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- Title
Ascorbic Acid and Ozone: Novel Perspectives to Explain an Elusive Relationship.
- Authors
Bellini, Erika; De Tullio, Mario C.
- Abstract
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 Arabidopsis mutants defective in the main AA biosynthetic pathway (vtc 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.
- Subjects
PHYSIOLOGICAL effects of vitamin C; EFFECT of ozone on plants; ARABIDOPSIS; PLANT cellular signal transduction; GENETIC regulation in plants; PLANT epigenetics
- Publication
Plants (2223-7747), 2019, Vol 8, Issue 5, p122
- ISSN
2223-7747
- Publication type
Article
- DOI
10.3390/plants8050122