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Fabrication of Microscope Stage for Vertical Observation with Temperature Control Function
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A simple probabilistic model of submicroscopic diatom morphogenesis.

L Willis1, E J Cox, T Duke

  • 1CoMPLEX, University College London, , Gower Street, London, UK. lw464@cam.ac.uk

Journal of the Royal Society, Interface
|April 5, 2013
PubMed
Summary

Diatoms build intricate exoskeletons through biomineralization. A new model reveals that lateral negative feedback on reaction kinetics sufficiently explains the formation of submicroscopic pore occlusion patterns in these algae.

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Area of Science:

  • Biomineralization
  • Algal morphogenesis
  • Computational modeling

Background:

  • Diatoms are unicellular algae that create complex, mineralized exoskeletons.
  • The intracellular processes governing diatom biomineralization and exoskeleton structure formation remain incompletely understood.
  • Many intricate microscale structures, such as pore occlusions, have not been replicated in vitro.

Purpose of the Study:

  • To develop and analyze a simplified biomineral kinetics model for diatom exoskeleton morphogenesis.
  • To investigate the mechanisms underlying the formation of submicroscopic patterned structures, specifically pore occlusions.
  • To identify key physio-biochemical factors driving submicroscopic pattern formation.

Main Methods:

  • Introduction and analysis of a nonlinear, stochastic biomineral kinetics model.
  • The model is an extension of the threshold voter model.
  • Focus on reproducing submicroscopic patterned planar structures (pore occlusions) by parameter tuning.

Main Results:

  • The model successfully reproduces key features of diatom pore occlusions by adjusting a single parameter.
  • This suggests that lateral negative feedback on biomineral reaction kinetics is a sufficient mechanism for submicroscopic morphogenesis.
  • The model's mean-field equation offers a novel approach to mapping spatial patterns generated by lateral inhibition.

Conclusions:

  • Lateral negative feedback is a critical factor in the submicroscopic pattern formation of diatom exoskeletons.
  • The developed model provides insights into the fundamental principles of biomineral pattern generation.
  • This work advances the understanding of diatom morphogenesis and offers a new analytical tool for studying pattern formation.