当前位置: X-MOL 学术Proc. Royal Soc. B: Biol. Sci. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Synchronized emergence under diatom sperm competition
Proceedings of the Royal Society B: Biological Sciences ( IF 4.7 ) Pub Date : 2020-10-07 , DOI: 10.1098/rspb.2020.1074
Yuka Shirokawa 1 , Masakazu Shimada 1
Affiliation  

Appropriate timing of mating is crucial for the success of individuals. However, we know little about factors that explain variation in mating time in unicellular organisms. Unicellular eukaryotes often have facultative sexuality, that is, the less frequent sex is occasionally induced after long clonal reproduction. Thus, males originated from clonemates could be non-negligible mating rivals. Using a centric diatom whose clonal cells differentiate into either male or female, we analysed whether males (spermatogonium) compete or cooperate with each other. By analysing differentiation timing with hypotheses based on evolutionary game theory, we estimated that a substantial part of the variation in the mating timing of the diatom can be explained by results of optimization through interactions among selfish individuals rather than cooperation among clonemates. However, the competition is fiercer than expected owing to excessive synchronization, which was realized by adjustment of meiotic duration: cells completed mitotic division in the earlier mating phase took longer to enter into meiosis, whereas late-dividing cells entered into meiosis more quickly. Adjacent cells tended to synchronize, and model analyses suggest that cell–cell interaction can create a gap between the optimal and actual decisions. Our results provide insights into the evolution of cellular decision making and its restriction.

中文翻译:

硅藻精子竞争下的同步出苗

适当的交配时间对个体的成功至关重要。然而,我们对解释单细胞生物交配时间变化的因素知之甚少。单细胞真核生物常具有兼性性行为,即经过长时间的克隆繁殖后偶尔会诱发较少的性行为。因此,源自克隆人的雄性可能是不可忽视的交配对手。使用其克隆细胞分化为雄性或雌性的中心硅藻,我们分析了雄性(精原细胞)是否相互竞争或合作。通过基于进化博弈论的假设分析微分时机,我们估计,硅藻交配时间的很大一部分变化可以通过自私个体之间的相互作用而不是克隆人之间的合作进行优化的结果来解释。然而,由于过度同步,竞争比预期的更加激烈,这是通过调整减数分裂持续时间来实现的:交配早期完成有丝分裂的细胞进入减数分裂的时间更长,而分裂后期的细胞进入减数分裂的速度更快。相邻的细胞倾向于同步,模型分析表明细胞间的相互作用会在最佳决策和实际决策之间产生差距。我们的结果提供了对细胞决策的演变及其限制的见解。由于过度同步,竞争比预期更加激烈,这是通过调整减数分裂持续时间来实现的:交配早期完成有丝分裂的细胞进入减数分裂的时间更长,而分裂后期的细胞进入减数分裂的速度更快。相邻的细胞倾向于同步,模型分析表明细胞间的相互作用会在最佳决策和实际决策之间产生差距。我们的结果提供了对细胞决策的演变及其限制的见解。由于过度同步,竞争比预期更加激烈,这是通过调整减数分裂持续时间来实现的:交配早期完成有丝分裂的细胞进入减数分裂的时间更长,而分裂后期的细胞进入减数分裂的速度更快。相邻的细胞倾向于同步,模型分析表明细胞间的相互作用会在最佳决策和实际决策之间产生差距。我们的结果提供了对细胞决策的演变及其限制的见解。模型分析表明,细胞间相互作用可以在最佳决策和实际决策之间产生差距。我们的结果提供了对细胞决策的演变及其限制的见解。模型分析表明,细胞间相互作用可以在最佳决策和实际决策之间产生差距。我们的结果提供了对细胞决策的演变及其限制的见解。
更新日期:2020-10-07
down
wechat
bug