AUTHOR=Cole Logan W. TITLE=The Evolution of Per-cell Organelle Number JOURNAL=Frontiers in Cell and Developmental Biology VOLUME=4 YEAR=2016 URL=https://www.frontiersin.org/journals/cell-and-developmental-biology/articles/10.3389/fcell.2016.00085 DOI=10.3389/fcell.2016.00085 ISSN=2296-634X ABSTRACT=

Organelles with their own distinct genomes, such as plastids and mitochondria, are found in most eukaryotic cells. As these organelles and their host cells have evolved, the partitioning of metabolic processes and the encoding of interacting gene products have created an obligate codependence. This relationship has played a role in shaping the number of organelles in cells through evolution. Factors such as stochastic evolutionary forces acting on genes involved in organelle biogenesis, organelle–nuclear gene interactions, and physical limitations may, to varying degrees, dictate the selective constraint that per-cell organelle number is under. In particular, coordination between nuclear and organellar gene expression may be important in maintaining gene product stoichiometry, which may have a significant role in constraining the evolution of this trait.