Cooperative hydrodynamics accompany multicellular-like colonial organization in the unicellular ciliate Stentor.
Cooperative hydrodynamics accompany multicellular-like colonial organization in the unicellular ciliate Stentor.
复制标题
单细胞纤毛虫 Stentor 中的多细胞群落组织伴随着协同流体动力学。
DOI：
10.1101/2023.01.10.523506
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发表时间：
2023
期刊：
影响因子：
--
通讯作者：
Costello,JohnH
中科院分区：
文献类型：
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作者：
Shekhar,Shashank;Guo,Hanliang;Colin,SeanP;Marshall,Wallace;Kanso,Eva;Costello,JohnH
许多单细胞生物体既有孤独的存在，也有群居的存在。向多细胞化迈出的重要一步是形成单细胞生物群，这与增强营养吸收等好处有关。然而，最初有利于单个细胞聚集成更复杂的集落的驱动因素还不太清楚。在这里，我们表明，近邻之间的水动力耦合导致邻近纤毛虫的摄食流更快，因此动态群体中的个体比单独的个体具有更强的平均摄食流。由个人共同行动产生的流动达到更高的速度，从而允许获得比个人单独行动更广泛的猎物资源。此外，我们发现累积的摄食利益通常是不对称的：虽然所有个体都从共同行动中受益，但那些单独电流较慢的个体从伙伴关系中获得的收益比那些电流较快的个体更多。我们发现，简单单细胞生物体中的殖民地组织对其所有成员都是有益的。这提供了对有利于多细胞组织早期进化的选择性力量的基本见解。
Many single-celled organisms exhibit both solitary and colonial existence. An important step towards multicellularity, which is associated with benefits such as enhanced nutrient uptake, was the formation of colonies of unicellular organisms. However, the initial drivers that favoured individual cells aggregating into more complex colonies are less clear. Here we show that hydrodynamic coupling between proximate neighbours results in faster feeding flows for neighbouring ciliates, such that individuals within a dynamic colony have stronger average feeding flows than solitary individuals. Flows generated by individuals acting together reach higher velocities, thus allowing access to a wider range of prey resources than individuals acting on their own. Moreover, we find that accrued feeding benefits are typically asymmetric: whereas all individuals benefit from acting together, those with slower solitary currents gain more from partnering than those with faster currents. We find that colonial organization in simple unicellular organisms is beneficial for all its members. This provides fundamental insights into the selective forces favouring the early evolution of multicellular organization.