HORIZONTAL GENE TRANSFER IN DIATOM GENOMES
With diversity estimates ranging from 100,000–10,000,000 species, diatoms are probably the most species-rich lineage of microbial eukaryotes. Unlike most other eukaryotes, diatom genomes are thought to have been inordinately shaped by cross-kingdom horizontal gene transfer, with foreign bacterial genes comprising as many as 7.5% of the genes in one genome. These bacterial-derived genes are thought to have contributed significantly to the evolution and diversification of diatoms. We used newly sequenced diatom transcriptomes to identify the origins of these genes and characterize the pattern and timing of their introduction into diatom genomes. We also show that the diatom plastid genome has been shaped by foreign sequence acquisitions as well.
Alverson, A. J., University of Arkansas, USA, email@example.com
Kessenich, C. R., University of Arkansas, USA, firstname.lastname@example.org
Wickett, N. J., Chicago Botanic Garden, USA, email@example.com
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