Giant tubeworms

  title={Giant tubeworms},
  author={Monika Bright and Julia Klose and Andrea D. Nussbaumer},
  journal={Current Biology},
Figure 1. The giant tubeworm Riftia pachyptila. (A) Dense aggregation at a hydrothermal vent of the East Pacific Rise. (B) Life cycle with aposymbiotic phase from fertilized egg to settled larva (blue), and symbiotic phase from larva in metamorphosis to adult (red). Infection of Endoriftia (red) from a free-living microbial community occurs in the larva. (C) Relationships of siboglinids outlining a hypothetical scenario of evolution of symbiosis in the trophosome originating from several… 
The worm affair: Genetic diversity in two species of symbionts that co-occur in tubeworms from the Mediterranean Sea
Using comparative genomics, it is shown that mainly mobilome and defense mechanism-related features distinguish the symbiont genotypes, yet nitrate respiration is modular, yet this modularity is not linked to speciation, but rather to local adaptation.
The worm affair: fidelity and environmental adaptation in symbiont species that co-occur in vestimentiferan tubeworms.
Using comparative genomics, it is shown that mainly mobilome and genes involved in defence mechanisms distinguish the symbiont genotypes, yet nitrate respiration is modular, yet this modularity is not linked to phylotype, but rather to geographic location, potentially implying adaptation to the local environment.
Neural reconstruction of bone-eating Osedax spp. (Annelida) and evolution of the siboglinid nervous system
The intraepidermal nervous system with widely separated nerve cords, double brain commissures, double palp nerves and other traits found in Osedax can all be traced to represent ancestral states of Siboglinidae.
Antimicrobial peptides and cell processes tracking endosymbiont dynamics
Recent advances in the understanding of the bacteriocyte immune and cellular regulators involved in endosymbiont maintenance and control are compiled to focus on the cereal weevils Sitophilus spp.
Dual symbiosis with co-occurring sulfur-oxidizing symbionts in vestimentiferan tubeworms from a Mediterranean hydrothermal vent.
Vestimentiferan Tws from Marsili Seamount are investigated, showing that vestimentiferans can host multiple co-occurring symbiont types and that water depth had a significant effect on its own.
We're in this Together: Sensation of the Host Cell Environment by Endosymbiotic Bacteria.
It is suggested that studying TCS maintenance or loss may be informative about the evolutionary pathway taken toward endosymbiosis, or even toward endOSymbiont-to-organelle conversion.
Genetic evidence for two carbon fixation pathways in symbiotic and free-living bacteria: The Calvin-Benson-Bassham cycle and the reverse tricarboxylic acid cycle
The finding of a cultivable bacterium with two carbon fixation pathways in its genome opens the possibility to study the potential benefits of having two pathways and the interplay between these pathways.
Genetic Evidence for Two Carbon Fixation Pathways (the Calvin-Benson-Bassham Cycle and the Reverse Tricarboxylic Acid Cycle) in Symbiotic and Free-Living Bacteria
Comparative genomics shows that Thioflavicoccus mobilis, a cultured, free-living gammaproteobacterial sulfur oxidizer, possesses the genes for both carbon fixation pathways, and genomic and transcriptomic data suggest a potential electron flow toward the rTCA cycle carboxylase 2-oxoglutarate:ferredoxin oxidoreductase, via a rare variant of NADH dehydrogenase/heterodisulfide reductase in the E.


New Perspectives on the Ecology and Evolution of Siboglinid Tubeworms
The role of ecological conditions in the evolution of siboglinids is discussed and possible scenarios of the evolutionary origin of the symbiotic relationships between sibogslinids and their endosymbiotic bacteria are presented.
The biology of vestimentiferan tubeworms
New findings indicate that postlarval recruits get infected through the skin by free-living bacteria for which growth is rapidly and specifically limited by the host to mesoderm cells around the gut that further transform into the characteristic trophosome.
Physiological homogeneity among the endosymbionts of Riftia pachyptila and Tevnia jerichonana revealed by proteogenomics
The data strongly suggest that the two tubeworm species are able to effectively attenuate differences in habitat conditions, and thus to provide their symbionts with similar micro-environments.
Stable isotopes provide new insights into vestimentiferan physiological ecology at Gulf of Mexico cold seeps
A uniquely large and cohesive data set of δ13C, δ15N, and δ34S compositions of the vestimentiferan tubeworms Escarpia laminata and Lamellibrachia sp.
The metabolic demands of endosymbiotic chemoautotrophic metabolism on host physiological capacities
It is shown that moderate to high rates of chemoautotrophic or methanotrophic metabolism impose oxygen uptake and proton equivalent elimination demands upon the hosts that are much higher than is typical for the non-symbiotic annelid, bivalve and gastropod lineages to which they are related.
The metatrochophore of a deepsea hydrothermal vent vestimentiferans (Polychaeta: Siboglinidae)
  • Org. Divers. Evol
  • 2012