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  • 1
    Electronic Resource
    Electronic Resource
    Reprogramming of cells following wounding in pea (Pisum sativum L.) roots. I. Cell division and differentiation of new vascular elements (1982)
    Springer
    Protoplasma 112 (1982), S. 143-151 
    Details
    ISSN: 1615-6102
    Keywords: Cell division ; Differentiation ; Microtubules ; Preprophase bands ; Vascular elements ; Regeneration ; Transfer cells
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Normally quiescent cortical tissue of pea roots can be induced, by severing the adjacent vascular cylinder of the root, to undergo redifferentiation to form new files of tracheary and sieve elements which bridge the wound. The development of vascular transfer cells is also induced. Redifferentiation is normally accompanied by division of the original cortical cells. The planes of cell division, especially those preceding sieve element formation, are aligned very precisely in adjacent cells, to produce smooth files of cells. In roots wounded 3–4 mm from the apex, bands of microtubules in the periphery of the cells (pre-prophase bands) form at sites which correspond to the expected planes of cell division.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01284088
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Reprogramming of cells following wounding in pea (Pisum sativum L.) roots. II. The effects of caffeine and colchicine on the development of new vascular elements (1982)
    Springer
    Protoplasma 112 (1982), S. 152-166 
    Details
    ISSN: 1615-6102
    Keywords: Colchicine ; Caffeine ; Redifferentiation ; Vascular elements ; Wall formation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Interference with the normal progression of the cell cycle by the drugs caffeine and colchicine does not prevent parenchyma cells in the cortex of pea roots from being reprogrammed to become tracheary and sieve elements following severance of the vascular cylinder of the root. The pattern of secondary wall deposition of the newly differentiated tracheary elements is highly aberrant in the presence of colchicine but is of normal appearance in the caffeinetreated roots. In each case, the new sieve elements have sieve plates and lateral sieve areas with callose deposits. Induction and redifferentiation are achieved in the absence of cell division and microtubules in colchicine-treated roots. Bi- and multi-nucleate cells are produced by both drugs. Microtubules are still present in the caffeine-treated roots but cell plate formation is inhibited. The partitioning of the multinucleate cortical cells by the interdigitation of “free-growing” walls between the nuclei occurs in the presence of caffeine but not colchicine.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01284089
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    Paper (German National Licenses)
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