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How some plants spread their seeds: Ready, set, catapult
Date:11/3/2010

tween plants utilizing ballistic methods and closely related plants that do not, can provide a deeper understanding of the evolution of ballistic mechanisms and the properties required for energy storage and transference.

Seed dispersal has been studied extensively in the model plant Arabidopsis thaliana, a close relation to Cardamine. Like most other members of the Brassicacae, A. thaliana does not disperse its seeds via catapulting. Instead, the seeds are dropped to the ground as the silique dehisces and splits. Despite these differences in seed dispersal mechanisms, the siliques of C. parviflora and A. thaliana are morphologically similar. One difference is the persistence of second layer on the inner surface of the valve in C. parviflora that degenerates in A. thaliana during maturation. This additional layer likely plays a role in valve coiling.

"Ultimately it will be important to analyze the spring-structures at a tissue and cellular level to determine precisely how they store such impressive amounts of energy," Ellerby said. "This could inform the design of human-engineered structures for absorbing or storing elastic energy."


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Contact: Richard Hund
rhund@botany.org
315-577-9557
American Journal of Botany
Source:Eurekalert  

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