Adaptive Evolution in Plant Photosystems
Author Information
Author(s): Robbins Elizabeth H J, Kelly Steven
Primary Institution: University of Oxford
Hypothesis
Are the photosystem genes in angiosperms undergoing adaptive evolution?
Conclusion
The study reveals that many photosystem genes in angiosperms show signs of adaptive evolution, particularly affecting the D1 protein's interaction with the photosystem.
Supporting Evidence
- 7% of residues in the photosystems show signs of adaptive evolution.
- 54% of amino acid substitutions were recurrent, indicating positive selection.
- Adaptive changes were found to destabilize the interaction between PSII and its D1 subunit.
Takeaway
Plants have special parts called photosystems that help them turn sunlight into energy. This study found that these parts are changing over time to work better.
Methodology
The study analyzed the molecular evolution of plastid-encoded photosystem genes across 773 angiosperm species, focusing on adaptive changes at the amino acid level.
Limitations
The study primarily focuses on angiosperms, which may limit the generalizability of findings to other plant lineages.
Statistical Information
P-Value
p<0.001
Statistical Significance
p<0.001
Digital Object Identifier (DOI)
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