Premium
Balancing protection and efficiency in the regulation of photosynthetic electron transport across plant evolution
Author(s) -
Alboresi Alessandro,
Storti Mattia,
Morosinotto Tomas
Publication year - 2019
Publication title -
new phytologist
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.742
H-Index - 244
eISSN - 1469-8137
pISSN - 0028-646X
DOI - 10.1111/nph.15372
Subject(s) - photosynthesis , electron transport chain , photosystem ii , photosystem i , biology , photosystem , algae , cyanobacteria , botany , biophysics , genetics , bacteria
ContentsSummary 105 I. Introduction 105 II. Diversity of molecular mechanisms for regulation ofphotosynthetic electron transport 106 III. Role of FLVs in the regulation of photosynthesis in eukaryotes 107 IV. Why were FLVs lost in angiosperms? 108 V. Conclusions 108Acknowledgements 109References 109Summary 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 ( FLV s) 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.