JOURNAL ARTICLE

Physiological function and regulation of ascorbate peroxidase isoforms.

  • Published In: Journal of Experimental Botany, 2024, v. 75, n. 9. P. 2700 1 of 3

  • Database: Academic Search Ultimate 2 of 3

  • Authored By: Yoshimura, Kazuya; Ishikawa, Takahiro 3 of 3

Abstract

This article focuses on ascorbate peroxidase (APX), a plant-specific enzyme that reduces hydrogen peroxide (H₂O₂) to water using ascorbate as an electron donor, playing a central role in the ascorbate–glutathione cycle across various plant organelles. It details the physiological functions, regulation, and evolution of APX isoforms, particularly chloroplastic (tAPX and sAPX) and cytosolic forms, emphasizing their roles in reactive oxygen species (ROS) metabolism, redox signaling, and plant stress responses. The review highlights the distinct gene expression mechanisms, including alternative splicing for chloroplastic APX isoforms, and post-translational modifications regulating cytosolic APX activity. It also discusses the interplay of APX isoforms with other antioxidant systems and their significance in plant adaptation to environmental stresses.

Additional Information

  • Source:Journal of Experimental Botany. 2024/05, Vol. 75, Issue 9, p2700
  • Document Type:Article
  • Subject Area:Anatomy and Physiology
  • Publication Date:2024
  • ISSN:0022-0957
  • DOI:10.1093/jxb/erae061
  • Accession Number:177084509
  • Copyright Statement:Copyright of Journal of Experimental Botany is the property of Oxford University Press / USA and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

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