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• Innovative research of ornamental plants in University of Debrecen (2001–2014)

  111-117.

  T. Kaprinyák

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  157

  In the University of Debrecen started in 2001 related and biotechnology, genetic researches on climate-changerelated.
  This work has already visible signs on the city’s public spaces. The main goal of participants of the program is it that
  in Debrecen and in the surrounding communities more adaptable to the variable climate, ecologically and biologically more
  grounded urban ornamental planting are preferred in the next decade. The new results and ongoing researches of the decorative
  ornamental and biomass plants are an interdisciplinary breeding program.

• Morphological, physiological features and differences of Vriesea splendens ’Fire’ plants during in vitro multiplication and rooting

  M. Ördögh

  Views:

  134

  During in vitro multiplication and rooting of Vriesea splendens ’Fire’, 0.1, 0.2, 0.4 and 0.8 mg l^-1 benzyladenine (BAP), benzyladenine-riboside (BAPR), kinetin (KIN), meta-topoline (MT), indole-butyric acid (IBA) and naphthalene-acetic acid (NAA) were added to basal Murashige and Skoog (1962) MS medium. As compared to the hormone-free control, plants developed significantly more shoots on medium supplemented with almost all cytokinins (excepting KIN), especially BAP resulted the highest multiplication up to almost 26 shoots. Enhancement of cytokinin concentrations increased shoot number (and in case of BAP, peroxidase activity) but decreased plant height and rooting parameters. Regarding root production, both auxins were definitely beneficial (0.2 mg l^-1 NAA resulted more than 7.5 roots and higher auxin concentrations efficiently stimulate root elongation); however, KIN had similar effects. After a three-month duration time of acclimatization, we observed that plants which were previously cultured on medium containing certain cytokinins (KIN in all doses and 0.1 mg l^-1 MT) or both auxins had greater survival, moreover, as negative after-effect, higher cytokinin concentrations reduced the number of survived specimens.