Journal
FOOD CHEMISTRY
Volume 138, Issue 1, Pages 539-546Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2012.10.058
Keywords
Burdock fructooligosaccharide; Postharvest fruit; Kyoho grapes; Natural elicitor; Salicylic acid-dependent signalling pathway
Funding
- National High Technology Research and Development Program of China [2007AA10Z334]
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Burdock fructooligosaccharide (BFO) is a natural elicitor from Arcitum lappa. The effects of BFO in controlling postharvest disease in grape, apple, banana, kiwi, citrus, strawberry, and pear were investigated. The disease index, decay percentage, and area under the disease progress curve indicated that BFO has general control effects on postharvest disease of fruits. Kyoho grapes were studied to elucidate the mechanism of BFO in boosting the resistance of grapes to Botrytis cinerea infection. BFO treatment induced upregulation of the npr1, pr1, pal, and sts genes, and inhibited the total phenol content decrease, which activated chitinase and beta-1,3-glucanase. These results indicated that the salicylic acid-dependent signalling pathway was induced. The delayed colour change and peroxidase and polyphenoloxidase activity suggested that BFO delayed grape browning. The reduced respiration rate, weight loss, and titratable acidity prolonged the shelf life of postharvest grapes. BFO is a promising elicitor in postharvest disease control. (C) 2012 Elsevier Ltd. All rights reserved.
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