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Pattern-Triggered Oxidative Burst and Seedling Growth Inhibition Assays in Arabidopsis thaliana

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Can Mimosa pudica Plants Enumerate Light Exposure Events?

Peter M Vishton¹, Paige J Bartosh¹

¹Department of Psychological Sciences, William & Mary.

Cognitive Science

|December 29, 2025

Summary

Mimosa pudica plants demonstrate an ability to count light exposure events, adjusting their nyctinastic movements to predict light availability. This plant behavior suggests a form of information processing beyond simple environmental responses.

Keywords:

Enumeration Extra‐neuronal learning Plant cognition Plant learning

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Area of Science:

Plant Biology
Environmental Sensing
Information Processing in Non-neuronal Tissues

Background:

Plants possess sophisticated mechanisms to sense and respond to environmental cues.
Understanding the limits of plant information processing is an active area of research.
Nyctinastic movements, or daily rhythms of leaf and petal movement, are key plant responses.

Purpose of the Study:

To investigate whether Mimosa pudica plants can process and respond to the number of illumination events.
To determine if plant movements are mediated by temporal factors or event enumeration.
To explore the potential for non-neuronal tissues to process enumeration-related information.

Main Methods:

Mimosa pudica plants were exposed to repeating light-light-dark cycles over 15 days.
Day and night cycle lengths were manipulated to differentiate between temporal sensing and event counting.
Plant movement patterns were analyzed in response to varying light exposure durations and frequencies.

Main Results:

Plants adjusted their nyctinastic movements to anticipate the light-dark pattern, indicating a response to illumination events.
Movement patterns shifted logarithmically over 15 days, suggesting an adaptive learning process.
Plants generalized movement responses even after abrupt changes in day-night cycle lengths, supporting event enumeration over strict temporal tracking.

Conclusions:

Mimosa pudica plants exhibit evidence of processing information related to the number of light exposure events.
The study suggests that plants may possess capabilities for enumeration, a form of information processing previously thought to be limited to neuronal tissues.
Further research with additional controls is recommended to confirm these findings and explore implications for other non-neuronal systems.