Open Access‘Green’ …yet wasting energy?: Mitochondrial respiration in plants
Author(s) -
Anthony L. Moore,
Mary S. Albury,
Paul G. Crichton
Publication year - 2006
Publication title -
the biochemist
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.126
H-Index - 7
eISSN - 1740-1194
pISSN - 0954-982X
DOI - 10.1042/bio02804013
Subject(s) - alternative oxidase , mitochondrion , cyanide , cytochrome c oxidase , respiration , oxidative phosphorylation , inner mitochondrial membrane , biology , bioenergetics , microbiology and biotechnology , oxygen , biochemistry , cytochrome , chemistry , biophysics , cellular respiration , botany , enzyme , inorganic chemistry , organic chemistry
Plant mitochondria are characterized by the presence of both phosphorylating (cytochrome) and non-phosphorylating (alternative) pathways, the activity of which directly affects the efficiency of mitochondrial energy conservation. The cyanide-insensitive AOX (alternative oxidase) is located on the inner surface of the inner membrane, results in the oxidation of ubiquinol and the net reduction of oxygen to water, is non-protonmotive and is considered to be one of the newest members of the di-iron carboxylate group of proteins. In thermogenic tissues it plays a key role in pollination and the maintenance of a warm environment for the flower, whereas in non-thermogenic tissues functions include acting as an energy overflow, part of the oxygen defence mechanism and maintaining plant growth homoeostasis.
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