NDLI: Biophysical basis for convergent evolution of two veil-forming microbes

Content Provider	PubMed Central
Author	Petroff, Alexander P. Pasulka, Alexis L. Soplop, Nadine Wu, Xiao-lun Libchaber, Albert
Copyright Year	2015
Abstract	Microbes living in stagnant water typically rely on chemical diffusion to draw nutrients from their environment. The sulfur-oxidizing bacterium Thiovulum majus and the ciliate Uronemella have independently evolved the ability to form a ‘veil’, a centimetre-scale mucous sheet on which cells organize to produce a macroscopic flow. This flow pulls nutrients through the community an order of magnitude faster than diffusion. To understand how natural selection led these microbes to evolve this collective behaviour, we connect the physical limitations acting on individual cells to the cell traits. We show how diffusion limitation and viscous dissipation have led individual T. majus and Uronemella cells to display two similar characteristics. Both of these cells exert a force of approximately 40 pN on the water and attach to boundaries by means of a mucous stalk. We show how the diffusion coefficient of oxygen in water and the viscosity of water define the force the cells must exert. We then show how the hydrodynamics of filter-feeding orient a microbe normal to the surface to which it attaches. Finally, we combine these results with new observations of veil formation and a review of veil dynamics to compare the collective dynamics of these microbes. We conclude that this convergent evolution is a reflection of similar physical limitations imposed by diffusion and viscosity acting on individual cells.
Related Links	http://dx.doi.org/10.1098/rsos.150437
Starting Page	150437
File Format	PDF
ISSN	20545703
e-ISSN	20545703
Journal	Royal Society Open Science
Issue Number	11
Volume Number	2
Language	English
Publisher	The Royal Society Publishing
Publisher Date	2015-11-01
Access Restriction	Open
Rights Holder	The Royal Society Publishing
Subject Keyword	Science and Technology Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Multidisciplinary

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Molecular basis for convergent evolution of glutamate recognition by pentameric ligand-gated ion channels

Mechanical basis of morphogenesis and convergent evolution of spiny seashells

Historical contingency and its biophysical basis in glucocorticoid receptor evolution

Biophysical basis for the geometry of conical stromatolites

Experimental evidence for convergent evolution of maternal care heuristics in industrialized and small-scale populations

Convergent evolution of two mammalian neuronal enhancers by sequential exaptation of unrelated retroposons

Correction for Franchini et al., Convergent evolution of two mammalian neuronal enhancers by sequential exaptation of unrelated retroposons

Divergent biophysical controls of aquatic CO2 and CH4 in the World’s two largest rivers

Convergent evolution of marine mammals is associated with distinct substitutions in common genes

Biophysical basis for convergent evolution of two veil-forming microbes

Similar Documents

Molecular basis for convergent evolution of glutamate recognition by pentameric ligand-gated ion channels

Mechanical basis of morphogenesis and convergent evolution of spiny seashells

Historical contingency and its biophysical basis in glucocorticoid receptor evolution

Biophysical basis for the geometry of conical stromatolites

Experimental evidence for convergent evolution of maternal care heuristics in industrialized and small-scale populations

Convergent evolution of two mammalian neuronal enhancers by sequential exaptation of unrelated retroposons

Correction for Franchini et al., Convergent evolution of two mammalian neuronal enhancers by sequential exaptation of unrelated retroposons

Divergent biophysical controls of aquatic CO2 and CH4 in the World’s two largest rivers

Convergent evolution of marine mammals is associated with distinct substitutions in common genes

Biophysical basis for convergent evolution of two veil-forming microbes