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作者机构:BioFrontiers Institute University of Colorado BoulderCO United States School of Plant Science and Food Security Tel Aviv University Tel Aviv Israel Zukunftskolleg Department of Biology University of Konstanz Konstanz Germany Centre for the Advanced Study of Collective Behaviour Konstanz Germany Department of Computer Science University of Colorado BoulderCO United States Department of Physics University of Colorado BoulderCO United States Department of Applied Math University of Colorado BoulderCO United States Department of Ecology and Evolutionary Biology University of Colorado BoulderCO United States Santa Fe Institute Santa FeNM United States
出 版 物:《arXiv》 (arXiv)
年 卷 期:2022年
核心收录:
主 题:Velocity distribution
摘 要:Circumnutations are widespread in plants and typically associated with exploratory movements, however a quantitative understanding of their role remains elusive. In this study we report, for the first time, the role of noisy circumnutations in facilitating an optimal growth pattern within a crowded group of mutually shading plants. We revisit the problem of self-organization observed for sunflowers, mediated by shade response interactions. Our analysis reveals that circumnutation movements conform to a bounded random walk characterized by a remarkably broad distribution of velocities, covering three orders of magnitude. In motile animal systems such wide distributions of movement velocities are frequently identified with enhancement of behavioral processes, suggesting that circumnutations may serve as a source of functional noise. To test our hypothesis, we developed a parsimonious model of interacting growing disks, informed by experiments, successfully capturing the characteristic dynamics of individual and multiple interacting plants. Employing our simulation framework we examine the role of circumnutations in the system, and find that the observed breadth of the velocity distribution confers advantageous effects by facilitating exploration of potential configurations, leading to an optimized arrangement with minimal shading. These findings represent the first report of functional noise in plant movements, and establishes a theoretical foundation for investigating how plants navigate their environment by employing computational processes such as task-oriented processes, optimization, and active sensing. (218 words) Copyright © 2022, The Authors. All rights reserved.