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  • 1
    Electronic Resource
    Electronic Resource
    Induction of stem elongation on in vitro chicory root explants under unfavourable photoperiodic conditions by gibberellin A3 (1995)
    Springer
    Plant growth regulation 16 (1995), S. 239-241 
    Details
    ISSN: 1573-5087
    Keywords: chicory ; Cichorium intybus L. ; in vitro ; stem elongation ; flowering ; gibberellins
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Flowering stems are formed under long-day conditions on root explants of chicory (Cichorium intybus L.) cultured in vitro while under short days, only vegetative growth is observed. Under short-day conditions (12 h), stem elongation is induced by treating newly formed shoot apices with GA3 (1 μl, 10−3M). No flower buds were formed on the GA3-induced stems. Long days seem to be indispensable for the induction of flower buds on the elongated stem.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00024779
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  • 2
    Electronic Resource
    Electronic Resource
    Influence of gibberellin biosynthesis inhibitors on stem elongation and floral initiation on in vitro chicory root explants under dark and light conditions (1995)
    Springer
    Plant growth regulation 17 (1995), S. 47-52 
    Details
    ISSN: 1573-5087
    Keywords: chicory ; Cichorium intybus L. ; cyclohexanetriones ; flowering ; gibberelin biosynthesis inhibitors ; in vitro ; norbornanodiazetins ; onium type compounds ; stem elongation ; triazole-type compounds
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Root explants of chicory (Cichorium intybus L.) were cultured in vitro under continuous light or darkness. On a standard medium (no plant growth regulators added), flowering-stems were initiated under continuous light while under continuous dark, vegetative-stems were formed. Different types of GA (gibberellin) biosynthesis inhibitors were added to the culture medium. Paclobutrazol and compounds belonging to the group of cyclohexanetriones clearly reduced flowering-stem growth under light conditions and vegetative-stem growth under dark conditions. Under light conditions, flower bud initiation was not affected. These and other results suggest that GA1 may be synthesized during the in vitro culture period and that it controls flowering-stem growth but not floral initiation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00024494
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  • 3
    Electronic Resource
    Electronic Resource
    Stem elongation and floral initiation on in vitro chicory root explants: influence of photoperiod (1995)
    Springer
    Plant growth regulation 16 (1995), S. 233-238 
    Details
    ISSN: 1573-5087
    Keywords: chicory ; Cichorium intybus L. ; in vitro ; stem elongation ; flowering ; photoperiod
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Chicory root explants (Cichorium intybus L.) were cultured in vitro under different photoperiods. In complete darkness, strong stem elongation, but no flowering induction was observed. We suggest that this stem elongation could be homologous to the pit growth in chicory heads in vivo. Under a photoperiod of 12 h (LI=±40 μE m−2 s−1), only vegetative growth was observed. Photoperiods of 16 h or more light a day induced the in vitro explants to develop stems bearing flower buds. When the in vitro cultures were kept in the dark for different durations starting from the first day of culture and afterwards transferred to long-day conditions, 4 days dark were sufficient to cause a decrease in flowering induction. We suggest that during the dark culture, a flowering inhibitory process was started.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00024778
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