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Sison-Mangus, M. P., University of Basel, Basel, Switzerland, msisonma@uci.edu
Jiang, S. ., University of California Irvine, Irvine, USA, sjiang@uci.edu

THE MICROBIOME OF MARINE DIATOMS: IS IT INFLUENCED BY ALGAL HOST PHYLOGENY?

Diatoms are the most prolific primary producers in the ocean and are very successful in forming algal blooms in the coastal and open ocean that allows for the sequestration of carbon in deep sediments; thus diatoms are major drivers of the global carbon cycling. Part of their ecological success is attributed to their unique evolutionary and physiological make-up as deduced from two representative diatom genomes sequenced to date. Genome sequences revealed that bacterial genes contribute up to 5% of their genome make-up, highlighting the close association of marine diatom with bacteria in the diatom’s evolutionary history. So far, few have looked at the diversity of epibiotic bacteria associating with different diatom species and hardly any have looked at these microscale interaction. To begin to dissect this intimate association, we started by assessing the diversity of epibiotic bacteria associating with 3 phylogenetically distant group of marine diatoms (radial centric, polar centric and pennate diatoms) using 454 next-generation sequencing. In our presentation, we will illustrate if diatom-bacteria association is influenced by algal host phylogeny, algal physiology or by random chance.

Session #:137
Date: 2/20/2012
Time: 11:15
Location: Ballroom D

Presentation is given by student: No