Water uptake by snapdragon inflorescences cuts after cold dry storage/ Reidratacao de inflorescencias de boca-de-leao apos o armazenamento refrigerado e seco

• Published in: Ciência rural 2011-03, Vol.41 (3), p.418
• Main Authors: Vieira, Luciana Marques, dos Santos, Joice Simone, Finger, Fernando Luiz, Barbosa, Jose Geraldo, Cecon, Paulo Roberto
• Format: Article
• Language: Spanish
• Subjects: Citric acid; Flowers
• ISSN: 0103-8478

The goal of this research was to evaluate the effect of different solutions on rehydration and longevity of snapdragon inflorescences after dry cold storage. The stems were harvested with 6 to 7 open flowers and after 24 hours in water, they were wrapped in kraft paper, placed in perforated plastic bags and stored at 5°C for 2, 4 or 6 days. After the cold storage period, the stems were placed in jars containing 400mL of (1) deionized water, (2) Flower® (Ecoplanet, SC) or (3) 20g [L.sup.-1] sucrose+150mg [L.sup.-1] citric acid+200g [L.sup.-1] 8-HQC. The solutions were replaced every 48 hours when the base of the stem was cut (2cm). The end of the vase life was determined when the inflorescences presented 50% of abscission or flower wilting. The longevity of the inflorescences differed with the storage time and vase solution used. The longest vase life was obtained when the stems were stored for 2 days and placed in a solution of sucrose+citric acid+8-HQC afterwards. The solution of Flower® allowed gain of fresh mass and increase of relative water content of the petals during the rehydration. The use of deionized water was inefficient in maintaining the inflorescences quality, possible due to the occurrence of vascular occlusion. Key words: longevity, vase solution, Antirrhinum majus. O objetivo deste trabalho foi avaliar o efeito de diferentes solucoes sobre a reidratacao e longevidade de inflorescencias de boca-de-leao apos armazenamento refrigerado a seco. As hastes foram colhidas com seis a sete flores abertas e, apos 24 horas em agua, foram embaladas em papel-craft, acondicionadas em sacos plasticos perfurados e armazenadas a 5°C por dois, quatro ou seis dias. Apos o periodo de armazenamento a frio, as hastes foram colocadas em recipientes contendo 400mL de (1) agua desionizada (controle), (2) solucao de Flower® (Ecoplanet, SC) ou (3) solucao preparada com 20g [L.sup.-1] sacarose + 150mg [L.sup.-1] acido citrico + 200mg [L.sup.-1] de 8-HQC. As solucoes foram trocadas a cada 48 horas, quando foi realizado o corte a 2cm na base da haste. Foi estabelecido o fim da vida de vaso quando as inflorescencias apresentavam 50% de abscisao ou murcha das flores. A longevidade das inflorescencias diferiu com o tempo de armazenamento e com a solucao de vaso utilizada. A maior vida de vaso foi obtida quando as hastes foram armazenadas por dois dias e, posteriormente mantidas em solucao de sacarose+acido citrico+8-HQC. A solucao de Flower® propiciou ganho de massa fresc