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The coding of object thickness in plants: When roots matter.
Silvia Guerra1, Bianca Bonato1, Qiuran Wang1
1Department of General Psychology, University of Padova.
Journal of Comparative Psychology (Washington, D.C. : 1983)
|August 19, 2021
Summary
Climbing plants sense stimulus thickness using their root systems. This allows tendrils to plan movements, but only when roots can detect the stimulus.
Area of Science:
- Plant Biology
- Biophysics
- Mechanosensation
Background:
- Climbing plants utilize tendrils for support and host interaction.
- Plants exhibit stimulus-dependent tendril movement, but sensing mechanisms are unclear.
Purpose of the Study:
- Investigate the role of the root system in climbing plant thickness sensing.
- Determine if roots mediate tendril kinematic responses to stimulus thickness.
Main Methods:
- Employed three-dimensional kinematical analysis in pea plants (Pisum sativum L.).
- Conducted experiments with stimuli presented at different heights to assess root involvement.
- Compared tendril movement patterns when roots could and could not sense the stimulus.
Main Results:
- Tendril kinematics were significantly influenced by stimulus thickness when the root system could access the stimulus.
- Tendril movement responses to thickness were abolished when the stimulus was inaccessible to the roots.
- Root system presence is critical for sensing stimulus thickness.
Conclusions:
- The root system plays a crucial role in perceiving stimulus thickness for climbing plants.
- Root-sensed information influences the planning and execution of tendril reach-to-grasp movements.
- This study elucidates a novel sensory mechanism in plant-host interactions.
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