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Functional Integration and Individuality in Prokaryotic Collective Organisations.

Authors
  • Militello, Guglielmo1
  • Bich, Leonardo2
  • Moreno, Alvaro1
  • 1 IAS-Research Centre for Life, Mind and Society, Department of Logic and Philosophy of Science, University of the Basque Country (UPV/EHU), Avenida de Tolosa 70, 20018, Donostia-San Sebastian, Spain. , (Spain)
  • 2 IAS-Research Centre for Life, Mind and Society, Department of Logic and Philosophy of Science, University of the Basque Country (UPV/EHU), Avenida de Tolosa 70, 20018, Donostia-San Sebastian, Spain. [email protected] , (Spain)
Type
Published Article
Journal
Acta biotheoretica
Publication Date
Sep 01, 2021
Volume
69
Issue
3
Pages
391–415
Identifiers
DOI: 10.1007/s10441-020-09390-z
PMID: 32816285
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

Both physiological and evolutionary criteria of biological individuality are underpinned by the idea that an individual is a functionally integrated whole. However, a precise account of functional integration has not been provided so far, and current notions are not developed in the details, especially in the case of composite systems. To address this issue, this paper focuses on the organisational dimension of two representative associations of prokaryotes: biofilms and the endosymbiosis between prokaryotes. Some critical voices have been raised against the thesis that biofilms are biological individuals. Nevertheless, it has not been investigated which structural and functional obstacles may prevent them from being fully integrated physiological or evolutionary units. By contrast, the endosymbiotic association of different species of prokaryotes has the potential for achieving a different type of physiological integration based on a common boundary and interlocked functions. This type of association had made it possible, under specific conditions, to evolve endosymbionts into fully integrated organelles. This paper therefore has three aims: first, to analyse the organisational conditions and the physiological mechanisms that enable integration in prokaryotic associations; second, to discuss the organisational differences between biofilms and prokaryotic endosymbiosis and the types of integration they achieve; finally, to provide a more precise account of functional integration based on these case studies. © 2020. Springer Nature B.V.

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