L-Ascorbic Acid: A Multifunctional Molecule Supporting Plant Growth and Development

Table 3

Approaches to increase ascorbic acid content or redox state through increasing MDAR expression.

Species	Tissue	Subcellular location	Gene source	Fold increase in Asc	Fold increase in Asc redox state	Consequence of increasing MDAR expression	Reference
Tobacco	Leaves	Cytosol	Arabidopsis	1.2	1.3	No change in aluminum tolerance	[183]
Tobacco	Leaves	Cytosol	Arabidopsis	2.2	2.2 to 3	Enhanced tolerance to ozone and salt stress	[191]
Arabidopsis	Leaves	Chloroplast	Tomato	1.2	2.2	Enhanced tolerance to low- and high-temperature stress; enhanced tolerance to oxidative stress	[192]
Tomato	Fruit	Cytosol	Tomato	No change	Not reported	No increase in Asc content in leaves or green fruit	[189]