In the Annals of Botany, European and Japanese scientists used anesthesia to alter the growth and motion of various plants. Some plants were placed in a sealed chamber with a flask of ether. Others had their roots soaked in lidocaine. What they found was quite amazing.
Venus flytraps no longer clamped shut when their trigger hairs were stimulated. Pea plants maintained their curls and wouldn't grow straight until after the anesthetics were removed. Mimosa plants lost their ability to shut their leaves when physically touched.
They were able to measure a decrease in the action potential in the venus flytraps with exposure to anesthesia. After the ether was removed, the action potentials returned within a few hours. The researchers found other abnormalities in the cellular components when the plants were exposed to anesthesia.
Since we still have no clear idea how anesthesia works, this discovery could open up more pathways to understanding how these chemicals affect us without actually subjecting us to experimentation.