The phylogeny of the Archaea continues to be revisited and revised as new groups are discovered and phylogenetic methods improve, but key questions about their early evolution remain. It has been sugg...

Symbiotic relationships transform diverse aspects of both symbiont and host biology. The most visible changes include a massive reduction of the endosymbiont genome and the development of novel host o...

The Department of Organismal Biology teaches and explores the evolution, development and function on the organismal level. For more information see Department of Organismal Biology - Uppsala Universit

Bacteria with an intracellular lifestyle need to feed from inside their host cells. This study shows an adaptation of certain symbiotic bacteria, allowing them to actively retrieve nutrients from the host. High-pressure cryofixation has been combined with volume electron microscopy and in situ high spatial resolution chemical analysis. It reveals a complex bacterial membranous network that increases the exchange interface between the bacteria and host cytosol and maximizes carbohydrate acquisition.

Abstract. Metabarcoding has emerged as a robust method for assessing biodiversity patterns by retrieving environmental DNA directly from ecosystems. While

As the ecological and evolutionary importance of symbiotic interactions between protists (microbial eukaryotes) and prokaryotes (bacteria and archaea) is better appreciated, keeping an overview of th...

An exploration of the viromes of haloarchaea and their ultra-small DPANN symbionts reveals plasmid-derived satellites of viruses from both archaeal groups, highlighting the complexity of nested symbio...