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  • 2000-2004  (3)
  • 1955-1959
  • 1840-1849
  • 2000  (3)
  • protoplasts
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Plant molecular biology 44 (2000), S. 359-368 
    ISSN: 1573-5028
    Keywords: Arabidopsis ; PCD induction ; programmed cell death ; protoplasts ; suspension cell cultures
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract In plants most instances of programmed cell death (PCD) occur in a number of related, or neighbouring, cells in specific tissues. However, recent research with plant cell cultures has demonstrated that PCD can be induced in single cells. The uniformity, accessibility and reduced complexity of cell cultures make them ideal research tools to investigate the regulation of PCD in plants. PCD has now been induced in cell cultures from a wide range of species including many of the so-called model species. We will discuss the establishment of cell cultures, the fractionation of single cells and isolation of protoplasts, and consider the characteristic features of PCD in cultured cells. We will review the wide range of methods to induce cell death in cell cultures ranging from abiotic stress, absence of survival signals, manipulation of signal pathway intermediates, through the induction of defence-related PCD and developmentally induced cell death.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Plant cell, tissue and organ culture 60 (2000), S. 79-82 
    ISSN: 1573-5044
    Keywords: cell suspensions ; Lolium multiflorum L. ; membrane filter-nurse culture ; Oryza sativa L. ; protoplasts ; two-step shoot regeneration
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A reproducible plant regeneration system has been developed for protoplasts from embryogenic cell suspension cultures of the commercial Asian long-grain javanica rice, Oryza sativa cv. Azucena. Protoplasts were isolated routinely from cell suspensions with yields of 5.5–12.0 × 106 g-1 fresh weight. A membrane filter nurse-culture method was adopted and was essential to support sustained mitotic division of protoplast-derived cells, leading to cell colony formation. The protoplast plating efficiency was higher when suspension cells of Lolium multiflorum, rather than those of the japonica rice O. sativa L. cv. Taipei 309, were employed as nurse cells. A two-step shoot regeneration procedure, in which protoplast-derived calli were cultured initially on medium semi-solidified with 1% (w/v) agarose followed by culture on medium containing 0.4% (w/v) agarose, induced plant regeneration from protoplast-derived calli. Fifteen percent of protoplast-derived tissues regenerated shoots; tissues not subjected to this treatment failed to develop shoots.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Plant cell, tissue and organ culture 61 (2000), S. 81-85 
    ISSN: 1573-5044
    Keywords: cell suspensions ; embryogenesis ; Hevea brasiliensis ; plant regeneration ; protoplasts
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Embryogenic cell suspensions of rubber derived from immature inflorescences and inner integuments of immature fruits released 3.1 ± 0.2 × 107 protoplasts g-1 f. wt. (mean ± s.e.m, n = 10) and 3.2 ± 0.2 × 107 protoplasts g-1 f. wt., with mean viabilities of 83 ± 2% and 77 ± 8%, respectively. Sustained mitotic division was observed only when protoplasts were cultured in KPR liquid medium on nitrocellulose membranes overlying the same semi-solid medium containing Lolium multiflorum nurse cells. Protoplast-derived cell colonies were produced within 2 months of culture. Protoplast-derived cell colonies proliferated, upon subculture to MS-based regeneration medium, with 40% of the protoplast-derived calli developing somatic embryos. The latter germinated into plants on the same medium after 3 months of culture.
    Type of Medium: Electronic Resource
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