Review Article
L-Ascorbic Acid: A Multifunctional Molecule Supporting Plant Growth and Development
Table 1
Approaches to increase ascorbic acid content through increasing ascorbate biosynthesis.
| Species | Enzyme | Tissue | Gene source | Fold increase in Asc | Comments | Reference |
| Tobacco | L-Galactose dehydrogenase | Leaves | Arabidopsis | No change | Antisense suppression resulted in lower Asc | [37] | Tobacco | GDP-L-galactose phosphorylase | Leaves | Kiwifruit | 3 | Transient overexpression by agroinfection | [29] | Arabidopsis | GDP-L-galactose phosphorylase | Leaves | Kiwifruit | 4 | Stable transformant | [29] | Tobacco | GDP- L-galactose phosphorylase and GDP-mannose-3′,5′-epimerase | Leaves | Kiwifruit | 7 | Transient overexpression by agroinfection | [29] | Arabidopsis | D-Galacturonic acid reductase | Leaves | Strawberry | 2 to 3 | Enzyme is from the D-galacturonate pathway | [35] | Tobacco | L-Gulono-1,4-lactone oxidase | Leaves | Rat | 7 | No clear evidence that the animal Asc biosynthetic pathway exists in plants | [38] | Lettuce | L-gulono-1,4-lactone oxidase | Leaves | Rat | 4 to 7 | No clear evidence that the animal Asc biosynthetic pathway exists in plants | [38] | Arabidopsis | myo-inositol oxygenase | Leaves | Arabidopsis | 2 to 3 | myo-inositol/D-glucuronate pathway | [39] |
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