Researchers at Cornell University discovered that applying specific ultrasonic frequencies (between 20 and 50 kHz) to tomato leaves increased the rate of photosynthesis by 50% and overall growth by 15%. This phenomenon, termed 'sonophotosynthesis', occurs because acoustic vibrations disrupt thin layers of air on the leaf surface, facilitating greater carbon dioxide (CO₂) absorption and improving stomatal opening.
The team, led by Dr. Robbins, used piezoelectric transducers to emit sounds that were inaudible to humans. The results, published in Nature Communications (2022), showed an increase in biomass production and faster fruit development. The technique is particularly promising for CO₂-limited environments, such as controlled greenhouses or vertical hydroponic farming systems, where optimizing every gas molecule is crucial.
- Measured effect: 50% more photosynthesis, 15% more growth.
- Optimal frequency: 20-50 kHz (ultrasonic).
- Mechanism: Reduction of the air boundary layer and improved CO₂ diffusion.
- Key application: Precision agriculture and crops in harsh environments (such as Mars).
This finding will not only transform agriculture, but also suggests that plants, while not "hearing" like we do, respond physically and quantically to the vibrations in their environment, opening a new field in acoustic bioengineering.
Source: Robbins, M. P., et al. (2022). 'Sonically enhanced photosynthesis and growth in tomato plants'. Nature Communications.
