Emergence of diverse life cycles and life histories at the origin of multicellularity
Emergence of diverse life cycles and life histories at the origin of multicellularity
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多细胞起源时不同生命周期和生命史的出现
DOI：
10.1038/s41559-019-0940-0
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发表时间：
2019
影响因子：
16.8
通讯作者：
C. Tarnita
中科院分区：
文献类型：
--
作者：
M. Staps;J. van Gestel;C. Tarnita
多细胞生物的进化已经引起了多细胞生命周期和生活史的显着多样性。一些多细胞生物寿命长，通过细胞分裂生长，并反复释放单细胞繁殖体（例如动物），而另一些多细胞生物寿命短，通过聚集形成，仅繁殖一次，通过产生大量的孤立细胞（例如细胞黏菌）。目前还没有系统的研究来探索多细胞生命周期的多样性。在这里，我们专注于多细胞的起源，并开发了一个机械模型来研究原始的生命周期，出现从一个单细胞祖先时，祖先基因被增选细胞粘附。不同的生命周期很容易出现，这取决于生态条件，群体形成机制和祖先的限制。在这些生命周期中，我们概括了两个极端的长寿的群体，不断传播和短命的群体，传播只有一次，与后一种类型的生命周期特别有利于群体时，可以形成聚合。我们的研究结果表明，不同的生命周期和生活史可以很容易地出现在多细胞生物的起源，由祖先的约束和生态条件的形状。除了多细胞生物之外，这一发现对其他重大转变也有类似的影响，比如社会性的进化。多细胞性在几种情况下独立出现，并且可以采取不同的形式。一个理论模型探讨了生态条件，祖先的限制，和紧急多细胞生命周期和生活史之间的关系。
The evolution of multicellularity has given rise to a remarkable diversity of multicellular life cycles and life histories. Whereas some multicellular organisms are long-lived, grow through cell division, and repeatedly release single-celled propagules (for example, animals), others are short-lived, form by aggregation, and propagate only once, by generating large numbers of solitary cells (for example, cellular slime moulds). There are no systematic studies that explore how diverse multicellular life cycles can come about. Here, we focus on the origin of multicellularity and develop a mechanistic model to examine the primitive life cycles that emerge from a unicellular ancestor when an ancestral gene is co-opted for cell adhesion. Diverse life cycles readily emerge, depending on ecological conditions, group-forming mechanism, and ancestral constraints. Among these life cycles, we recapitulate both extremes of long-lived groups that propagate continuously and short-lived groups that propagate only once, with the latter type of life cycle being particularly favoured when groups can form by aggregation. Our results show how diverse life cycles and life histories can easily emerge at the origin of multicellularity, shaped by ancestral constraints and ecological conditions. Beyond multicellularity, this finding has similar implications for other major transitions, such as the evolution of sociality. Multicellularity has arisen independently on several occasions and can take different forms. A theoretical model explores the relationship between ecological conditions, ancestral constraints, and emergent multicellular life cycles and life histories.
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影响因子：
19
作者：
Abedin, Monika;King, Nicole
通讯作者：
King, Nicole
新生的生命周期和更高层次个性的出现
DOI：
10.1098/rstb.2016.0420
发表时间：
2017
期刊：
Philosophical Transactions of the Royal Society B: Biological Sciences
影响因子：
--
作者：
Ratcliff, William C.;Herron, Matthew;Conlin, Peter L.;Libby, Eric
通讯作者：
Libby, Eric
影响因子：
2
作者：
Tarnita, Corina E.;Taubes, Clifford H.;Nowak, Martin A.
通讯作者：
Nowak, Martin A.
影响因子：
4.6
作者：
Herron, Matthew D.;Borin, Joshua M.;Ratcliff, William C.
通讯作者：
Ratcliff, William C.
DOI：
10.1073/pnas.1421402112
发表时间：
2015-05
期刊：
Proceedings of the National Academy of Sciences
影响因子：
--
作者：
S. West;R. M. Fisher;A. Gardner;E. Kiers
通讯作者：
S. West;R. M. Fisher;A. Gardner;E. Kiers