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Salt stress-induced cell death in the unicellular green alga Micrasterias denticulata
- M. Affenzeller, A. Darehshouri, A. Andosch, C. Lütz, U. Lütz-Meindl
- Medicine, Biology
- Journal of experimental botany
- 1 March 2009
Programmed cell death (PCD) is a key element in normal plant growth and development which may also be induced by various abiotic and biotic stress factors including salt stress. In the present study,… Expand
Physiological and morphological processes in the Alpine snow alga Chloromonas nivalis (Chlorophyceae) during cyst formation
Amongst a specialised group of psychrophilic microalgae that have adapted to thrive exclusively in summer snow fields, Chloromonas nivalis has been reported as a species causing green, orange or pink… Expand
Photosynthesis, pigments and ultrastructure of the alpine snow alga Chlamydomonas nivalis
Snow algae inhabit most of the cold regions worldwide, where long-lasting snow fields are common. The ecophysiology of snow algae has been studied intensively in North America and occasionally in… Expand
Algae and UV irradiation: effects on ultrastructure and related metabolic functions.
The effects of ultraviolet radiation in the biological relevant wavebands of UV-A (315-400 nm) and UV-B (280-315 nm) on algae have become an important issue as a man-made depletion of the protecting… Expand
Investigating cytoskeletal function in chloroplast protrusion formation in the arctic-alpine plant Oxyria digyna.
Arctic and alpine plants like Oxyria digyna have to face enhanced environmental stress. This study compared leaves from Oxyria digyna collected in the Arctic at Svalbard (78 degrees N) and in the… Expand
Characterization of an UV- and VIS-absorbing, purpurogallin-derived secondary pigment new to algae and highly abundant in Mesotaenium berggrenii (Zygnematophyceae, Chlorophyta), an extremophyte…
- D. Remias, S. Schwaiger, Siegfried Aigner, T. Leya, H. Stuppner, C. Lütz
- Biology, Medicine
- FEMS microbiology ecology
- 1 March 2012
Mesotaenium berggrenii is one of few autotrophs that thrive on bare glacier surfaces in alpine and polar regions. This extremophilic alga produces high amounts of a brownish vacuolar pigment, whose… Expand
Photodamage of the photosynthetic apparatus and its dependence on the leaf developmental stage in the npq1 Arabidopsis mutant deficient in the xanthophyll cycle enzyme violaxanthin de-epoxidase.
The npq1 Arabidopsis mutant is deficient in the violaxanthin de-epoxidase enzyme that converts violaxanthin to zeaxanthin in excess light (xanthophyll cycle). We have compared the behavior of mature… Expand
A freshwater green alga under cadmium stress: ameliorating calcium effects on ultrastructure and photosynthesis in the unicellular model Micrasterias.
- A. Andosch, M. Affenzeller, C. Lütz, U. Lütz-Meindl
- Biology, Medicine
- Journal of plant physiology
- 15 October 2012
Cadmium is a highly toxic heavy metal pollutant arising mainly from increasing industrial disposal of electronic components. Due to its high solubility it easily enters soil and aquatic environments.… Expand
Insights into the biology and phylogeny of Chloromonas polyptera (Chlorophyta), an alga causing orange snow in Maritime Antarctica
Abstract In Antarctica, mass accumulations of psychrophilic algae cause striking phenomena like green, orange, or red snow. This occurs during summer, when coastal snowfields start to melt, become… Expand
Temperature-sensitive formation of chloroplast protrusions and stromules in mesophyll cells of Arabidopsis thaliana
Summary.In leaf mesophyll cells of transgenic Arabidopsis thaliana plants expressing GFP in the chloroplast, stromules (stroma-filled tubules) with a length of up to 20 μm and a diameter of about… Expand