Newly Discovered Plant Communication Method

This isn’t a new method plants use to communicate with each other, because they have been using it for who knows how long. But for scientists, it’s a newly discovered plant communication method.

The natural world is filled with astonishing forms of communication, and plants are no exception. We have mentioned before that plants communicate underground with the aid of fungi and mycorrhizal networks in what some have called the “woods-wide-web.” They also communicate by releasing chemicals into the air. We have even seen that they communicate with insects by means of sounds. Plant communication does not involve images, spoken words, or written texts, but can still be considered communication.

Plants communicate primarily through chemical signals. When a plant experiences stress—such as an attack by herbivorous insects—it may release volatile organic compounds (VOCs) into the air. These airborne chemicals can be detected by neighboring plants, which may then activate their own defense mechanisms preemptively. This method of plant communication has sometimes been described as “eavesdropping.”

The newly discovered plant communication method involves electrical signals passing from plant to plant when leaves touch. Ron Mittler and colleagues at the University of Missouri in Columbia experimented by growing thale cress (Arabidopsis thaliana). They grew some plants in isolation and some in dense patches where the leaves touched. Then they stressed the plants by exposing them to excess light. The plants that were grouped together showed less stress damage than the ones in isolation. The researchers analyzed gene expression in isolated plants and in plants that were touching. They also monitored signals passed between the grouped pants.

According to the report, the plants with leaves touching activated over 2,000 stress-response genes that could help to protect them from excess light, cold, salinity, and wounding. The isolated plants showed greater cell damage under stressful conditions.

Understanding plant communication opens new doors for agriculture, conservation, and our appreciation of design in the natural world. Mittler hopes that this newly discovered plant communication method may be used to design mixed plant communities that are more resilient, perhaps reducing the need for chemical pesticides or fertilizers. We believe that God has given us the tools and the talent to reveal new strategies for ecosystem management and food production.

— Roland Earnst © 2026

Reference: sciencenews.org