DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Metabolites of 2,3-diketogulonate delay peroxidase action and induce non-enzymic H2O2 generation: Potential roles in the plant cell wall

Journal Article · · Archives of Biochemistry and Biophysics
 [1]; ORCiD logo [2];  [3];  [3]
  1. Univ. of Helsinki (Finland); Univ. of Edinburgh (United Kingdom)
  2. Univ. of Edinburgh (United Kingdom); Univ. of Exeter (United Kingdom)
  3. Univ. of Edinburgh (United Kingdom)

A proportion of the plant's l-ascorbate (vitamin C) occurs in the apoplast, where it and its metabolites may act as pro-oxidants and anti-oxidants. One ascorbate metabolite is 2,3-diketogulonate (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 (1), with λmax 271 and 251 nm at neutral and acidic pH respectively. On HPLC, (1) co-eluted with the major H2O2-generating and peroxidase-delaying principle. Compound (1) was slowly destroyed by ascorbate oxidase, and was less stable at pH 6 than at pH 1. Electrophoresis of an HPLC-enriched preparation of (1) suggested a strongly acidic (pKa ≈ 2.3) compound. Mass spectrometry suggested that un-ionised (1) has the formula C6H6O5, i.e. it is a reduction product of DKG (C6H8O7). In conclusion, compound (1) is the major H2O2-generating, peroxidase-delaying principle formed non-enzymically from DKG in the pathway ascorbate → dehydroascorbic acid → DKG → (1). We hypothesise that (1) generates apoplastic H2O2 (and consequently hydroxyl radicals) and delays cell-wall crosslinking - both these effects favouring wall loosening, and possibly playing a role in pathogen defence.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1567079
Journal Information:
Archives of Biochemistry and Biophysics, Vol. 620, Issue C; ISSN 0003-9861
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

References (48)

Pectic polysaccharides are attacked by hydroxyl radicals in ripening fruit: evidence from a fluorescent fingerprinting method journal February 2016
Early signalling events in the apoplastic oxidative burst in suspension cultured French bean cells involve cAMP and Ca 2+ journal July 2001
Re-evaluating the role of ascorbic acid and phenolic glycosides in ozone scavenging in the leaf apoplast of Arabidopsis thaliana L.: Ozone effects on leaf apoplast chemistry journal March 2012
Ozone tolerance in snap bean is associated with elevated ascorbic acid in the leaf apoplast journal March 2002
Oxidation of Ascorbic Acid by Oxygen with Cupric Ion as Catalyst journal August 1940
Dehydroascorbic acid undergoes hydrolysis on solubilization which can be reversed with mercaptoethanol journal February 1996
Solubilisation of tomato fruit pectins by ascorbate: a possible non-enzymic mechanism of fruit softening journal October 2003
Predicting leaf-level fluxes of O3 and NO2: the relative roles of diffusion and biochemical processes journal September 2006
Altered apoplastic ascorbate redox state in tobacco plants via ascorbate oxidase overexpression results in delayed dark-induced senescence in detached leaves journal December 2013
Oxidative scission of plant cell wall polysaccharides by ascorbate-induced hydroxyl radicals journal June 1998
Fingerprinting of polysaccharides attacked by hydroxyl radicals in vitro and in the cell walls of ripening pear fruit journal July 2001
Hydroperoxide Assay with the Ferric–Xylenol Orange Complex journal September 1999
Vitamin C degradation in plant cells via enzymatic hydrolysis of 4-O-oxalyl-l-threonate journal December 2004
Apoplastic degradation of ascorbate: Novel enzymes and metabolites permeating the plant cell wall journal March 2005
Spontaneous Conversion ofl-Dehydroascorbic Acid tol-Ascorbic Acid andl-Erythroascorbic Acid journal July 1998
Enzymatic Studies on Ascorbic Acid Catabolism in Animals journal February 1962
The Oxidative Degradation of ʟ-Ascorbic Acid via an α-Ketoaldehyde journal December 1982
Effect of ascorbate and its oxidation products on H2O2 production in cell-suspension cultures of Picea abies and in the absence of cells journal May 2006
Reactive oxygen species in cell wall metabolism and development in plants journal April 2015
On the mechanism of apoplastic H2O2 production during lignin formation and elicitation in cultured spruce cells—peroxidases after elicitation journal June 2009
Expansion of transgenic tobacco protoplasts expressing pumpkin ascorbate oxidase is more rapid than that of wild-type protoplasts journal May 2000
Analysis of the Transformation Products of Dehydro-L-Ascorbic Acid by Ion-Pairing High-Performance Liquid Chromatography journal October 1993
Analysis of ascorbic acid, dehydroascorbic acid, and transformation products by ion-pairing high-performance liquid chromatography with multiwavelength ultraviolet and electrochemical detection book January 1997
Effects of 2,3-Diketo-L-gulonic Acid on the Oxidation of Yolk Lipoprotein journal January 2001
Expression of Ascorbic Acid Oxidase in Zucchini Squash ( Cucurbita pepo L.) journal May 1991
Possible Formation of Dehydro- L -ascorbic Acid from 2,3-Diketo- L -gulonic Acid in an Aqueous Solution journal January 1998
Reaction of Alloxan with Ascorbic Acid journal October 1955
Vitamin C Degradation Products and Pathways in the Human Lens journal October 2011
Identification of 3,4-Dihydroxy-2-oxo-butanal (L-threosone) as an Intermediate Compound in Oxidative Degradation of Dehydro-L-ascorbic Acid and 2,3-Diketo-L-gulonic Acid in a Deuterium Oxide Phosphate Buffer journal January 2001
The Influence of Apoplastic Ascorbate on the Activities of Cell Wall-Associated Peroxidase and NADH Oxidase in Needles of Norway Spruce (Picea abies L.) journal January 1994
Oxidation of dehydroascorbic acid and 2,3-diketogulonate under plant apoplastic conditions journal March 2012
Alternative pathways of dehydroascorbic acid degradation in vitro and in plant cell cultures: novel insights into vitamin C catabolism journal November 2011
Apoplastic ascorbate metabolism and its role in the regulation of cell signalling journal August 2003
Ascorbate Oxidase-Dependent Changes in the Redox State of the Apoplast Modulate Gene Transcript Accumulation Leading to Modified Hormone Signaling and Orchestration of Defense Processes in Tobacco   journal April 2006
Over-expression of ascorbate oxidase in the apoplast of transgenic tobacco results in altered ascorbate and glutathione redox states and increased sensitivity to ozone journal April 2003
The Relationship between Leaf Rolling and Ascorbate-Glutathione Cycle Enzymes in Apoplastic and Symplastic Areas of Ctenanthe setosa Subjected to Drought Stress journal January 2009
Scission of polysaccharides by peroxidase-generated hydroxyl radicals journal March 2000
The non-oxidative degradation of ascorbic acid at physiological conditions journal April 2000
Ascorbate deficiency influences the leaf cell wall glycoproteome in A rabidopsis thaliana journal February 2014
Behavior of 3,4-endiol form of 2,3-diketo-gulono-.DELTA.-lactone formed from dehydro-L-ascorbic acid in deoxygenated and neutral solution. journal January 1989
Effects of active oxygen scavengers on the peroxidation of linoleic acid catalyzed by dehydro-L-ascorbic acid or its degradation products. journal January 1988
Preparation and Characterization of a 345 nm Absorbing Reductant Derived from Dehydro-L-Ascorbic Acid journal September 1990
Diurnal variation of apoplastic ascorbate in winter wheat leaves in relation to ozone detoxification journal December 2015
Stability and transformation of products formed from dimeric dehydroascorbic acid at low pH journal December 2011
Ascorbic acid oxidase and ascorbic acid oxygenase of Myrothecium verrucaria journal June 1965
ROS signaling loops — production, perception, regulation journal October 2013
Simultaneous Determination of Ascorbic acid and Dehydroascorbic acid by high Performance Liquid Chromatography journal January 1991
Degradation of Ascorbic Acid in Aqueous Solution journal December 1998

Cited By (6)

Metabolomic analysis of date palm seedlings exposed to salinity and silicon treatments journal September 2019
Determination of cellular vitamin C dynamics by HPLC-DAD journal January 2019
Hydrogen peroxide metabolism and functions in plants journal October 2018
Regulation of Ascorbate-Glutathione Pathway in Mitigating Oxidative Damage in Plants under Abiotic Stress journal September 2019
The oxidation of dehydroascorbic acid and 2,3-diketogulonate by distinct reactive oxygen species journal November 2018
Ascorbate Oxidase in Plant Growth, Development, and Stress Tolerance book January 2017