The many roads to and from multicellularity

被引:36
|
作者
Niklas, Karl J. [1 ]
Newman, Stuart A. [2 ]
机构
[1] Cornell Univ, Plant Biol Sect, Sch Integrat Plant Sci, Ithaca, NY 14853 USA
[2] New York Med Coll, Dept Cell Biol & Anat, Valhalla, NY 10595 USA
关键词
Algae; evolution; fungi; land plants; metazoans; multilevel selection theory; unicellular bottleneck; Volvox; CO-OPTION; EVOLUTION; DICTYOSTELIUM; MORPHOGENESIS; ADAPTATION; COMPLEXITY; ORIGINS; VOLVOX;
D O I
10.1093/jxb/erz547
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
The multiple origins of multicellularity had far-reaching consequences ranging from the appearance of phenotypically complex life-forms to their effects on Earth's aquatic and terrestrial ecosystems. Yet, many important questions remain. For example, do all lineages and clades share an ancestral developmental predisposition for multicellularity emerging from genomic and biophysical motifs shared from a last common ancestor, or are the multiple origins of multicellularity truly independent evolutionary events? In this review, we highlight recent developments and pitfalls in understanding the evolution of multicellularity with an emphasis on plants (here defined broadly to include the polyphyletic algae), but also draw upon insights from animals and their holozoan relatives, fungi and amoebozoans. Based on our review, we conclude that the evolution of multicellular organisms requires three phases (origination by disparate cell-cell attachment modalities, followed by integration by lineage-specific physiological mechanisms, and autonomization by natural selection) that have been achieved differently in different lineages.
引用
收藏
页码:3247 / 3253
页数:7
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