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T1  - Metabolites of 2,3-diketogulonate delay peroxidase action and induce non-enzymic H2O2 generation : Potential roles in the plant cell wall 
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UR  - http://hdl.handle.net/10138/185243 
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A1  - Karkonen, Anna; Dewhirst, Rebecca A.; Mackay, C. Logan; Fry, Stephen C. 
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Y1  - 2017 
LA  - eng 
AB  - A proportion of the plant's L-ascorbate (vitamin C) occurs in the apoplast, where it and its metabolitesmay act as pro-oxidants and anti-oxidants. One ascorbate metabolite is 2,3-dilcetogulonate (DKG), preparations of which can non-enzymically generate H2O2 and delay peroxidase action on aromatic substrates. As DKG itself generates several by-products, we characterised these and their ability to generate H2O2 and delay peroxidase action. DKG preparations rapidly produced a by-product, compound (... 
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KW  - Ascorbate; Dehydroascorbic acid; Diketogulonate; Apoplast; Peroxidase; Hydrogen peroxide; Hydroxyl radical; Plant cell wall; L-ASCORBIC-ACID; PERFORMANCE LIQUID-CHROMATOGRAPHY; VITAMIN-C DEGRADATION; DEHYDROASCORBIC ACID; APOPLASTIC ASCORBATE; HYDROXYL RADICALS; 2,3-DIKETO-L-GULONIC ACID; TRANSFORMATION PRODUCTS; OXIDATIVE-DEGRADATION; ARABIDOPSIS-THALIANA; 1183 Plant biology, microbiology, virology; 415 Other agricultural sciences 
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