By Jamie Martin
Scientists have discovered that plants can detect nearby plant growth using scent signals and adjust their own development in response. This finding improves understanding of plant behavior and competition in agricultural systems.
The signals involved are called volatile organic compounds, or VOCs. These are natural chemicals released into the air by plants. They help plants communicate with insects, pollinators, and surrounding plants.
Until now, most research has focused on damaged plants sending warning signals. This study reveals that even healthy plants release scent signals that influence neighboring plants’ growth strategies.
“Healthy non-damaged plants are constantly releasing their own chemical ‘fingerprint’ into the air, and their neighbors actively read these signals to adjust not only their defenses, but their entire growth strategy,” said author Dr Velemir Ninkovic from the Swedish University of Agricultural Sciences.
“This is like a continuous conversation between neighbor's, and the finding that these background VOCs can reshape growth and gene activity opens up a new dimension in how we understand plant communication,” said Ninkovic.
During the experiments, plants were exposed to scents from different barley types. Results showed that plants increased growth when exposed to fast-growing neighbors. In contrast, they reduced growth and focused on defense when exposed to slower-growing plants.
These changes affected the entire plant, including roots, stems, and leaves. Researchers also found that gene activity played a key role, with different genes controlling growth and defense responses depending on the signals received.
Important compounds involved in this process include benzyl nitrile, linalool, and octanal. These chemicals are also commonly found in plant scents used in products like perfumes and cleaning items.
The findings suggest that plant communication through scent is a natural and widespread process. This knowledge may help farmers improve planting patterns, manage crop competition, and enhance overall farm productivity.
Photo Credit: istock-pkujiahe
Categories: National