Tratamento pós-colheita visando a longevidade floral de gladíolos (Gladiolus x hortulanus)

• Autor(a) principal: Cásares Wong, María Carolina [UNESP]
• Data de Publicação: 2014
• Tipo de documento: Tese
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://hdl.handle.net/11449/122225
• topic: Flores; Gladiolo; Plantas - Conservação; Calcio; Flores - Qualidade; Sacarose; Pós-colheita; Calcium

Flowers and ornamental plants potentially have the greatest economic value in horticulture products, and they are the most perishable too. Loss of value in cut flowers is consequence of flower senescence, deterioration caused by pathogens and loss of turgor of products due to negative water balance. Gladiolus or palm-of- Santa-Rita (Gladiolus x hortulanus) is a well-known and appreciated inflorescence, but the short vase life and poor bud opening when harvested immature, limited demand. Although there are postharvest techniques that may help in solving these issues, cut flowers physiology research have been focused on climateric species, in detriment of non-climateric, as the gladiolus. The objective of this study was to evaluate formulations for pulsing and holding solutions to maintain longevity and postharvest quality of gladiolus. In pulsing treatment, gladiolus 'White Goddess' cut inflorescences were treated with sucrose (0, 10, 15 and 20%) for 24 hours. Gladiolus 'White Friendship' cut inflorescences were placed on holding solutions containing different concentrations of germicides (citric acid, 8-hydroxyquinoline - 8HQ, sodium dichloroisocyanurate dehydrate - NaDCC, and polymeric biguanide - PB), sucrose (0, 2, 4 and 8%) and calcium chloride (CaCl2 0.1 and 0.2%). Experimental design was completely randomized with factorial arrangement with three replicates and three inflorescences per repetition. Evaluations were made every three days and according to tested solution, it was considered the following variables: vase life, fresh mass, solution turbidity, respiration, inflorescence postharvest development (showing-color buds, fully-open flowers, wilting flowers and unopened buds), water relations (solution uptake, water loss and water balance), carbohydrate content (soluble and reducing) and membrane stability index. Initial volume (500 mL) of holding solutions was completed on each valuation day. Data were subjected to ...