期刊
NEW PHYTOLOGIST
卷 221, 期 1, 页码 105-109出版社
WILEY
DOI: 10.1111/nph.15372
关键词
evolution; flavodiiron proteins (FLVs); photoprotection; photosynthesis; Physcomitrella patens
资金
- Universita degli Studi di Padova, Dipartimento di Biologia [BIRD173749/17]
- European Research Council (BIOLEAP grant) [309485]
- European Research Council (ERC) [309485] Funding Source: European Research Council (ERC)
Photosynthetic electron transport requires continuous modulation to maintain the balance between light availability and metabolic demands. Multiple mechanisms for the regulation of electron transport have been identified and are unevenly distributed among photosynthetic organisms. Flavodiiron proteins (FLVs) influence photosynthetic electron transport by accepting electrons downstream of photosystem I to reduce oxygen to water. FLV activity has been demonstrated in cyanobacteria, green algae and mosses to be important in avoiding photosystem I overreduction upon changes in light intensity. FLV-encoding sequences were nevertheless lost during evolution by angiosperms, suggesting that these plants increased the efficiency of other mechanisms capable of accepting electrons from photosystem I, making the FLV activity for protection from overreduction superfluous or even detrimental for photosynthetic efficiency.
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