Pre-Darwinian Evolution Before LUCA

被引：4

作者：

Tang S. ^{[1
]}

机构：

[1] School of International Relations and Public Affairs (SIRPA), Fudan University, Shanghai

来源：

Biological Theory | 2020年 / 15卷 / 4期

关键词：

Darwinian Threshold; FUCAs; Horizontal biomolecule transfer (HBMT); Horizontal gene transfer (HGT); LUCA; Pre-Darwinian evolution;

D O I：

10.1007/s13752-020-00359-2

中图分类号：

学科分类号：

摘要：

If the coming of the last universal cellular ancestor (LUCA) marks the crossing of the “Darwinian Threshold” (Woese in Proc Natl Acad Sci USA 99:8742–8747, 2002), pre-LUCA evolution must have been pre-Darwinian. But how did pre-Darwinian evolution actually operate? Bringing together and extending insights from both earlier and more recent contributions, this essay advances three principal arguments regarding the pre-Darwinian evolution. First, in the pre-Darwinian epoch, survival essentially meant persistence within the prebiotic system, and it depended mostly on chemical variation and interaction. Second, selection operated upon four different properties: chemical; chemical-physical; vesicles’ capacities in absorbing, engulfing, and merging; and protocells’ coupling of metabolism, replication, and division. Third, division evolved from a state without tight coupling of replication with division to a state of tight coupling. Eventually, protocells with a tight coupling of replication with division became the First Universal Cellular Ancestors (FUCAs) and then LUCA. © 2020, Konrad Lorenz Institute for Evolution and Cognition Research.

引用

页码：175 / 179

页数：4

共 47 条

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