2017
DOI: 10.1038/s41598-017-18160-w
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Phototaxis as a Collective Phenomenon in Cyanobacterial Colonies

Abstract: Cyanobacteria are a diverse group of photosynthetic bacteria that exhibit phototaxis, or motion in response to light. Cyanobacteria such as Synechocystis sp. secrete a mixture of complex polysaccharides that facilitate cell motion, while their type 4 pili allow them to physically attach to each other. Even though cells can respond individually to light, colonies are observed to move collectively towards the light source in dense finger-like projections. We present an agent-based model for cyanobacterial photot… Show more

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Cited by 26 publications
(31 citation statements)
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“…1B). As observed in Synechocystis (39,40), UTEX 3055 forms finger-like projections directed toward the light source on soft agarose plates ( Fig. 1C and Movies S1-S3).…”
Section: Significancesupporting
confidence: 65%
“…1B). As observed in Synechocystis (39,40), UTEX 3055 forms finger-like projections directed toward the light source on soft agarose plates ( Fig. 1C and Movies S1-S3).…”
Section: Significancesupporting
confidence: 65%
“…The model used in this paper is adapted from a previously proposed model [22] for the collective motion of cyanobacterial colonies illuminated by a single light source. This model described the behaviour of independently motile cells that can physically interact with each other, and move towards a distant light source.…”
Section: Methodsmentioning
confidence: 99%
“…Our perspective on such collective phenomena is motivated by models for active matter [20,21], which describe the collective behaviour of systems of selfpropelled units. Our earlier model [22] incorporated motion at the level of single cells, cell-cell interactions mediated via T4P and the decrease in surface friction through the deposition of slime. That model is extended here to incorporate what is known about the response of cells to variations in light intensity and wavelength, including the possibility of negative phototaxis.…”
Section: Introductionmentioning
confidence: 99%
“…This penalizes cell overlaps through a soft-core repulsion. A detailed discussion of the motivation for choosing this specific form of K ij , and of the associated parameter values, is presented in [22]. The cell i thus experiences a total external force,…”
Section: Cell-cell Interactionsmentioning
confidence: 99%