Chitosan applications pre- or postharvest prolong raspberry shelf-life quality

Autor(es)

Tezotto-Uliana, Jaqueline Visioni ^[1] ; Fargoni, Gabriela Possati ^[1] ; Geerdink, Gabriela Maria ^[1] ; Kluge, Ricardo Alfredo ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Escola Super Agr Luiz de Queiroz, BR-13418900 Piracicaba, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Postharvest Biology and Technology; v. 91, p. 72-77, MAY 2014.
• Citações Web of Science: 32

Resumo

Raspberries are fruit with high metabolism that makes them very perishable, impairing their storage and shelf-life. Chitosan coatings have the potential to improve their postharvest life by reducing water loss, respiration rate and decay incidence. The purpose of this work was to study the effect of different concentrations of chitosan, applied pre- or postharvest, on the retention of quality attributes of fresh raspberries. The chitosan concentrations tested were 0 (control), 0.5, 1.0 or 2.0%. The postharvest treatment was applied immediately after harvest, dipping the fruit in the solutions for 5 min. The pre-harvest treatment was done with one hand-spray application per week for three weeks, starting when the fruit were just turning pink. In both experiments the fruit were stored at 0 degrees C and 90% RH. Pre- or postharvest use of chitosan at 1 or 2% was effective in maintaining titratable acidity and retarding respiration and ethylene production, weight loss and decay incidence. Application by both means resulted in the highest chitosan concentrations accelerating a reduction of ascorbic acid contents. Firmness was maintained only when the fruit were treated pre-harvest at 2%. Thus, application of chitosan at 1 or 2% postharvest and 2% pre-harvest was able to retain key raspberry quality attributes for 15 and 12 days, respectively. (C) 2014 Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 10/02601-3 - Desenvolvimento de métodos de conservação pós-colheita de framboesa "in natura"
• Beneficiário: Jaqueline Visioni Tezotto-Uliana
• Modalidade de apoio: Bolsas no Brasil - Mestrado