Articles
EFFECT OF PRE- AND POSTHARVEST TREATMENTS ON FLOWER LONGEVITY OF ‘ARIANA’ CUT ROSES
Article number
482_11
Pages
83 – 90
Language
Abstract
In order to improve vase life and to reduce abscission of vigorous flower buds and bent-neck of ‘Ariana’ cut roses, grown in plastic houses nearby Bogota, different pre and postharvest treatments were combined: (A) Preharvest: (1) 0.017% CaO as calcium chelate, applied 3, 2, and 1 week before harvest and (2) 8.6 ppm 
-naphtalenacetic acid (ANA), sprayed one week before harvest onto the upper third of the plants; (3) Calcium+ANA, and (4) control. (B) Postharvest: each of the preharvest treatments were treated with (1) Professional Chrysal 0.2% and (2) Florissima 1%. Postharvest handling consisted in 2% of Ca(ClO)2 2 h at 4°C; pulsing with Chrysal or Floriss. 17 h at 2°C; stored 24 h at 2°C and transport simulation for 24 h at 18°C. The evaluation of vase life was done under laboratory conditions.
Flower abscission was not a problem in this study.
The longest vase life was obtained with the treatments Ca+ANA+Chrysal and Ca+ANA+Floriss. with 11.4 and 9.6 days respectively, compared to the control (7.3 days). The individual treatments with Ca or ANA at preharvest (plus Chrysal or Floriss. at postharvest) had the highest percentage of bent-neck at 7 days, with values higher than 63%. Reduction dry weight in the combined treatments (Ca+ANA+Chrysal or Floriss.) was slower in all organs of the cut flower.
Loss of dry matter after 9 days of vase life in petals and in the peduncle of these treatments was only 22% and 33% respectively, compared with 53% and 47% of the control.
The authors suppose that there might be a synergistic effect between the synthetic auxin-naphtalenacetic and CaO which decreases some senescent processes of ‘Ariana’ cut roses.
-naphtalenacetic acid (ANA), sprayed one week before harvest onto the upper third of the plants; (3) Calcium+ANA, and (4) control. (B) Postharvest: each of the preharvest treatments were treated with (1) Professional Chrysal 0.2% and (2) Florissima 1%. Postharvest handling consisted in 2% of Ca(ClO)2 2 h at 4°C; pulsing with Chrysal or Floriss. 17 h at 2°C; stored 24 h at 2°C and transport simulation for 24 h at 18°C. The evaluation of vase life was done under laboratory conditions.Flower abscission was not a problem in this study.
The longest vase life was obtained with the treatments Ca+ANA+Chrysal and Ca+ANA+Floriss. with 11.4 and 9.6 days respectively, compared to the control (7.3 days). The individual treatments with Ca or ANA at preharvest (plus Chrysal or Floriss. at postharvest) had the highest percentage of bent-neck at 7 days, with values higher than 63%. Reduction dry weight in the combined treatments (Ca+ANA+Chrysal or Floriss.) was slower in all organs of the cut flower.
Loss of dry matter after 9 days of vase life in petals and in the peduncle of these treatments was only 22% and 33% respectively, compared with 53% and 47% of the control.
The authors suppose that there might be a synergistic effect between the synthetic auxin
-naphtalenacetic and CaO which decreases some senescent processes of ‘Ariana’ cut roses.
Authors
P. Bolívar, G. Fischer, V.J. Flórez, A. Mora
Keywords
Rosa x hybrida, calcium, α-naphtalenacetic acid, bent-neck, abscission of vigorous flower buds, dry weight
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