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  • 1
    Electronic Resource
    Electronic Resource
    Ascorbate and plant cell growth (1994)
    Springer
    Journal of bioenergetics and biomembranes 26 (1994), S. 399-405 
    Details
    ISSN: 1573-6881
    Keywords: Ascorbate ; cell wall ; onion root elongation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Physics
    Notes: Abstract Ascorbate and related enzymes are involved in the control of several plant growth processes. Ascorbate modulates cell growth by controlling (i) the biosynthesis of hydroxyproline-rich proteins required for the progression of G1 and G2 phases of the cell cycle, (ii) the cross-linking of cell wall glycoproteins and other polymers, and (iii) redox reactions at the plasma membrane involved in elongation mechanisms. The effect of ascorbate on onion root elongation is reviewed here. The ascorbate free radical induces a high vacuolization responsible for elongation. This effect may be dependent on the activity of the redox system linked to the plasma membrane. Current data are discussed on the basis of the modulation of the plasma membrane energetic state derived from the ascorbate-induced hyperpolarization and the activity of an intrinsic transplasmalemma ascorbate-regenerating enzyme.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00762781
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  • 2
    Electronic Resource
    Electronic Resource
    Rooting hastened in onions by ascorbate and ascorbate free radical (1996)
    Springer
    Journal of plant growth regulation 15 (1996), S. 53-56 
    Details
    ISSN: 1435-8107
    Keywords: Ascorbate ; Ascorbate free radical ; Root elongation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Treatment of onion bulbs with ascorbate or its free radical hastened root emergence on the basal plate in relation to treatments with water or dehydroascorbate. This stimulation was accompanied by a significant increase of DNA synthesis per primordium. After a 24-h imbibition, ascorbate and ascorbate free radical also increased cell length. Ascorbate and ascorbate free radical apparently activated the onset of cell proliferation in root primordia, resulting in a shortening in G1-S transition. The possible action of the ascorbate system at the plasma membrane level is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00192931
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    Paper (German National Licenses)
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