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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Biologia plantarum 40 (1997), S. 75-79 
    ISSN: 1573-8264
    Keywords: growth inhibition ; Pisum sativum ; red light
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract In order to clarify the role of endogenous growth inhibitors A-2α and A-2β in a dwarf pea plant, red light (emission peak 657 nm) treated, 9-d-old seedlings of dwarf pea (Pisum sativum L. cv. Progress No. 9) were transferred to darkness, and the resulting changes in growth rate and concentrations of A-2α and A-2β were monitored. The growth rate of the epicotyls increased, and the concentration of the inhibitors in the epicotyls decreased, according to sigmoidal time courses. The relationship between the logarithms of the concentration of the inhibitors and the corresponding growth rate was linear. These results suggest that A-2α and A-2β, may play an important role in the growth recovery process of the dwarf pea cultivar after termination of red light irradiation.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Biologia plantarum 40 (1997), S. 575-580 
    ISSN: 1573-8264
    Keywords: legume ; Pisum sativum ; violaxanthin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The distribution of xanthoxin (Xan), was determined in light-grown, 20-d-old pea (Pisum sativum L. cv. Progress No. 9) seedlings. The cis,trans-xanthoxin (c,t-Xan) and the trans,trans-xanthoxin (t,t-Xan) were more abundant in the young leaves and terminal bud; their concentrations in leaves were 2 - 3 times those in internodes of the same nodes. After the onset of red-light-irradiation, the concentration of both Xan isomers in 7-d-old dark-grown pea seedlings increased after a 12-h lag time. The increased level of Xan was greatest in the terminal bud and decreased to lower parts of the seedlings. The ratio of c,t-Xan to t,t-Xan concentration in the seedlings was about 2:3.
    Type of Medium: Electronic Resource
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