Nutrient chemotaxis suppression of a diffusive instability in bacterial colony dynamics

被引:7
作者
Arouh, S [1 ]
Levine, H [1 ]
机构
[1] Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA
来源
PHYSICAL REVIEW E | 2000年 / 62卷 / 01期
关键词
D O I
10.1103/PhysRevE.62.1444
中图分类号
O35 [流体力学]; O53 [等离子体物理学];
学科分类号
070204 ; 080103 ; 080704 ;
摘要
Bacteria grown on a semisolid agar surface have been observed to form branching patterns as the colony envelope propagates outward. The fundamental cause of this instability relates to the need for limited nutrient to diffuse towards the colony. Here, we investigate the effect on this instability of allowing the bacteria to move chemotactically in response to the nutrient gradient. Our results show that this additional effect has a tendency to suppress the instability. Our calculations are done within the context of a simple "cutoff" model of colony dynamics, but presumably remain valid for more complex and hence mon realistic approaches.
引用
收藏
页码:1444 / 1447
页数:4
相关论文
共 19 条
[1]   ADAPTIVE SELF-ORGANIZATION DURING GROWTH OF BACTERIAL COLONIES [J].
BENJACOB, E ;
SHMUELI, H ;
SHOCHET, O ;
TENENBAUM, A .
PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS, 1992, 187 (3-4) :378-424
[2]   From snowflake formation to growth of bacterial colonies .2. Cooperative formation of complex colonial patterns [J].
BenJacob, E .
CONTEMPORARY PHYSICS, 1997, 38 (03) :205-241
[3]   THE FORMATION OF PATTERNS IN NONEQUILIBRIUM GROWTH [J].
BENJACOB, E ;
GARIK, P .
NATURE, 1990, 343 (6258) :523-530
[4]   DYNAMICS OF FORMATION OF SYMMETRICAL PATTERNS BY CHEMOTACTIC BACTERIA [J].
BUDRENE, EO ;
BERG, HC .
NATURE, 1995, 376 (6535) :49-53
[5]   Chemotactic-based adaptive self-organization during colonial development [J].
Cohen, I ;
Czirok, A ;
BenJacob, E .
PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS, 1996, 233 (3-4) :678-698
[6]   BACTERIAL FRACTAL GROWTH IN THE CONCENTRATION FIELD OF NUTRIENT [J].
FUJIKAWA, H ;
MATSUSHITA, M .
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 1991, 60 (01) :88-94
[7]   FRACTAL GROWTH OF BACILLUS-SUBTILIS ON AGAR PLATES [J].
FUJIKAWA, H ;
MATSUSHITA, M .
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 1989, 58 (11) :3875-3878
[8]   Studies of bacterial branching growth using reaction-diffusion models for colonial development [J].
Golding, I ;
Kozlovsky, Y ;
Cohen, I ;
Ben-Jacob, E .
PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS, 1998, 260 (3-4) :510-554
[9]   Modeling spatio-temporal patterns generated by Bacillus subtilis [J].
Kawasaki, K ;
Mochizuki, A ;
Matsushita, M ;
Umeda, T ;
Shigesada, N .
JOURNAL OF THEORETICAL BIOLOGY, 1997, 188 (02) :177-185
[10]   Fluctuation-induced diffusive instabilities [J].
Kessler, DA ;
Levine, H .
NATURE, 1998, 394 (6693) :556-558