activated protein kinase NO: Nitric oxide PGRs:(More)
Functional markers for stress tolerance can be used in plant breeding to identify genotypes with high yield stabilities under various conditions. Thus, a good marker should show a strong correlation with favourable adaptive plant behaviour. The efficient reprogramming of target cells for yield determination is currently considered to be the most important(More)
Rapid genomic DNA variation due to methylation and copy number alteration was observed in carrot root explants 6 h after inoculation and during a 36-h period of exponential callus growth. De novo methylation and amplification of restricted BspNI fragments of low molecular weight occurred before cell cycle activation and should, therefore, be independent of(More)
Systematic investigations on the occurrence of differential DNA replication in carrot cultures, expressed at the total genome level, were performed. The genome of Daucus carota L. could be characterized by a pattern of repetitive BstNI fragments that was independent of tissue specificity or cultivar differences. Characterization of the genomic DNA of the(More)
Alternative oxidase (Aox) has been proposed as a functional marker for breeding stress tolerant plant varieties. This requires presence of polymorphic Aox allele sequences in plants that affect plant phenotype in a recognizable way. In this review, we examine the hypothesis that organization of genomic Aox sequences and gene expression patterns are highly(More)
A classification scheme based on protein phylogenies and sequence harmony method was used to clarify the taxonomic distribution and evolutionary history of the alternative oxidase (AOX) in angiosperms. A large data set analyses showed that AOX1 and AOX2 subfamilies were distributed into 4 phylogenetic clades: AOX1a-c/1e, AOX1d, AOX2a-c and AOX2d. High(More)
Recent interest in breeding strategies for Hypericum perforatum L. requires a better understanding of the floral biology of this medicinal plant. The aim of the present study was to check, whether RAPD fingerprinting may be a useful tool for research on the mode of reproduction of this species. Progenies from three defined single plants of two accessions,(More)
Stress adaptation in crops is an important and timely topic in basic and applied biology. Interest in the issue is ambiguous. On the one hand, it is fascinating to understand interaction between plants and environment. On the other hand and in view of the needs of human life, we want to create crop plants that are able to confront successfully unfavorable(More)