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Role of mitochondrial alternative oxidase in the regulation of cellular homeostasis during development of photosynthetic function in greening leaves
Author(s) -
Garmash E. V.
Publication year - 2021
Publication title -
plant biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.871
H-Index - 87
eISSN - 1438-8677
pISSN - 1435-8603
DOI - 10.1111/plb.13217
Subject(s) - alternative oxidase , greening , biology , etiolation , chloroplast , photosynthesis , mitochondrion , electron transport chain , biochemistry , microbiology and biotechnology , botany , enzyme , ecology , gene
Here, recent publications on the role of mitochondrial non‐phosphorylating pathways (NPhPs) in the electron transport chain during the de‐etiolation of wheat leaves are reviewed. Among NPhPs, the alternative oxidase (AOX) pathway is the most effective pathway in maintaining cellular redox and energy balance, especially under stress conditions, including light stress. AOX is considered to dissipate excess reductants produced in the chloroplasts, and thereby prevent photooxidation. However, when etiolated wheat plants were exposed to a physiologically relevant light level, AOX was rapidly induced and increased, although the etioplasts did not produce excess reductants and have their own strong photoprotective mechanisms. The present study provides further insights into the role of AOX in greening cells and highlights the importance of AOX in the integration of cellular signalling pathways.