Surface Acoustic Waves to Drive Plant Transpiration

Area of Science:

• Plant science
• Nanotechnology
• Biophysics

Background:

• Electronic plants (e-plants) and agro-nanotechnology aim for advanced control over plant physiology and products.
• Current systems rely on the plant vascular system (xylem/phloem) for transport, limiting precise control.
• External energy sources offer potential for direct manipulation of plant fluid transport.

Purpose of the Study:

• To investigate the direct control of fluid transport in plants using external acoustic energy.
• To assess the efficacy of surface acoustic waves in enhancing localized water and solute delivery within plant leaves.
• To explore the potential of acoustic energy for advanced applications in e-plants and agro-nanotechnology.

Main Methods:

• Coupling surface acoustic waves generated from piezoelectric substrates directly into rose leaves.
• Utilizing fluorescent imaging to quantify water and solute transport rates.
• Comparing acoustic energy-induced transport with normal plant transpiration and heat-assisted evaporation.

Main Results:

• Acoustic energy induced rapid, localized water evaporation in rose leaves at the point of contact.
• The technique reliably increased water/solute delivery up to 6x normal transpiration rates.
• Acoustic energy-assisted transport was 2x more effective than heat-assisted evaporation.

Conclusions:

• Acoustic energy provides a novel method for directly controlling fluid transport in plants.
• This technique enables high spatiotemporal resolution delivery of biomolecules, agrochemicals, or electronic materials.
• The findings pave the way for more sophisticated plant-cyborg interactions and advanced agricultural technologies.