A new study finds that plants respond to injury by actively redirecting sugars to damaged tissues, helping fuel the regeneration process. Using a fluorescent sensor to track sugar movement in living plants, researchers discovered that wounds trigger a localized shift in energy transport, concentrating glucose around the injury site. The findings offer new insight into how plants coordinate repair and recovery and could help scientists better understand the mechanisms that support resilience in crops facing physical damage or environmental stress.
When a plant is damaged, whether by a storm, an animal, or a gardener's pruning shears, it faces an immediate challenge: how to deliver enough energy to the wounded area to rebuild lost tissue.
A new study reveals how plants solve that problem. The team discovered that injuries trigger a rapid rerouting of sugars, directing energy toward damaged tissues where repair and regeneration are underway.
Using a fluorescent sensor that allowed them to watch sugar movement inside living plants, the researchers found that glucose accumulates around wounds as regeneration progresses. They also identified several genes that help drive this process, providing new insight into how plants recover from injury.
The study, published in PNAS, was led by Ph.D. student Rotem Matosevich and Professor Idan Efroni of the Hebrew University.
Plants produce sugars through photosynthesis and rely on them to fuel growth. Scientists have long known that these sugars are essential for regeneration, but it has remained unclear how plants deliver them to injured tissues.
To investigate, the researchers studied root regeneration in Arabidopsis thaliana, a small flowering plant widely used in biological research. They found that successful regeneration depends on sugars produced by photosynthesis and that limited sugar supplies can slow the repair process.
The team then used a newly adapted fluorescent glucose sensor called Glifon to track sugar movement in real time. The technology allowed them to observe where sugars accumulated as damaged tissues began to regrow.
"We wanted to understand not only whether sugars are required for regeneration, but also where they accumulate and how they move through damaged tissues," Matosevich said.
One surprising finding was that different sugars behaved differently after injury. While regeneration depended on sucrose arriving from photosynthetic tissues elsewhere in the plant, glucose—not sucrose—built up near the wound itself.
Further experiments showed that injury quickly activates genes involved in sugar transport and metabolism. These genes appear to help redirect energy resources toward the damaged area, particularly when sugar is in short supply.
"Our results suggest that injury is accompanied by a rapid and localized change in sugar transport," Efroni said. "Understanding how plants allocate resources during regeneration may help us better understand how growth and repair are coordinated."
The researchers observed similar genetic responses in another type of regeneration process, suggesting that the mechanism may operate across multiple forms of plant wound repair.
The findings could eventually help scientists better understand how crops recover from physical damage caused by wind, hail, pests, agricultural machinery, or routine pruning. They may also shed light on how plants cope with environmental stresses such as drought, heat, and poor soil conditions, when energy resources become limited.
Beyond the biological discovery, the study introduces a powerful new tool for visualizing how sugars move through living plants. Researchers say it could help future studies explore how plants distribute energy during growth, stress, and recovery.
The work offers a new perspective on one of plant biology's central questions: how plants decide where to send their limited energy resources. The answer, it appears, may include a sophisticated system that rapidly channels fuel to where it is needed most.
