Temporal Dynamics With and Without a Nervous System: Plant Physiology, Communication, and Movement

The concept of time has long been the subject of complex philosophical reflections and scientific research, which have interpreted it differently based on the starting question, context, and level of analysis of the system under investigation. In the present review, we first explore how time has been studied among different scientific fields such as physics, neuroscience, and bioecological sciences. We emphasize the fundamental role of an organism's ability to perceive the passage of time and dynamically adapt to its environment for survival. Growth, reproduction, and communication processes are subject to spatiotemporal variability, and the sense of time allows organisms to structure their interactions, track past, and anticipate future events. Specifically, building on a relational and multilevel approach, this paper proposes an analysis of various aspects of the temporal dimension of plants-ranging from their growth and adaptation rates to behavioral strategies and modes of communication-culminating in a focused examination of research based on the kinematical analysis of plant movement. By adopting a comparative and critical approach, we raise several questions about the temporality of processes from different perspectives. Further insights into the timing of physiological and communication processes in plants will help to recognize the central role of temporality in life and to discover mechanisms, processes, and behavioral strategies that may be common (or similar) across species or unique (species-specific) for some organisms, both with and without nervous systems.