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Deep Evolutionary Comparison of Gene Expression Identifies Parallel Recruitment of -Factors in Two Independent Origins of C Photosynthesis


C4 photosynthesis is one of the most successful and widespread examples of convergent evolution; the first C4 plant evolved long after the extinction of the dinosaurs, yet C4 species now account for ∼30% of primary productivity on earth. Compared with ancestral C3 photosynthesis, the C4 pathway allows faster rates of growth, and thus international efforts have been mustered to introduce advantageous C4 traits into important C3 crops to increase their yield. However, the transition from C3 to C4 involves complex alterations to leaf anatomy and biochemistry. Despite these multiple changes, C4 photosynthesis has evolved independently at least 60 times. Through DNA and RNA sequencing we are beginning define a catalog of genes associated with C3 or C4 photosynthesis. However, we know little about how these genes act co-ordinately to bring about the convergent C4 phenotype. In this work we develop a new informatics framework to reveal that two independent lineages of C4 plants have co-opted the same regulators of gene expression to generate the C4 leaf. Our findings provide a new paradigm for investigating the genetics of convergent traits and the origin of convergent phenotypes. Moreover, they reveal significant new insight into the regulatory mechanisms governing the origins of C4 photosynthesis.


Vyšlo v časopise: Deep Evolutionary Comparison of Gene Expression Identifies Parallel Recruitment of -Factors in Two Independent Origins of C Photosynthesis. PLoS Genet 10(6): e32767. doi:10.1371/journal.pgen.1004365
Kategorie: Research Article
prolekare.web.journal.doi_sk: https://doi.org/10.1371/journal.pgen.1004365

Souhrn

C4 photosynthesis is one of the most successful and widespread examples of convergent evolution; the first C4 plant evolved long after the extinction of the dinosaurs, yet C4 species now account for ∼30% of primary productivity on earth. Compared with ancestral C3 photosynthesis, the C4 pathway allows faster rates of growth, and thus international efforts have been mustered to introduce advantageous C4 traits into important C3 crops to increase their yield. However, the transition from C3 to C4 involves complex alterations to leaf anatomy and biochemistry. Despite these multiple changes, C4 photosynthesis has evolved independently at least 60 times. Through DNA and RNA sequencing we are beginning define a catalog of genes associated with C3 or C4 photosynthesis. However, we know little about how these genes act co-ordinately to bring about the convergent C4 phenotype. In this work we develop a new informatics framework to reveal that two independent lineages of C4 plants have co-opted the same regulators of gene expression to generate the C4 leaf. Our findings provide a new paradigm for investigating the genetics of convergent traits and the origin of convergent phenotypes. Moreover, they reveal significant new insight into the regulatory mechanisms governing the origins of C4 photosynthesis.


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Genetika Reprodukčná medicína

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PLOS Genetics


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