Horticulture, Environment, and Biotechnology : HEB

Korean Society of Horticultural Science (한국원예학회)
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Production of Chrysanthemum Transplants as Affected by Hydroponic Systems, Electrical Conductivity in Nutrient Solution, and Photosynthetic Photon Flux

kim, Sun-Ja;Hahn, Eun-Joo;Paek, Kee-Yoeup

  • Published : 20060000
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Abstract

Single node cuttings of chrysanthemum (Dendranthema grandiflorum Kitam ‘Cheonsu’) propagated in bioreactors were transferred ex vitro and acclimatized for 30 days under hydroponic systems [sand, mixed substrate (peatmoss:perlite = 1:1, v/v), and deep flow technique (DFT)], electrical conductivity (EC) of nutrient solution (0.8, 1.6, and 3.0 dSㆍm⁻¹), and photosynthetic photon flux (PPF) (50, 100, and 250 μ㏖ㆍm⁻²ㆍs⁻¹). DFT and mixed substrate cultures resulted in greater plantlet growth compared with sand (control), and the highest growth was obtained in the DFT. Both PPF and EC level played a key role in the growth enhancement. Plantlet growth increased with increasing PPF and BC level, showing the highest growth at a PPF of 250 μ㏖ㆍm⁻²ㆍs⁻¹ and an EC of 3.0 dSㆍm⁻¹, A similar pattern was also observed in CO₂ uptake rate, which started to increase after 5 days of acclimatization and became significant with a linear increase at 250 μ㏖ㆍm⁻²ㆍs⁻¹ PPF combined with 3.0 dSㆍm⁻¹ EC until the end of acclimatization.

Keywords

References

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