Related Experiment Video
Updated: Jul 3, 2025

Fruit Volatile Analysis Using an Electronic Nose
Published on: March 30, 2012
Growth and tension in explosive fruit
Gabriella Mosca1, Ryan C Eng2, Milad Adibi2
1Max Planck Institute for Plant Breeding Research, Carl-von-Linné-Weg 10, 50829 Köln, Germany; Technical University of Munich, 85748 Garching b. Munich, Germany.
Explosive seed dispersal in Cardamine hirsuta is powered by tension from actively growing fruit cells. Microtubule reorientation and cell wall structure enable this remarkable plant mechanism.
Area of Science:
- Plant biology
- Biomechanics
- Cellular mechanics
Background:
- Cardamine hirsuta (hairy bittercress) exhibits explosive seed dispersal.
- Seed ejection is driven by tension in the fruit valves.
- Unlike other plants, tension in C. hirsuta is not generated by drying but by active cell growth.
Purpose of the Study:
- To investigate the mechanism by which growing exocarp cells generate tension for explosive seed dispersal in C. hirsuta.
- To understand the role of microtubules and cell wall structure in this process.
Main Methods:
- Investigated microtubule reorientation in exocarp cells.
- Utilized mechanical modeling to simulate tension generation during growth.
- Analyzed the role of cellulose microfibril orientation and cell wall layering.
Main Results:
- Microtubule reorientation alters cellulose microfibril alignment in the cell wall.
- Anisotropic cellulose microfibril orientation and cell shape changes lead to tension during growth.
- A multi-layered cell wall with a cross-lamellate pattern of cellulose microfibrils enhances tension development.
Conclusions:
- The interplay between cell wall properties and turgor-driven growth generates the tension for explosive seed dispersal.
- This mechanism highlights a novel strategy for plant seed dispersal.
Related Concept Videos
Fruit Development, Structure, and Function
Tonicity in Plants
Meristems and Plant Growth
Responses to Gravity and Touch
Primary and Secondary Growth in Roots and Shoots
Muscle Stimulation Frequency
Wave summation
At low firing rates, motor neurons induce individual twitch contractions in muscle fibers. These twitches...

