Roland Schubert

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Stilbene synthase (STS) is an enzyme involved in the biosynthesis of stilbenes, which are synthesized in various plants in response to pathogen attack, UV irradiation or exposure to ozone. We describe analysis of an ozone inducible STS transcript and its corresponding promoter (Vst1), combined with the β-glucuronidase (GUS) reporter gene. A single ozone(More)
Controlled inoculation of spruce seedling needle crowns and of shoots of 4-year-old spruce trees by Sirococcus conigenus led to disease symptoms (discoloration and necrosis) and to the induction of phenolic metabolites. Even upon complete infection, as proved by re-isolation of the pathogen from inoculated seedlings, only 40% of the plants developed visible(More)
The use of Integrated Testing Strategies (ITS) in toxicological hazard identification and characterisation is becoming increasingly common as a method for enabling the integration of diverse types of toxicology data. At present, there are no existing procedures and guidelines for the construction and validation of ITS, so a joint EPAA WG5-ECVAM workshop was(More)
We studied the expression of the oat globulin gene asglo5 in developing transgenic tobacco seeds. The asglo5 gene promoter directed transcription in the endosperm as well as in the provascular tissue, the presumptive root tip and the shoot apical meristem of the embryo as revealed by GUS reporter gene constructs and in situ hybridization. However,(More)
We have characterized several Vicia faba genes encoding methionine residue-free group B subunits of the 11S or legumin storage proteins. The respective gene subfamily consists of 10 to 15 members, six of them having been studied by DNA sequence analysis. Four functional genes (LeB2, LeB4, LeB6, LeB7) are highly homologous in their coding region and 0.3 kb(More)
Separation of inspiratory, mixed expired and alveolar air is indispensable for reliable analysis of VOC breath biomarkers. Time resolution of direct mass spectrometers often is not sufficient to reliably resolve the phases of a breathing cycle. To realise fast on-line breath monitoring by means of direct MS utilising low-fragmentation soft ionisation, a(More)
The effect of a stepwise decrease inPaCO2 from 3.9–1.6 kPa on rCBF, rCMRO2, tissuePO2 and concentrations of glucose, lactate, pyruvate, ATP, ADP, AMP and phosphocreatine in the brain cortex was studied in cats lightly anaesthetized with sodium pentobarbital. 1. Moderate lowering ofPaCO2 to 2.5 kPa induced in all animals a homogeneous decrease of rCBF in(More)
Volatile breath constituents such as acetone and ammonia have been linked to dextrose, fat, and protein metabolism. Non-invasive breath analysis, therefore, may be used for metabolic monitoring, identification of fuel sources actually used for energy production and determination of the anaerobic threshold (AT). This study was intended to assess correlations(More)
Translation initiation plays a critical role in the regulation of cell growth and tumorigenesis. We report here that inhibiting translation initiation through induction of eIF2α phosphorylation by small-molecular-weight compounds restricts the availability of the eIF2.GTP.Met-tRNAi ternary complex and abrogates the proliferation of cancer cells in vitro and(More)
Recently, a novel group of fungal peroxidases, known as the aromatic peroxygenases (APO), has been discovered. Members of these extracellular biocatalysts produced by agaric basidiomycetes such as Agrocybe aegerita or Coprinellus radians catalyze reactions—for example, the peroxygenation of naphthalene, toluene, dibenzothiophene, or pyridine—which are(More)