Effect of mitochondrial ascorbic acid synthesis on photosynthesis.

M E Senn, G E Gergoff Grozeff, M L Alegre, F Barrile, M C De Tullio, C G Bartoli

Journal: Plant physiology and biochemistry : PPB 2017;104():29-35

PMID: 27010742

Full Text on Elsevier Science View on PubMed

Abstract

Ascorbic acid (AA) is synthesized in plant mitochondria through the oxidation of l-galactono-1,4-lactone (l-GalL) and then distributed to different cell compartments. AA-deficient Arabidopsis thaliana mutants (vtc2) and exogenous applications of l-GalL were used to generate plants with different AA content in their leaves. This experimental approach allows determining specific AA-dependent effects on carbon metabolism. No differences in O2 uptake, malic and citric acid and NADH content suggest that AA synthesis or accumulation did not affect mitochondrial activity; however, l-GalL treatment increased CO2 assimilation and photosynthetic electron transport rate in vtc2 (but not wt) leaves demonstrating a stimulation of photosynthesis after l-GalL treatment. Increased CO2 assimilation correlated with increased leaf stomatal conductance observed in l-GalL-treated vtc2 plants.

Address: Instituto de Fisiología Vegetal (INFIVE), Facultades de Ciencias Agrarias y Forestales y de Ciencias Naturales y Museo, Universidad Nacional de La Plata, CCT-CONICET La Plata, cc 327, 1900, La Plata, Argentina.; Department of Earth and Environmental Sciences, Università degli Studi di Bari, Italy.; Instituto de Fisiología Vegetal (INFIVE), Facultades de Ciencias Agrarias y Forestales y de Ciencias Naturales y Museo, Universidad Nacional de La Plata, CCT-CONICET La Plata, cc 327, 1900, La Plata, Argentina. Electronic address: [email protected].

DOI: 10.1016/j.plaphy.2016.03.012

Link outs

Free resources

Medical:

https://medlineplus.gov/vitaminc.html

Other Literature Sources:

https://scite.ai/reports/27010742

Subscription / membership required

Full Text Sources:

https://linkinghub.elsevier.com/retrieve/pii/S0981...

Molecular Biology Databases:

https://www.arabidopsis.org/publication?key=501768...

MeSH Terms: Arabidopsis, Ascorbic Acid, Cell Respiration, Dehydroascorbic Acid, Glutathione, Lactones, Mitochondria, Photosynthesis, Plant Stomata, Pyridines, Ribulose-Bisphosphate Carboxylase, Sugar Acids