A5064718004- Plant Molecular Biology Research
- Plant Stress Responses and Tolerance
- Plant Reproductive Biology
- Plant-Microbe Interactions and Immunity
- Photosynthetic Processes and Mechanisms
- Light effects on plants
- Postharvest Quality and Shelf Life Management
- Plant Gene Expression Analysis
- Plant nutrient uptake and metabolism
- Plant Physiology and Cultivation Studies
- Plant Virus Research Studies
- Polysaccharides and Plant Cell Walls
- Plant responses to water stress
University of Tübingen
2007-2024
University of Freiburg
2001
The Arabidopsis thaliana response regulator 4, expressed in to phytochrome B action, specifically interacts with the extreme amino-terminus of photoreceptor. 4 stabilizes active Pfr form yeast and planta, thus elevates level photoreceptor vivo. Accordingly, transgenic plants overexpressing display hypersensitivity red light but not other wavelengths. We propose that acts as an output element a two-component system modulates signaling on
BackgroundStomatal guard cells monitor and respond to environmental endogenous signals such that the stomatal aperture is continually optimised for water use efficiency. A key signalling molecule produced in response plant hormones, light, carbon dioxide pathogen-derived hydrogen peroxide (H2O2). The mechanisms by which H2O2 integrates multiple via specific pathways leading closure not known.Principal FindingsHere, we identify a pathway H2O2, derived from stimuli, sensed transduced effect...
Two principal growth regulators, cytokinins and ethylene, are known to interact in the regulation of plant growth. However, information about underlying molecular mechanism positional specificity cytokinin/ethylene crosstalk control root is scarce. We have identified spatial cytokinin-regulated elongation apical meristem (RAM) size, both which we demonstrate be dependent on ethylene biosynthesis. Upregulation cytokinin biosynthetic gene ISOPENTENYLTRANSFERASE (IPT) proximal peripheral...
The A-type response regulator ARR4 is an element in the two-component signalling network of Arabidopsis. interacts with N-terminus red/far-red light photoreceptor phytochrome B (phyB) and functions as a modulator photomorphogenesis. In concert other regulators, also participates modulation cytokinin pathway. Here evidence presented that directly modulates activity state phyB planta, not only under inductive but extended irradiation red light. Mutation phosphorylatable aspartate to asparagine...
Summary In higher plants, the two‐component system (TCS) is a signaling mechanism based on His‐to‐Asp phosphorelay. The Arabidopsis TCS involves three different types of proteins, namely histidine kinases (AHKs), phosphotransfer proteins (AHPs) and response regulators (ARRs). ARRs comprise families, A, B C types, according to their protein structure. While some members B‐type family have been studied extensively reported act as DNA‐binding transcriptional regulators, very limited information...
To optimize water use efficiency, plants regulate stomatal closure through a complex signaling process. Hydrogen peroxide (H2O2) is produced in response to several environmental stimuli, and has been identified as key second messenger involved the regulation of aperture. The Arabidopsis histidine kinase 5 (AHK5) shown H2O2 other stimuli that depend on H2O2. AHK5 member two-component system (TCS) Arabidopsis. plant TCS comprises three different protein types: hybrid kinases (HKs),...
In plants, several developmental processes are co-coordinated by cytokinins via phosphorylation dependent of the Two-Component System (TCS). An outstanding challenge is to track phosphorelay flow from cytokinin perception its molecular outputs, which gene activation plays a major role. To address this issue, kinetic-based reporter system was expounded TCS activity in vivo that can distinguish between basal and effects overexpressed members. The be positively activated inhibited...
Abstract The two principal growth regulators cytokinins and ethylene are known to interact in the regulation of plant growth. However, information about underlying molecular mechanism positional specificity cytokinin/ethylene crosstalk root control is scarce. We have identified spatial cytokinin-regulated elongation apical meristem (RAM) size, both which we demonstrate be biosynthesis-dependent. Upregulation cytokinin biosynthetic gene ISOPENTENYLTRANSFERASE ( IPT ) proximal peripheral...
Plants have evolved signaling mechanisms such as the multi-step phosphorelay (MSP) to respond different internal and external stimuli. MSP responses often result in gene transcription regulation that is modulated through factors B-type Arabidopsis response regulator (ARR) proteins. Among these proteins, ARR2 a key component expressed ubiquitously involved many aspects of plant development. Although it has been noted ARRs bind their cognate genes DNA-binding domain termed GARP domain, little...