Ascorbic Acid and Ozone: Novel Perspectives to Explain an Elusive Relationship

A huge amount of studies highlighted the importance of high ascorbic acid (AA) content in ozone tolerance, yet the relationship between them appears more complex than a simple direct correlation. Sometimes the connection is clear, for example, two mutants defective in the main AA biosynthetic pathwa...

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Bibliographic Details
Published inPlants (Basel) Vol. 8; no. 5; p. 122
Main Authors Bellini, Erika, De Tullio, Mario C
Format Journal Article
LanguageEnglish
Published Switzerland MDPI AG 09.05.2019
MDPI
Subjects
Acids
apoplast
ascorbate redox balance
Ascorbic acid
Cultivars
Epigenetics
Gene expression
hormesis
Hydrogen peroxide
Mutants
Ozone
Review
Signal transduction
Supplements
Tobacco
apoplast
hormesis
ascorbate redox balance
epigenetics
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Summary:A huge amount of studies highlighted the importance of high ascorbic acid (AA) content in ozone tolerance, yet the relationship between them appears more complex than a simple direct correlation. Sometimes the connection is clear, for example, two mutants defective in the main AA biosynthetic pathway ( mutants) were identified by means of their ozone sensitivity. However, some low-AA containing mutants are relatively tolerant, suggesting that AA location/availability could be more relevant than total content. A clear distinction should also be made between ozone tolerance obtained when AA content is increased by experimental supplementation (exogenous AA), and the physiological role of plant-synthesized AA (endogenous AA), whose amount is apparently subjected to tight regulation. Recent findings about the role of AA in signal transduction and epigenetic regulation of gene expression open new routes to further research.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
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ObjectType-Review-1
ISSN:2223-7747
2223-7747
DOI:10.3390/plants8050122