Pattern formation by bacteria-driven flow

被引:14
作者
Cogan, NG
Wolgemuth, CW [1 ]
机构
[1] Univ Connecticut, Ctr Hlth, Dept Cell Biol, Farmington, CT 06030 USA
[2] Tulane Univ, Dept Math, New Orleans, LA 70118 USA
关键词
D O I
10.1529/biophysj.104.053348
中图分类号
Q6 [生物物理学];
学科分类号
071011 ;
摘要
Some marine bacterial species form mucosal layers, called veils, on sulfidic marine sediment. The bacteria attached to this veil actively swim and exert force on the surrounding fluid. The bacteria can break free of the veil and swim, chemotacting back to the veil. Over time the veil forms holes arranged in a hexagonal pattern. Motivated by this system, we present a simplified model to describe pattern formation induced by force-generating bodies embedded in a layer surrounded by fluid. When the bacteria break free of the layer, they are advected by the flow and diffuse. Competition between the fluid flow generated by the embedded bacteria and diffusion of the swimmers leads to a novel instability that drives bacterial aggregation. Analytic and numeric analysis of this system correctly defines the length scale and developmental timescale for the biological system. Similar flow dynamics may also play a role in other biological systems such as encrusting bryozoan colonies.
引用
收藏
页码:2525 / 2529
页数:5
相关论文
共 22 条
[1]  
Berg H. C., 1993, RANDOM WALKS BIOL
[2]   IMAGE SYSTEM FOR A STOKESLET IN A NO-SLIP BOUNDARY [J].
BLAKE, JR .
PROCEEDINGS OF THE CAMBRIDGE PHILOSOPHICAL SOCIETY-MATHEMATICAL AND PHYSICAL SCIENCES, 1971, 70 (SEP) :303-&
[3]   PROCESSES GOVERNING PRIMARY BIOFILM FORMATION [J].
BRYERS, JD ;
CHARACKLIS, WG .
BIOTECHNOLOGY AND BIOENGINEERING, 1982, 24 (11) :2451-2476
[4]   MICROBIAL BIOFILMS [J].
COSTERTON, JW ;
LEWANDOWSKI, Z ;
CALDWELL, DE ;
KORBER, DR ;
LAPPINSCOTT, HM .
ANNUAL REVIEW OF MICROBIOLOGY, 1995, 49 :711-745
[5]   Veil architecture in a sulphide-oxidizing bacterium enhances countercurrent flux [J].
Fenchel, T ;
Glud, RN .
NATURE, 1998, 394 (6691) :367-369
[6]   MOTILITY AND CHEMOSENSORY BEHAVIOR OF THE SULFUR BACTERIUM THIOVULUM-MAJUS [J].
FENCHEL, T .
MICROBIOLOGY-UK, 1994, 140 :3109-3116
[7]   Stress induces neurogenesis in non-neuronal cell cultures of adult olfactory epithelium [J].
Féron, F ;
Mackay-Sim, A ;
Andrieu, JL ;
Matthaei, KI ;
Holley, A ;
Sicard, G .
NEUROSCIENCE, 1999, 88 (02) :571-583
[8]  
JORGENSEN BB, 1983, APPL ENVIRON MICROB, V45, P1261
[9]   Short-wavelength instability in presence of a zero mode: Anomalous growth law [J].
Kliakhandler, IL ;
Malomed, BA .
PHYSICS LETTERS A, 1997, 231 (3-4) :191-194
[10]   Chimney spacing in encrusting bryozoan colonies (Membranipora membranacea):: Video observations and hydrodynamic modeling [J].
Larsen, PS ;
Riisgård, HU .
OPHELIA, 2001, 54 (03) :167-176