A5078919884- Biocrusts and Microbial Ecology
- Algal biology and biofuel production
- Marine and coastal plant biology
- Photosynthetic Processes and Mechanisms
- Polar Research and Ecology
- Aquatic Ecosystems and Phytoplankton Dynamics
- Protist diversity and phylogeny
- Peroxisome Proliferator-Activated Receptors
- Diatoms and Algae Research
- Microbial Community Ecology and Physiology
- Lichen and fungal ecology
- Plant Stress Responses and Tolerance
- Marine and coastal ecosystems
- Plant Reproductive Biology
- Plant Molecular Biology Research
- Metabolism and Genetic Disorders
- Polysaccharides and Plant Cell Walls
- Marine Sponges and Natural Products
- Drug Transport and Resistance Mechanisms
- Adipose Tissue and Metabolism
- Plant responses to elevated CO2
- Light effects on plants
- Allergic Rhinitis and Sensitization
- Geology and Paleoclimatology Research
- Adenosine and Purinergic Signaling
Universität Innsbruck
2016-2025
Haukeland University Hospital
2013
Ostschweizer Kinderspital
2013
Ludwig-Maximilians-Universität München
1999-2011
München Klinik
2009
LMU Klinikum
2005
University of Salzburg
1995-2003
Université de Bourgogne
2001
CS Diagnostics
2001
University of Vienna
2001
Although most green algae typically occur in aquatic ecosystems, many species also live partly or permanently under aeroterrestrial conditions, where the cells are exposed to atmosphere and hence regularly experience dehydration. The ability of algal survive an air-dried state is termed desiccation tolerance. mechanisms involved tolerance still poorly understood, aim this review summarize recent findings on effects osmotic water loss. Starting from structural changes, physiological,...
Abstract Zygnematophyceae are the algal sisters of land plants. Here we sequenced four genomes filamentous Zygnematophyceae, including chromosome-scale assemblies for three strains Zygnema circumcarinatum . We inferred traits in ancestor and plants that might have ushered conquest by plants: expanded genes signaling cascades, environmental response, multicellular growth. share all major enzymes cell wall synthesis remodifications, gene gains shaped this toolkit. Co-expression network...
Green algae are major components of biological soil crusts in alpine habitats. Together with cyanobacteria, fungi and lichens, green form a pioneer community important for the organisms that will succeed them. In their high altitudinal habitat these exposed to harsh strongly fluctuating environmental conditions, mainly intense irradiation, including ultraviolet radiation, lack water leading desiccation. Therefore, surviving environments must have evolved either avoidance or protective...
Abstract Ragweed pollen is the main cause of allergenic diseases in Northern America, and weed has become a spreading neophyte Europe. Climate change air pollution are speculated to affect potential pollen. The objective this study was investigate effects NO 2 , major pollutant, under controlled conditions, on allergenicity ragweed exposed different levels throughout entire growing season, its further analysed. Spectroscopic analysis showed increased outer cell wall polymers decreased...
ABSTRACT The filamentous and unicellular algae of the class Zygnematophyceae are closest algal relatives land plants. Inferring properties last common ancestor shared by these plants allows us to identify decisive traits that enabled conquest We sequenced four genomes (three strains Zygnema circumcarinatum one strain Z. cylindricum ) generated chromosome-scale assemblies for all emerging model system . Comparative genomic analyses reveal expanded genes signaling cascades, environmental...
Thyroid transcription factor-1 (TTF-1), a member of the NKx2 family homeodomain factors, is expressed in epithelial cells thyroid gland and lung. To produce monoclonal antibodies specific for TTF-1, polypeptide was E. coli purified utilizing affinity chromatography polyhistidine-tagged TTF-1 fusion protein. Splenocytes from BALB/c mice immunized with recombinant were fused P3x/63Ag8.653 myeloma to hybridomas. Tissue culture supernatant screened anti activity by ELISA employing as antigen....
Inherited defects in the peroxisomal ATP-binding cassette (ABC) transporter adrenoleukodystrophy protein (ALDP) lead to lethal disorder X-linked (X-ALD), for which no efficient treatment has been established so far. Three other ABC transporters currently are known: adrenoleukodystrophy-related (ALDRP), 70 kDa membrane (PMP70) and PMP70-related protein. By using transient stable overexpression of human cDNAs encoding ALDP its closest relative ALDRP, we could restore impaired β-oxidation...
Aeroterrestrial filamentous green algae of the genus Klebsormidium (Klebsormidiales, Streptophyta) are typical components biological soil crusts, which occur worldwide in arid and semiarid habitats including alpine regions. In present study, crenulatum (Kütz.) Lokhorst was isolated from an crust above timberline Austrian Alps. Growth responses, photosynthetic performance, desiccation tolerance were measured under controlled laboratory conditions. K. exhibited optimal growth highest...
Pontocerebellar hypoplasia with spinal muscular atrophy, also known as PCH1, is a group of autosomal recessive disorders characterized by generalized muscle weakness and global developmental delay commonly resulting in early death. Gene defects had been discovered only single patients until the recent identification EXOSC3 mutations several families relatively mild course PCH1. We aim to genetically stratify subjects large well-defined cohort define clinical spectrum genotype-phenotype...
Desiccation tolerance is commonly regarded as one of the key features for colonization terrestrial habitats by green algae and evolution land plants. Extensive studies, focused mostly on physiology, have been carried out assessing desiccation resilience streptophytic genera Klebsormidium Zygnema. Here we present transcriptomic analyses Zygnema circumcarinatum exposed to stress. Cultures Z. grown in liquid medium or agar plates were desiccated at ∼86% relative air humidity until effective...
The osmotic potential and effects of plasmolysis on photosynthetic oxygen evolution chlorophyll fluorescence were studied in two Arctic Zygnema sp. (strain B, strain G) Antarctic E, D). D was newly characterized by rbcL sequence analysis the present study. strains, are most closely related may represent different isolates same species, contrast, B G separate lineages. Incipient cells determined light microscopy after incubating sorbitol solutions ranging between 200 mM 1000 for 3, 6 24h. In...
Land plants inherited several traits from their green algal ancestors (Zygnematophyceae), including a polysaccharide-rich cell wall, which is prerequisite for terrestrial survival. A major component of both land plant and Zygnematophyceaen walls the pectin homogalacturonan (HG), its high water holding capacity may have helped algae to colonize habitats, characterized by scarcity. To test this, HG was removed Zygnema filaments pectate lyase (PL), effective quantum yield photosystem II (YII)...
Proteins essential for the assembly of functional peroxisomes are designated peroxins and encoded by PEX genes. In yeast, Pex3p was previously identified as a peroxisomal integral membrane protein indispensable peroxisome biogenesis integrity. Here we report cloning orthologous human PEX3 gene. It encodes polypeptide 373 amino acids (42 kDa) is expressed in all tissues examined. As shown transfection epitope tagged constructs immunofluorescence analysis, localized at peroxisome. The...
Breakdown of chlorophyll is a major contributor to the diagnostic color changes in fall leaves, and ripening apples pears, where it commonly provides colorless, nonfluorescent tetrapyrroles. In contrast, bananas (Musa acuminata) chlorophylls fade give unique fluorescent catabolites (FCCs), causing yellow glow blue, when observed under UV light. Here, we demonstrate capacity blue signal symptoms programmed cell death plant. We report on studies bright luminescent rings peel very ripe bananas,...
Ultraviolet (UV) radiation has become an important stress factor in polar regions due to anthropogenically induced ozone depletion. Although extensive research been conducted on adaptations of organisms this factor, few studies have focused semi-terrestrial algae so far, spite their apparent vulnerability. This study investigates the effect UV two arctic strains (B, G) and one Antarctic strain (E) green alga Zygnema, isolated from Arctic habitats. Isolates Zygnema were exposed experimentally...
Remias D., Holzinger A. and Lütz C. 2009. Physiology, ultrastructure habitat of the ice alga Mesotaenium berggrenii (Zygnemaphyceae, Chlorophyta) from glaciers in European Alps. Phycologia 48: 302–312. DOI: 10.2216/08-13.1.
Climate change and air pollution, including ozone is known to affect plants might also influence the ragweed pollen, carry strong allergens. We compared transcriptome of pollen produced under ambient elevated by 454-sequencing. An enzyme-linked immunosorbent assay (ELISA) was carried out for major allergen Amb a 1. Pollen surface examined scanning electron microscopy attenuated total reflectance–Fourier transform infrared spectroscopy (ATR-FTIR), phenolics were analysed high-performance...
The filamentous green alga Z ygogonium ericetorum (Zygnematophyceae, Streptophyta) was collected in a high‐alpine rivulet Tyrol, Austria. Two different morphotypes of this were found: purple morph with visible vacuolar content and lacking coloration. These compared respect to their secondary metabolites, ultrastructure, ecophysiological properties. Colorimetric tests aqueous extracts the indicated presence soluble compounds such as phenolics hydrolyzable tannins. High‐performance liquid...