Should we reconsider the use of deionized water as control vase solutions?
Meeteren, U. van, Gelder, A. van, Ieperen, W. van and Slootweg, C.
Acta Horticulturae Year: 2001 Issue: No. 543 Pages: 257-262 Ref: 17 ref.
2000
บทคัดย่อ
In Bouvardia 'Van Zijverden' flowers held in deionized water leaf wilting started from day 6 of vase life, while flowers placed in tap water did not show any leaf wilting for the 14 days of the experiment. Fresh weight of chrysanthemum (Dendranthema grandiflorum [D. morifolium]) 'Cassa' flowers started to decrease after three days in deionized water. In a solution of major tap water components (0.7mM CaCl2+ 1.5mM NaHCO3+ 0.005mM CuSO4) fresh weight of the chrysanthemum flowers did not decrease within the 7 days of the experiment. CuSO4 alone, or a mixture of CaCl2 + NaHCO3 did not have this positive effect on fresh weight. However, none of three rose cultivars (Madelon, First Red, Frisco) showed a difference in fresh weight during vase life between deionized water or the solution of CaCl2 + NaHCO3 + CuSO4. When copper was replaced by AgNO3 or DICA, fresh weight of chrysanthemum did not decrease within the 7 days of the experiment, while it decreased from day 2 when only CaCl2 + NaHCO3 was presen
t in the vase solution. Bouvardia flowers in AgNO3 dissolved in deionized water did not show any leaf wilting, while all stems of flowers placed in NaNO3 or deionized water did. The relevance of deionized water as control treatment in vase life experiments was questioned. It is proposed to use a solution of CaCl2 + NaHCO3 + CuSO4 as 'standardized tap water'.