EFFECT OF PHOTON FLUX DENSITY ON CO₂ FIXATION AND GROWTH OF ROSA HYBRIDA ‘WHITE GEM’ MICROCUTTINGS

In vitro and ex vitro8-rooted microcuttings of Rosa hybrida ‘White Gem’ were grown at two photon flux densities (50 and 150 μmol m^-2 s^-1 PAR) and at two CO₂ concentrations (350 and 1200 μmol mol^-1). A photon flux density of 150 μmol m^-2 s^-1 increased dry weight of shoots and roots of in vitro and ex vitro-rooted plants, irrespective of the CO₂ concentration applied. ¹⁴CO₂ fixation of 12-weeks old plants was about 10 times higher than CO₂ fixation of microcuttings.

III International Symposium on Artificial Lighting in Horticulture

B. Matysiak, M. Kubik, M. Podwyszynska, J. Nowak

acclimatization, CO₂ enrichment, light, micropropagation, Rosa

https://doi.org/10.17660/ActaHortic.1997.418.13