EVIDENCE FOR MULTIPLE ADAPTIVE PEAKS FROM POPULATIONS OF BACTERIA EVOLVING IN A STRUCTURED HABITAT

被引:126
作者
KORONA, R [1 ]
NAKATSU, CH [1 ]
FORNEY, LJ [1 ]
LENSKI, RE [1 ]
机构
[1] MICHIGAN STATE UNIV, CTR MICROBIAL ECOL, E LANSING, MI 48824 USA
关键词
HABITAT STRUCTURE; ADAPTATION; DIVERGENCE; FITNESS; COMAMONAS SP;
D O I
10.1073/pnas.91.19.9037
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Natural selection tends to promote the divergence of populations living in different environments. Even in identical environments, however, replicate populations may diverge if they find alternative adaptive solutions. We describe the evolution of 18 bacterial populations (Comamonas sp.) founded from a single progenitor genotype and propagated separately for 1000 generations in two distinct environments, one physically unstructured (mass-action liquid) and the other structured (agar surfaces). Phenotypic diversity, as reflected in colony morphology, was greater in the structured habitat than in the unstructured habitat. More importantly, the trajectories for mean fitness, as measured by competition against the common ancestor, were more divergent for populations in the structured habitat than those in the unstructured habitat. Structured environments may accelerate evolutionary diversification by promoting genetic polymorphisms within populations, thereby increasing the complexity of genetic constraints that allow divergence among replicate populations.
引用
收藏
页码:9037 / 9041
页数:5
相关论文
共 37 条
  • [1] COMPETITION BETWEEN SPECIES - FREQUENCY DEPENDENCE
    AYALA, FJ
    [J]. SCIENCE, 1971, 171 (3973) : 820 - +
  • [2] THE FREQUENCY OF SHIFTS BETWEEN ALTERNATIVE EQUILIBRIA
    BARTON, NH
    ROUHANI, S
    [J]. JOURNAL OF THEORETICAL BIOLOGY, 1987, 125 (04) : 397 - 418
  • [3] BARTON NH, 1992, EVOLUTION, V46, P551, DOI 10.1111/j.1558-5646.1992.tb02058.x
  • [4] GENETIC REVOLUTIONS, FOUNDER EFFECTS, AND SPECIATION
    BARTON, NH
    CHARLESWORTH, B
    [J]. ANNUAL REVIEW OF ECOLOGY AND SYSTEMATICS, 1984, 15 : 133 - 164
  • [5] STRUCTURED HABITATS AND THE EVOLUTION OF ANTICOMPETITOR TOXINS IN BACTERIA
    CHAO, L
    LEVIN, BR
    [J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA-BIOLOGICAL SCIENCES, 1981, 78 (10): : 6324 - 6328
  • [6] BIODEGRADATION OF HALOGENATED ORGANIC-COMPOUNDS
    CHAUDHRY, GR
    CHAPALAMADUGU, S
    [J]. MICROBIOLOGICAL REVIEWS, 1991, 55 (01) : 59 - 79
  • [7] COHAN FM, 1984, EVOLUTION, V38, P495, DOI 10.1111/j.1558-5646.1984.tb00315.x
  • [8] COHAN FM, 1986, GENETICS, V114, P145
  • [9] COHAN FM, 1984, EVOLUTION, V38, P55, DOI [10.2307/2408547, 10.1111/j.1558-5646.1984.tb00260.x]
  • [10] BACTERIAL BIOFILMS IN NATURE AND DISEASE
    COSTERTON, JW
    CHENG, KJ
    GEESEY, GG
    LADD, TI
    NICKEL, JC
    DASGUPTA, M
    MARRIE, TJ
    [J]. ANNUAL REVIEW OF MICROBIOLOGY, 1987, 41 : 435 - 464