气候变化领域集成服务门户(CCPortal): Mechanism of signal propagation in Physarum polycephalum

CCPortal

DOI	10.1073/pnas.1618114114
	Mechanism of signal propagation in Physarum polycephalum
	Alim K.; Andrew N.; Pringle A.; Brenner M.P.
发表日期	2017
ISSN	0027-8424
起始页码	5136
结束页码	5141
卷号	114 期号:20
英文摘要	Complex behaviors are typically associated with animals, but the capacity to integrate information and function as a coordinated individual is also a ubiquitous but poorly understood feature of organisms such as slime molds and fungi. Plasmodial slime molds grow as networks and use flexible, undifferentiated body plans to forage for food. How an individual communicates across its network remains a puzzle, but Physarum polycephalum has emerged as a novel model used to explore emergent dynamics. Within P. polycephalum, cytoplasm is shuttled in a peristaltic wave driven by cross-sectional contractions of tubes. We first track P. polycephalum's response to a localized nutrient stimulus and observe a front of increased contraction. The front propagates with a velocity comparable to the flow-driven dispersion of particles. We build a mathematical model based on these data and in the aggregate experiments and model identify the mechanism of signal propagation across a body: The nutrient stimulus triggers the release of a signaling molecule. The molecule is advected by fluid flows but simultaneously hijacks flow generation by causing local increases in contraction amplitude as it travels. The molecule is initiating a feedback loop to enable its own movement. This mechanism explains previously puzzling phenomena, including the adaptation of the peristaltic wave to organism size and P. polycephalum's ability to find the shortest route between food sources. A simple feedback seems to give rise to P. polycephalum's complex behaviors, and the same mechanism is likely to function in the thousands of additional species with similar behaviors.
英文关键词	Acellular slime mold; Behavior; Taylor dispersion; Transport network
语种	英语
scopus关键词	animal behavior; Article; cytoplasm; dispersion; feedback system; flow rate; mathematical model; nonhuman; nutrient; oscillation; peristalsis; Physarum polycephalum; priority journal; signal transduction; viscosity; biological model; Physarum polycephalum; physiology; Models, Biological; Physarum polycephalum; Signal Transduction
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/160637
作者单位	Alim, K., Kavli Institute for Bionano Science and Technology, Harvard John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, United States, Max Planck Institute for Dynamics and Self-Organization, Goettingen, 37077, Germany; Andrew, N., Kavli Institute for Bionano Science and Technology, Harvard John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, United States, Max Planck Institute for Dynamics and Self-Organization, Goettingen, 37077, Germany; Pringle, A., Department of Botany, University of Wisconsin-Madison, Madison, WI 53706, United States, Department of Bacteriology, University of Wisconsin-Madison, Madison, WI 53706, United States; Brenner, M.P., Kavli Institute for Bionano Science and Technology, Harvard John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, United States
推荐引用方式 GB/T 7714	Alim K.,Andrew N.,Pringle A.,et al. Mechanism of signal propagation in Physarum polycephalum[J],2017,114(20).
APA	Alim K.,Andrew N.,Pringle A.,&Brenner M.P..(2017).Mechanism of signal propagation in Physarum polycephalum.Proceedings of the National Academy of Sciences of the United States of America,114(20).
MLA	Alim K.,et al."Mechanism of signal propagation in Physarum polycephalum".Proceedings of the National Academy of Sciences of the United States of America 114.20(2017).