Trees might be "aware" of their size
Trees are known for their great, but not unlimited, trunk height and diameter. They have evolved to develop a heavy above-ground biomass, but this integral feature poses a challenge to the trunk’s stability. Despite its evident importance, the principle by which plant stems respond to their increasing weight remains unknown. To address this question, a theory of “vertical proprioception”, a mechanism that balances the radial growth of the stem with the weight increase, has been developed.

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