Biology

Extinction transition in bacterial colonies under forced convection

Document Type

Article

Abstract

The spatiotemporal response of Bacillus subtilis growing on nutrient-rich layer of agar to ultraviolet (UV) radiation is reported. The bacteria are confined to regions that are shielded from UV radiation below a crossover temperature. By rotating a UV radiation shield relative to the Petri dish, a forced convection of the population is effected. The extinction at which the bacterial colony lags behind the shield is found to be qualitatively similar to the front velocity of the colony growing in the absence of a hostile environment.

Publication Title

Physical Review E - Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics

Publication Date

7-2000

Volume

62

Issue

1 B

First Page

1059

Last Page

1062

ISSN

1063-651X

DOI

10.1103/PhysRevE.62.1059

Keywords

Bacillus subtilis, ultraviolet radiation

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