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  1. Article

    Open Access

    The effects of drought and nutrient addition on soil organisms vary across taxonomic groups, but are constant across seasons

    Anthropogenic global change alters the activity and functional composition of soil communities that are responsible for crucial ecosystem functions and services. Two of the most pervasive global change drivers...

    Julia Siebert, Marie Sünnemann, Harald Auge, Sigrid Berger… in Scientific Reports (2019)

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  2. No Access

    Article

    Influence of ecological conditions on magnesium and strontium content and ultrastructure of the calcareous skeleton ofBornetella sphaerica (Zarnadini), Dasycladales

    Der Einfluß der Temperatur und Lichtintensität auf die Ultrastruktur und auf den Einbau von Magnesium und Strontium bei den karbonatischen Skeletten vonBornetella sphaerica wurde untersucht. Die Algen wurden in L...

    Sigrid Berger, Matthias J. Kaever, Bernhard Reichel in Paläontologische Zeitschrift (1997)

  3. No Access

    Article

    Microtubule formation on the nuclear surface during meiosis inAcetabularia acetabulum

    Microtubules (MT) are a feature of all eukaryotic cells. However, they have not been observed in the cytoplasm of the vegetative phase ofAcetabularia acetabulum. Previous investigators have reported that, in the ...

    L. B. Liddle, S. Gleissberg, G. Giese, Sigrid Berger in Protoplasma (1997)

  4. No Access

    Article

    Prenyl lipid and fatty-acid synthesis in isolatedAcetabularia chloroplasts

    A gentle procedure allowed the isolation of intact and highly active chloroplasts from the unicellular green algaAcetabularia mediterranea. These chloroplasts incorporated carbon from NaH14CO3 into fatty acids an...

    Ralf Bäuerle, Friedhelm Lütke-Brinkhaus, Bodo Ortmann, Sigrid Berger… in Planta (1990)

  5. No Access

    Article

    Karyology ofAcetabularia mediterranea

    Meiotic and mitotic divisions of the nuclei ofAcetabularia mediterranea were studied with the aid of DAPI fluorochrome and fluorescence microscopy. We report, for the first time, the formation of 20 bivalents in ...

    Deepesh N. De, Sigrid Berger in Protoplasma (1990)

  6. No Access

    Chapter

    Acetabularia: A Giant Unicellular Organism for Studying Polarity

    To understand the biochemical and cytological basis of cell polarity is to gain insight into the process of differentiation. When organisms differentiate, modifications of morphological and functional characte...

    Sigrid Berger, Walter L. Dillard in Experimental Embryology in Aquatic Plants and Animals (1990)

  7. No Access

    Chapter

    Dasycladaceae: A Family of Giant Unicellular Algae Ideal for Research

    Algae of the family Dasycladaceae belong to the most fascinating and promising objects in cell biological research. Due to their special features which are described below they have contributed fundamental kno...

    Sigrid Berger in Experimental Embryology in Aquatic Plants and Animals (1990)

  8. No Access

    Article

    The plastome of Acetabularia mediterranea and Batophora oerstedii: inter-and intraspecific variability and physical properties

    Cells from Acetabularia mediterranea and Batophora oerstedii have been cloned and several lines established from these clones. Chloroplast DNA (cpDNA) was isolated from these lines and characterized by restrictio...

    Michael B. Leible, Sigrid Berger, Hans-Georg Schweiger in Current Genetics (1989)

  9. No Access

    Chapter

    Pattern Formation in Acetabularia

    The differing morphologies of the innumerable organisms of the world provide a basis to distinguish and classify them. There are higher multicellular or relatively simple unicellular organisms and even subcell...

    H. G. Schweiger, Sigrid Berger in Cytomorphogenesis in Plants (1981)

  10. No Access

    Article

    An apparent lack of non-transcribed spacers in rDNA of a green alga

    Actively transcribed DNA was made visible in nuclear material from the giant unicellular green alga Batophora oerstedii (Chlorophyta, Dasycladaceae) by means of Miller's spreading technique. A conspicuous feature...

    Sigrid Berger, Hans-Georg Schweiger in Molecular and General Genetics MGG (1975)

  11. No Access

    Article

    Morphology of the nucleo-cytoplasmic interactions during the development ofAcetabularia cells

    An electron microscopic survey of nuclear events and changes in the perinuclear cytoplasm during the generative phase ofAcetabularia is presented with details on late stages in the maturation of the primary nucle...

    Sigrid Berger, W. Herth, W. W. Franke, H. Falk, H. Spring… in Protoplasma (1975)

  12. No Access

    Article

    Third symposium onAcetabularia

    A. B. Alexeev, S. L. Stvolinsky, L. A. Tikhomirova, A. A. Yazykov… in Protoplasma (1975)

  13. No Access

    Article

    Ribosomal DNA in different members of a family of green algae (Chlorophyta, Dasycladaceae): an electron microscopisal study

    Active cistrons and non-transcribed spacers of rDNA were made visible in spread preparations of nucleolar material from different species of the green alga family Dasycladaceae (Chlorophyta). The data observed sh...

    Sigrid Berger, Hans-Georg Schweiger in Planta (1975)

  14. No Access

    Article

    RNA- synthesis inAcetabularia

    Incorporation of precursors of RNA into the enucleated cells ofAcetabularia mediterranea andPolyphysa cliftonii has been studied under conditions which exclude the possibility of errors due to contamination of th...

    H. G. Schweiger, W. L. Dillard, A. Gibor, Sigrid Berger in Protoplasma (1967)

  15. No Access

    Article

    RNA-synthesis inAcetabularia

    RNA-synthesis by isolated chloroplasts fromAcetabularia mediterranea andPolyphysa cliftonii has been studied under conditions which exclude the possibility of errors due to contamination of the preparations by nu...

    Sigrid Berger in Protoplasma (1967)