Abstract
The effects of mineral nutrient were examined on in vitro growth of Gerbera hybrida (G. jamesonii × G. viridifolia), specifically Gerbera hybrida cv. Pasadena. Four types of experiments were conducted to quantify the effects of mineral nutrients on four in vitro growth responses (quality, shoot number, leaf number, and shoot height) of gerbera and included groups of mineral nutrients (macros/mesos, micros, and Fe), individual salts (CuSO4·5H2O, MnSO4·4H2O, ZnSO4·7H2O, and Fe/EDTA), and the specific ions NO3 −, NH4 +, and K+. Experiments included mixture-amount designs that are essential for separating the effects of proportion and concentration. Highly significant effects were observed in all experiments, but the mineral nutrients with the largest effects varied among the four growth responses. For example, leaf number was strongly affected by the macronutrient group in one experiment and by NH4 + and K+, which were in the macronutrient group, in the NO3 −/NH4 +/K+ ion-specific experiment, whereas quality was strongly affected by the micronutrients ZnSO4 and Fe/EDTA. Because mineral nutrient effects varied significantly with the response measured, defining an appropriate formulation requires a clear definition of “optimal” growth.
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Acknowledgments
We thank Mr. Randy Strode, President of Agri-Starts, Inc., for generously providing the Gerbera hybrida cv. ‘Pasadena’ stock cultures used in these studies.
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Niedz, R.P., Hyndman, S.E., Evens, T.J. et al. Mineral nutrition and in vitro growth of Gerbera hybrida (Asteraceae). In Vitro Cell.Dev.Biol.-Plant 50, 458–470 (2014). https://doi.org/10.1007/s11627-014-9620-6
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DOI: https://doi.org/10.1007/s11627-014-9620-6