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  • Digitale Medien  (3)
  • Protoplasts  (3)
  • 1
    ISSN: 1432-203X
    Schlagwort(e): Alginate films ; Barley ; Cell suspensions ; Plant regeneration ; Protoplasts
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Summary Using a modification of the alginate film culture technique we show that it is possible to prepare and culture tobacco mesophyll and barley cell suspension protoplasts without centrifugation. Comparable division frequencies and colony development were observed from protoplasts embedded with enzyme and protoplasts purified by centrifugation. A 3 × 30 min washing regime was found to be the minimum time necessary to remove the enzyme from the gelled alginate matrix. The procedure provides a more gentle method for isolating protoplasts. It has the additional benefit of recovering all of the cells released from the starting tissue. In particular, the smaller protoplasts that are frequently lost during conventional isolation, are maintained. In barley, we illustrate the use of the system for recovering plants from embryogenic protoplast-derived calli from the cultivars Dissa and Igri. Finally, using small volumes of enzyme (50 μl) single cell aggregates were used to isolate and culture protoplasts.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Springer
    Theoretical and applied genetics 73 (1987), S. 769-783 
    ISSN: 1432-2242
    Schlagwort(e): Microculture ; Electrofusion ; Microinjection ; Karyoplasts ; Cytoplasts ; Protoplasts ; Plant regeneration ; Conditioning ; Brassica napus ; Nicotiana tabacum
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Summary Due to the heterogeneity in morphology, physiological and morphogenetical capabilities of higher plant cells in mass culture, the development of methods for individually culturing defined cells seemed to be useful and necessary. Individual cell culture represents a powerful tool for studies on the physiology of different cell types, the analysis of differentiation programs, the genetic manipulation of plant cells and cell-cell interactions. An improved microculture system based on a computer-controlled set-up for the efficient selection, transfer and individual culture of defined higher plant cells until regeneration of whole plants is described. Related experimental approaches for individually manipulating higher plant cells under controlled conditions, such as electrofusion of defined pairs of protoplasts and subprotoplasts, cell reconstruction and intranuclear microinjection of protoplasts and karyoplasts — mainly performed with cells of the crop plant Brassica napus L. — are presented.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 3
    ISSN: 1615-6102
    Schlagwort(e): Physcomitrella protonemata ; Chloroplast division ; Cytoskeleton ; Cell division abnormalities ; Microinjection ; Moss mutant ; Protoplasts
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Summary An X-ray induced mutant (PC22) of the moss,Physcomitrella patens was analysed with respect to its morphology, physiology and suitability for microculture techniques. The mutant protonemata are defective in bud formation and in chloroplast division. As a consequence of the latter, giant chloroplasts are formed which disturb the development of the phragmoplast, the formation of regular cross walls, and cell division. Abnormal cross walls are rich in callose. The actin cytoskeleton was found to be less regularly developed in the mutant than in the wild type. Three-dimensional analysis of the microtubular arrangement with confocal laser scan microscopy demonstrates a close association between spindle- or phragmoplast- and “interphase”-microtubules. The deficiencies in chloroplast division and in bud formation can partly be compensated for by exogeneously applied cytokinin. The suitability of this particular developmental mutant for further studies was shown by regeneration of protoplasts in microculture and microinjection of the fluorochrome Lucifer yellow into the chloroplast.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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