The Genome of the Diatom <i>Thalassiosira Pseudonana</i> : Ecology, Evolution, and Metabolism
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Abstract
Diatoms are unicellular algae with plastids acquired by secondary endosymbiosis. They are responsible for approximately 20% of global carbon fixation. We report the 34 million-base pair draft nuclear genome of the marine diatom Thalassiosira pseudonana and its 129 thousand-base pair plastid and 44 thousand-base pair mitochondrial genomes. Sequence and optical restriction mapping revealed 24 diploid nuclear chromosomes. We identified novel genes for silicic acid transport and formation of silica-based cell walls, high-affinity iron uptake, biosynthetic enzymes for several types of polyunsaturated fatty acids, use of a range of nitrogenous compounds, and a complete urea cycle, all attributes that allow diatoms to prosper in aquatic environments.
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The record
- Venue
- Science
- Topic
- Diatoms and Algae Research
- Field
- Materials Science
- Canadian institutions
- Lockheed Martin (Canada)University of British Columbia
- Funders
- —
- Keywords
- Thalassiosira pseudonanaPlastidDiatomBiologyAlgaeEndosymbiosisGenomeBotanyPhytoplanktonPhototrophCarbon fixationPhotosynthesisBiochemistryGeneEcologyChloroplastNutrient
- Has abstract in OpenAlex
- yes