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Optimization and Comparative Analysis of Plant Organellar DNA Enrichment Methods Suitable for Next-generation Sequencing
Published on: July 28, 2017
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How to upgrade stolen organelles into permanent plastids: A comparative transcriptomic perspective
Norico Yamada1, Richard G Dorrell2, Ugo Cenci3
1Department of Biology, University of Konstanz, Konstanz 78457, Germany.
Summary
Dinotoms, marine algae, provide insights into plastid acquisition. Their genomes show adaptation, moving from temporary theft to permanent integration and metabolic codependence, revealing organelle evolution in action.
Area of Science:
- Marine biology
- Evolutionary biology
- Genomics
Background:
- Tertiary plastids in dinotoms originate from diatoms, offering a unique model for organellogenesis.
- The genomic and metabolic changes during this plastid conversion are not well understood.
Purpose of the Study:
- To compare transcriptomic data of two dinotoms at different stages of plastid integration.
- To investigate genomic and metabolic adaptations in the diatom nucleus during plastid acquisition.
Main Methods:
- Comparative transcriptomic analysis of *Durinskia capensis* (kleptoplasty) and *Durinskia kwazulunatalensis* (early permanent plastid state).
- Analysis of gene expression, nuclear genome alterations (intron insertions, GC content), and metabolic pathways.
Main Results:
- Both dinotoms show plastid-biased nuclear expression, indicating host influence.
- *D. kwazulunatalensis* displays significant nuclear genomic reconfiguration (intron insertions, increased GC content) and expresses a complete hexose phosphate export pathway.
- Diatom cell division (karyokinesis) may be regulated by transcription factor suppression and nitrate availability.
Conclusions:
- Dinotoms exhibit a spectrum of plastid integration, from temporary theft to genomic and metabolic codependence.
- These findings illuminate the evolutionary steps of kleptoplastid permanence and organelle integration.
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