PJB-2021-517
Ascorbate Peroxidase: Structure, functions and diverse functions in plants
Tayyaba Akhtar
Abstract
Ascorbate peroxidase is the member of the family of heme-containing peroxidases which catalyze the H₂O₂-dependent oxidation of variety of distinct organic substrates in the biological system. Drought, extreme heat and salinity which are the abiotic factors severely harm the plant’s reproduction and survival. Ascorbate peroxidase pathways play a crucial role in converting H2O2 to water by using ascorbate as an unusual electron donating compound. Multiple isoforms of ascorbate peroxidase like cytosol, peroxisome, mitochondria and chloroplasts found in contrasting intracellular sections. APX genes expression is controlled with regards to abiotic and biotic stresses additionally plant growth. The APX reactions are immediately concerned in the shelter of plant cells if severe environmental circumstances. Moreover, APX genes of variant plants indicated adaptations in physiology, development antioxidant metabolism showing the participation of enzymes involvement in usual plant growth. Key words: Ascorbate peroxidase, Abiotic stress, Antioxidant, Reactive oxygen species, Environmental conditions, transgenic plants.
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