Ascorbic acid metabolism: New knowledge on mitigation of aluminum stress in plants
Date
Authors
SOTO CERDA, BRAULIO JORGE
INOSTROZA BLANCHETEAU, CLAUDIO ANDRES
Cárcamo-Fincheira, Paz
Nunes-Nesi, Adriano
Soto-Cerda, Braulio Jorge
Inostroza-Blancheteau, Claudio
Reyes-Díaz, Marjorie M.
INOSTROZA BLANCHETEAU, CLAUDIO ANDRES
Cárcamo-Fincheira, Paz
Nunes-Nesi, Adriano
Soto-Cerda, Braulio Jorge
Inostroza-Blancheteau, Claudio
Reyes-Díaz, Marjorie M.
Authors
Date
Datos de publicación:
10.1016/j.plaphy.2024.109228
Keywords
Al-resistance Mechanism - Ascorbic Acid - Dehydroascorbate - Organic Acids - Oxalate - Oxidative Stress - Aluminum - Ascorbic Acid - Aluminum - Ascorbic Acid - Aluminum - Ascorbic Acid - Drug Effect - Metabolism - Physiological Stress - Plant - Aluminum - Ascorbic Acid - Plants - Stress, Physiological
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Abstract
Ascorbic acid (ASC) is an important antioxidant in plant cells, being the main biosynthesis pathway is L-galactose or Smirnoff-Wheeler. ASC is involved in plant growth and development processes, being a cofactor and regulator of multiple signaling pathways in response to abiotic stresses. Aluminum toxicity is an important stressor under acidic conditions, affecting plant root elongation, triggering ROS induction and accumulation of hydrogen peroxide (H<inf>2</inf>O<inf>2</inf>). To mitigate damage from Al-toxicity, plants have evolved mechanisms to resist stress conditions, such as Al-tolerance and Al-exclusion or avoidance, both strategies related to the forming of non-phytotoxic complexes or bind-chelates among Al and organic molecules like oxalate. Dehydroascorbate (DHA) degradation generates oxalate when ASC is recycled, and dehydroascorbate reductase (DHAR) expression is inhibited. An alternative strategy is ASC regeneration, mainly due to a higher level of DHAR gene expression and low monodehydroascorbate reductase (MDHAR) gene expression. Therefore, studies performed on Fagopyrum esculentum, Nicotiana tabacum, Poncirus trifoliate, and V. corymbosum suggest that ASC is associated with the Al-resistant mechanism, given the observed enhancements in defense mechanisms, including elevated antioxidant capacity and oxalate production. This review examines the potential involvement of ASC metabolism in Al-resistant mechanisms. © 2024 Elsevier B.V., All rights reserved.
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Keywords
Al-resistance Mechanism , Ascorbic Acid , Dehydroascorbate , Organic Acids , Oxalate , Oxidative Stress , Aluminum , Ascorbic Acid , Aluminum , Ascorbic Acid , Aluminum , Ascorbic Acid , Drug Effect , Metabolism , Physiological Stress , Plant , Aluminum , Ascorbic Acid , Plants , Stress, Physiological
Citation
10.1016/j.plaphy.2024.109228