Nonuniversality of front fluctuations for compact colonies of nonmotile bacteria

Santalla, Silvia N., Rodríguez-Laguna, Javier, Abad, José P., Marín, Irma, Espinosa, María del Mar, Muñoz-García, Javier, Vázquez, Luis y Cuerno, Rodolfo . (2018) Nonuniversality of front fluctuations for compact colonies of nonmotile bacteria. PHYSICAL REVIEW E, 98

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Título Nonuniversality of front fluctuations for compact colonies of nonmotile bacteria
Autor(es) Santalla, Silvia N.
Rodríguez-Laguna, Javier
Abad, José P.
Marín, Irma
Espinosa, María del Mar
Muñoz-García, Javier
Vázquez, Luis
Cuerno, Rodolfo
Materia(s) Física
Abstract The front of a compact bacterial colony growing on a Petri dish is a paradigmatic instance of non-equilibrium fluctuations in the celebrated Eden, or Kardar-Parisi-Zhang (KPZ), universality class. While in many experiments the scaling exponents crucially differ from the expected KPZ values, the source of this disagreement has remained poorly understood. We have performed growth experiments with B. subtilis 168 and E. coli ATCC 25922 under conditions leading to compact colonies in the classically alleged Eden regime, where individual motility is suppressed. Non-KPZ scaling is indeed observed for all accessible times, KPZ asymptotics being ruled out for our experiments due to the monotonic increase of front branching with time. Simulations of an effective model suggest the occurrence of transient nonuniversal scaling due to diffusive morphological instabilities, agreeing with expectations from detailed models of the relevant biological reaction-diffusion processes.
Editor(es) American Physical Society
Fecha 2018-07-10
Formato application/pdf
Identificador bibliuned:DptoFF-FCIE-Articulos-Jrodriguez-0007
http://e-spacio.uned.es/fez/viewbibliuned:DptoFF-FCIE-Articulos-Jrodriguez-0007
DOI - identifier 10.1103/PhysRevE.98.012407
Nombre de la revista PHYSICAL REVIEW E
Número de Volumen 98
Publicado en la Revista PHYSICAL REVIEW E, 98
Idioma eng
Versión de la publicación publishedVersion
Tipo de recurso Article
Derechos de acceso y licencia info:eu-repo/semantics/openAccess
Tipo de acceso Acceso abierto
Notas adicionales The registered version of this article, first published in PHYSICAL REVIEW E, 98, is available online at the publisher's website: American Physical Society, https://doi.org/10.1103/PhysRevE.98.012407

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Creado: Thu, 01 Feb 2024, 02:19:54 CET