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When two become one: perceptual completion in pea plants.

Silvia Guerra¹, Bianca Bonato¹, Laura Ravazzolo²

¹Department of General Psychology, University of Padova, Padova, Italy.

Plant Signaling & Behavior

|March 13, 2025

Summary

Pea plants can integrate sensory information from both roots and shoots to perceive and climb supports, demonstrating a remarkable ability for perceptual completion. This finding highlights complex signaling networks in plant behavior.

Keywords:

Approach-to-clasp movement Pisum sativum L.climbing plants kinematical analysis perceptual completion plant behavior plant movement

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Area of Science:

Plant biology
Sensory perception in plants
Plant biomechanics

Background:

Climbing plants utilize external structures for support to access light.
Environmental obstacles can hinder complete perception of potential supports.
Plants may need to perform perceptual completion to form a unified percept.

Purpose of the Study:

To investigate if pea plants can perform perceptual completion.
To analyze ascent and attachment behavior in response to divided supports.

Main Methods:

Three-dimensional (3D) kinematic analysis of pea plant behavior.
Experimental setup with divided supports perceived by different plant parts (root and aerial).
Inclusion of control conditions for comparison.

Main Results:

Pea plants demonstrated successful clasping of divided supports.
Evidence suggests integration of information from root and aerial perception.
Plants did not exhibit disoriented exploratory behavior.

Conclusions:

Pea plants are capable of perceptual completion, integrating root and aerial sensory input.
Perceptual completion likely involves crosstalk between plant modules via signaling networks.
Findings contribute to understanding support detection and coding in climbing plants.