Skip to main page content
Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
Review
, 525 (2), 181-94

Plant Catalases: Peroxisomal Redox Guardians

Affiliations
Review

Plant Catalases: Peroxisomal Redox Guardians

Amna Mhamdi et al. Arch Biochem Biophys.

Abstract

While genomics and post-genomics studies have revealed that plant cell redox state is controlled by a complex genetic network, available data mean that catalase must continue to be counted among the most important of antioxidative enzymes. Plants species analyzed to date contain three catalase genes, and comparison of expression patterns and information from studies on mutants suggests that the encoded proteins have relatively specific roles in determining accumulation of H(2)O(2) produced through various metabolic pathways. This review provides an update on the different catalases and discusses their established or likely physiological functions. Particular attention is paid to regulation of catalase expression and activity, intracellular trafficking of the protein from cytosol to peroxisome, and the integration of catalase function into the peroxisomal antioxidative network. We discuss how plants deficient in catalase are not only key tools to identify catalase functions, but are also generating new insight into H(2)O(2) signalling in plants and the potential importance of peroxisomal and other intracellular processes in this signalling.

Similar articles

See all similar articles

Cited by 44 PubMed Central articles

See all "Cited by" articles

MeSH terms

LinkOut - more resources

Feedback