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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Respiratory activity and pigment metabolism in fresh-cut beet roots treated with citric acid

Texto completo
Autor(es):
Kluge, Ricardo A. [1] ; Vitti, Maria Carolina D. [1] ; Sasaki, Fabiana F. [1] ; Jacomino, Angelo P. [2] ; Moretti, Celso L. [3]
Número total de Autores: 5
Afiliação do(s) autor(es):
[1] USP, ESALQ, Depto Ciencias Biol, BR-13418900 Piracicaba, SP - Brazil
[2] USP, ESALQ, Depto Prod Vegetal, BR-13418900 Piracicaba, SP - Brazil
[3] Embrapa Hortal, BR-70359970 Brasilia, DF - Brazil
Número total de Afiliações: 3
Tipo de documento: Artigo Científico
Fonte: Horticultura Brasileira; v. 26, n. 4, p. 520-523, OCT-DEC 2008.
Citações Web of Science: 1
Resumo

Beet roots cv. Early Wonder were graded for firmness, color and size, and were peeled inside a cold room (10 degrees C). Roots were then shredded (2 mm thick), sanitized for 6 minutes (NaClO/200 mg L(-1)), rinsed and centrifuged. Fresh-cut beet roots were then treated for 5 minutes with citric acid in the Following concentrations: 0 (control), 500; 1,000; 1,500 and 2,000 mg L(-1). The material was centrifuged again, placed in trays, wrapped with PVC plastic film, and stored at 5 degrees C and 85-90% HR for 10 days. Every two days, treatments were analyzed for respiratory activity and betacyanin and betaxanthin contents. The application of citric acid caused the reduction of respiratory rate in the fresh-cut tissue. In the second day of storage, control showed the highest respiratory activity among treatments, reaching around 77 mL CO(2) kg(-1) h(-1). Citric acid solution dips in a concentration higher than 500 mg L(-1) contributed to a decrease in respiratory activity and no peak in CO(2) evolution was observed. There were significant differences among all treatments during the storage period for the contents of betacyanin, which were around 40; 45; 48; 51 and 55 mg 100 g(-1) for the fresh-cut material treated with 0; 500; 1,000; 1,500 and 2,000 mg L(-1) of citric acid, respectively. Also, levels of betaxanthin were around 25; 29; 33; 35 and 39 mg 100 g(-1) for the material treated with 0, 500; 1,000 1,500 and 2,000 mg L(-1) of citric acid, respectively. The application of citric acid after minimal processing apparently have the ability to reduce respiratory rate and the degradation of pigments, which contributes to extend the shelf life of the fresh-cut product. (AU)

Processo FAPESP: 01/00750-2 - Processamento mínimo de beterraba (Beta vulgaris)
Beneficiário:Ricardo Alfredo Kluge
Linha de fomento: Auxílio à Pesquisa - Regular