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2 results for “Alloteropsis semialata”
Alloteropsis semialata as a study system for C4 evolution in grasses
<p><em>Background</em></p> <p>Numerous groups of plants have adapted to CO<sub>2</sub> limitations by independently evolving C<sub>4</sub> photosynthesis. This trait relies on concerted changes in anatomy and biochemistry to concentrate CO<sub>2</sub> within the leaf and thereby boost productivity in tropical conditions. The ecological and economical importance of C4 photosynthesis has motivated intense research, often relying on comparisons between distantly related C<sub>4</sub> and non-C<sub>4</sub> plants. The photosynthetic type is fixed in most species, with the notable exception of the grass <em>Alloteropsis</em> <em>semialata</em>. This species includes populations exhibiting the ancestral C<sub>3</sub> state in southern Africa, intermediate C<sub>3</sub>+C<sub>4</sub> populations in the Zambezian region and C<sub>4</sub> populations spread around the paleotropics. </p> <p><em>Scope</em></p> <p>We compile here the knowledge on the distribution and history of <em>Alloteropsis</em> as a whole and discuss how this has furthered our understanding of C<sub>4</sub> evolution. We further generate a chromosome-level reference genome for a C<sub>3</sub> individual and compare the genomic architecture to that of a C<sub>4</sub> accession. </p> <p><em>Conclusions</em></p> <p><em>Alloteropsis</em> <em>semialata</em> represents one of the best systems to investigate the evolution of C<sub>4</sub> photosynthesis as the genetic and phenotypic variation provides a fertile ground for comparative and population-level studies. Initial comparative genomics show the C<sub>3</sub> and C<sub>4</sub> genomes are highly syntenic and have undergone a modest amount of gene duplication and translocation since the different photosynthetic groups divided. The background knowledge and publicly available genomic resources make <em>Alloteropsis</em> <em>semialata</em> a great model for further comparative analyses of photosynthetic diversification.</p>
Alloteropsis semialata as a study system for C4 evolution in grasses
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