Article | . 2014 Vol. 32, Issue. 1
Antimicrobial Effect of Chlorine Dioxide on Vase Life of Cut Rose ‘Beast’



Department of Environmental Horticulture, The University of Seoul1
Natural Science Research Institute, The University of Seoul2




2014.. 60:65


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This study was conducted to investigate the antimicrobial effect of chlorine dioxide (ClO2) on the vase life of cut rose ‘Beast’ (Rosa hybrida L.). Postharvest treatments to extend the vase life of cut roses were divided into two: holding solution treatment and pulsing solution treatment. In holding solution treatment, the cut roses were treated with preservative solutions containing tap water (TW, control), distilled water (DW), ClO2 2, 4, 6, and 8 µL・L-1, and compared with a commercialized antimicrobial compound of 8-HQS 200 µL・L-1. In pulsing solution treatment, cut roses were dipped into the ClO2 solutions of 50, 100, 150, 200, and 250 µL・L-1 for 60 seconds and were placed in DW. The air temperature was 18.4°C, RH 51.5%, and light (photosynthetically active radiation, PAR) 3.6 µmol・m-2・s-1 with 12 hour day length. The longest vase life of cut roses was observed in the holding solution with ClO2 4 µL・L-1 as 13.8 days and pulsing with 200-250 µL・L-1 as 13.5-13.7 days, where vase life were extended four days longer than TW. Whereas, the inclusion of 8-HQS 200 µL・L-1 in vase solution resulted in phytotoxicity. The relative fresh weight and water uptake have similar tendencies. Bacteria inhibition by ClO2 and 8-HQS were very effective. But bacteria at TW and DW treatments on cut flower with stem were detected in 3.7 × 105 CFU・L-1 and 6.3 × 105CFU・L-1, respectively (without stem in DW 1.4 × 104 CFU・L-1). The ClO2 contents in holding solution of all treatments were scavenged in two-four days after treatment. This study indicated that ClO2 4 µL・L-1 holding solution treatment and 200-250 µL・L-1 pulsing solution treatment can be applied to extend the postharvest life of cut roses.



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