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Phytochrome‐mediated regulation of plant respiration and photorespiration
Author(s) -
IGAMBERDIEV ABIR U.,
EPRINTSEV ALEXANDER T.,
FEDORIN DMITRY N.,
POPOV VASILY N.
Publication year - 2014
Publication title -
plant, cell and environment
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.646
H-Index - 200
eISSN - 1365-3040
pISSN - 0140-7791
DOI - 10.1111/pce.12155
Subject(s) - alternative oxidase , photorespiration , biochemistry , citric acid cycle , biology , succinate dehydrogenase , photosynthesis , pyruvate dehydrogenase complex , cytochrome c oxidase , fumarase , phytochrome , respiratory chain , mitochondrion , enzyme , botany , red light
The expression of genes encoding various enzymes participating in photosynthetic and respiratory metabolism is regulated by light via the phytochrome system. While many photosynthetic, photorespiratory and some respiratory enzymes, such as the rotenone‐insensitive NADH and NADPH dehydrogenases and the alternative oxidase, are stimulated by light, succinate dehydrogenase, subunits of the pyruvate dehydrogenase complex, cytochrome oxidase and fumarase are inhibited via the phytochrome mechanism. The effect of light, therefore, imposes limitations on the tricarboxylic acid cycle and on the mitochondrial electron transport coupled to ATP synthesis, while the non‐coupled pathways become activated. Phytochrome‐mediated regulation of gene expression also creates characteristic distribution patterns of photosynthetic, photorespiratory and respiratory enzymes across the leaf generating different populations of mitochondria, either enriched by glycine decarboxylase (in the upper part) or by succinate dehydrogenase (in the bottom part of the leaf).