title: Burdock fructooligosaccharide induces fungal resistance in postharvest Kyoho grapes by activating the salicylic acid-dependent pathway and inhibiting browning.
abstract: 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 β-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.
authors.affiliation: School of Life Science, Shandong University, Jinan 250100, China. philbert_sun@yahoo.com
authors.forename: Fei
authors.initials: F
authors.lastname: Sun
authors.forename: Pengying
authors.initials: P
authors.lastname: Zhang
authors.forename: Moran
authors.initials: M
authors.lastname: Guo
authors.forename: Wenqian
authors.initials: W
authors.lastname: Yu
authors.forename: Kaoshan
authors.initials: K
authors.lastname: Chen
mesh_terms: D031170:Arctium / Q000737:chemistry*; D020171:Botrytis / Q000187:drug effects / Q000502:physiology*; D005519:Food Preservation; D005638:Fruit / Q000737:chemistry / Q000235:genetics / Q000276:immunology / Q000382:microbiology; D018506:Gene Expression Regulation, Plant / Q000187:drug effects; D009844:Oligosaccharides / Q000494:pharmacology*; D010935:Plant Diseases / Q000276:immunology / Q000382:microbiology / Q000517:prevention & control*; D010936:Plant Extracts / Q000494:pharmacology*; D010940:Plant Proteins / Q000235:genetics / Q000378:metabolism; D020156:Salicylic Acid / Q000276:immunology*; D027843:Vitis / Q000737:chemistry / Q000235:genetics / Q000276:immunology / Q000382:microbiology*
chemical_list: D009844:Oligosaccharides; D010936:Plant Extracts; D010940:Plant Proteins; C116580:fructooligosaccharide; D020156:Salicylic Acid