ศูนย์นวัตกรรมเทคโนโลยีหลังการเก็บเกี่ยว

Effects of surfactants on the longevity of dry-stored cut flowering stems of rose, Bouvardia, and Astilbe.

Doorn, W. G. van; Perik, R. R. J.; Belde, P. J. M.;

Postharvest Biology and Technology Year: 1993 Vol: 3 Issue: 1 Pages: 69-76 Ref: 15 ref.

1993

บทคัดย่อ

When cut and placed in water for 48 h at 20 deg C the longevity of flowering stems of roses (cv. Sonia), Bouvardia (cv. Artemis Jowhite) and Astilbe (cv. Cattleya) was 12.1 plus or minus 2.2, 7.8 plus or minus 3.0 and 6.6 plus or minus 2.1 days, respectively. When placed in water for 24 h, then stored dry for 24 h (at 20 deg and 60% RH) and replaced in water the rose flowers showed early wilting and longevity was reduced to 4.3 plus or minus 1.8 days. After dry storage and replacement in water the 2 other species did not regain turgor. Inclusion of a surfactant such as Tween-80, Triton X-100 or Nonoxynol-8.5 (as Agral-LN) in the 24-h water treatment prior to dry storage resulted in rapid recovery of turgidity in all species after dry storage. Pulse treatment with Tween-20 and Tween-80, however, resulted in visible leaf damage and in leaf abscission during vase life. Damage occurred at 0.10 mg/litre, which was just high enough to restore turgidity. In contrast, Triton X-100 and Nonoxynol-8.5 did

not produce visible toxicity symptoms at effective concentrations. Treatment with Nonoxynol-8.5 prior to dry storage resulted in flower longevity similar to the controls stored in water for 48 h. In Bouvardia, the surfactant-treated (and dry-stored) flowers had a longer vase life than those kept in water for 48 h prior to assessment of vase life.