...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Physics, D. Applied Physics: A Europhysics Journal >A novel growth mode of Physarum polycephalum during starvation
【24h】

A novel growth mode of Physarum polycephalum during starvation

机译：饥饿过程中Physarum polycephalum的新型生长模式

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Organisms are constantly looking to forage and respond to various environmental queues to maximize their chance of survival. This is reflected in the unicellular organism Physarum polycephalum, which is known to grow as an optimized network. Here, we describe a new growth pattern of Physarum mesoplasmodium, where sheet-like motile bodies termed 'satellites' are formed. This non-network pattern formation is induced only when nutrients are scarce, suggesting that it is a type of emergency response. Our goal is to construct a model to describe the behaviour of satellites based on negative chemotaxis. We conjecture a diffusion-based model which implements detection of a signal molecule above a threshold concentration. Then we calculate how far the satellites must travel until the concentration signal falls below the threshold. These calculated distances are in good agreement with the distances where satellites stop. Based on the Akaike weight analysis, our threshold model is at least 2.3 times more likely to be the better model than the others we have considered. Based on the model, we estimate the diffusion coefficient of this molecule, which corresponds to typical signalling molecules.
机译：有机体不断展望觅食并回应各种环境队列，以最大化他们的生存机会。这反映在单细胞生物物理性Polycephalum中，该骨髓素是已知为优化的网络生长。在这里，我们描述了一种新的生理蛋黄酱的生长模式，其中形成了被称为“卫星”的片状的电动体。只有当营养素稀缺时，才会诱导这种非网络模式形成，表明它是一种紧急响应。我们的目标是构建一种模型来描述基于阴性趋化性的卫星的行为。我们猜测基于扩散的模型，其实现了阈值高于阈值的信号分子的检测。然后我们计算卫星必须行驶的距离，直到浓度信号低于阈值。这些计算的距离与卫星停止的距离很好。基于Akaike的重量分析，我们的阈值模型比我们考虑的其他更好的模型更有可能更好的2.3倍。基于该模型，估计该分子的扩散系数，其对应于典型的信号分子。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号