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DOI:	10.1371/journal.pone.0140428
论文题名:	Inferring Models of Bacterial Dynamics toward Point Sources
作者:	Hossein Jashnsaz; Tyler Nguyen; Horia I. Petrache; Steve Pressé
刊名:	PLOS ONE
ISSN:	1932-6203
出版年:	2015
发表日期:	2015-10-14
卷:	10, 期:10
语种:	英语
英文关键词:	Predation ; Chemotaxis ; Volcanoes ; Flagellar rotation ; Predator-prey dynamics ; Random walk ; Statistical distributions ; Bdellovibrio
英文摘要:	Experiments have shown that bacteria can be sensitive to small variations in chemoattractant (CA) concentrations. Motivated by these findings, our focus here is on a regime rarely studied in experiments: bacteria tracking point CA sources (such as food patches or even prey). In tracking point sources, the CA detected by bacteria may show very large spatiotemporal fluctuations which vary with distance from the source. We present a general statistical model to describe how bacteria locate point sources of food on the basis of stochastic event detection, rather than CA gradient information. We show how all model parameters can be directly inferred from single cell tracking data even in the limit of high detection noise. Once parameterized, our model recapitulates bacterial behavior around point sources such as the “volcano effect”. In addition, while the search by bacteria for point sources such as prey may appear random, our model identifies key statistical signatures of a targeted search for a point source given any arbitrary source configuration.
URL:	http://journals.plos.org/plosone/article/file?id=10.1371/journal.pone.0140428&type=printable
Citation statistics:
资源类型:	期刊论文
标识符:	http://119.78.100.158/handle/2HF3EXSE/21790
Appears in Collections:	过去全球变化的重建影响、适应和脆弱性科学计划与规划气候变化与战略全球变化的国际研究计划气候减缓与适应气候变化事实与影响

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File Name/ File Size	Content Type	Version	Access	License
journal.pone.0140428.PDF（4069KB）	期刊论文	作者接受稿	开放获取	CC BY-NC-SA	View Download

作者单位:

Physics Dept., Indiana Univ. - Purdue Univ. Indianapolis, Indianapolis, IN, 46202, United States of America;Stark Neuroscience Institute, Indiana Univ. School of Medicine, Indianapolis, IN 46202, United States of America;Physics Dept., Indiana Univ. - Purdue Univ. Indianapolis, Indianapolis, IN, 46202, United States of America;Physics Dept., Indiana Univ. - Purdue Univ. Indianapolis, Indianapolis, IN, 46202, United States of America;Dept. of Cell and Integrative Physiology, Indiana Univ. School of Medicine, Indianapolis, IN 46202, United States of America

Recommended Citation:

Hossein Jashnsaz,Tyler Nguyen,Horia I. Petrache,et al. Inferring Models of Bacterial Dynamics toward Point Sources[J]. PLOS ONE,2015-01-01,10(10)

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