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Correlated Evolution Of Genome Size And Cell Volume In Diatoms (Bacillariophyceae), Jessica A. Connolly, Matthew J. Oliver, Jeremy M. Beaulieu, Charles A. Knight, Lars Tomanek, Mark A. Moline
Correlated Evolution Of Genome Size And Cell Volume In Diatoms (Bacillariophyceae), Jessica A. Connolly, Matthew J. Oliver, Jeremy M. Beaulieu, Charles A. Knight, Lars Tomanek, Mark A. Moline
Biological Sciences
A correlation between genome size and cell volume has been observed across diverse assemblages of eukaryotes. We examined this relationship in diatoms (Bacillariophyceae), a phylum in which cell volume is of critical ecological and biogeochemical importance. In addition to testing whether there is a predictive relationship across extant species, we tested whether evolutionary divergences in genome size were correlated with evolutionary divergences in cell size (using independent contrasts). We estimated total DNA content for 16 diatom species using a flow cytometer and estimated cell volumes using critical dimensions with scaling equations. Our independent contrast analyses indicated a significant correlated evolution …