Soybeans and smoke
Ferrieri, a research professor in the Department of Chemistry and investigator at the University of Missouri Research Reactor (MURR), said when the team added liquid smoke to the soil where a plant is growing, the researchers found it could enhance the plant’s natural defenses and increase its ability to resist pests and diseases. Liquid smoke, created by condensing smoke from burning wood, was used to provide a simulation — in a laboratory setting — of the smoky conditions a wildfire could create.
“Plants can’t run away when they are trying to defend themselves from an active threat,” said Ferrieri, who is also a member of the Interdisciplinary Plant Group at MU. “Therefore, it takes a lot of energy for a plant to dedicate precious resources it would normally dedicate to its growth to now defend itself. Much like the human body, a key to plant health lies in how well its vascular system can function under stress and move precious resources to the different growing parts.”
In this study, scientists used the radioisotope carbon-11 — created by a cyclotron at MURR — to help them trace how smoke impacts a sunflower’s vascular system, or the system that transports carbon, water and micronutrients throughout the plant. Ferrieri said they found that sunflowers grown in soil treated with liquid smoke had larger, thicker, and greener leaves and appeared less prone to pests and disease.
“Plants harness the energy of the sun, fix carbon dioxide and make sugars that are transported throughout the plant using their vascular system,” Ferrieri said. “By feeding carbon dioxide gas containing carbon-11 to a common domesticated variety of sunflower, we were able to create a physical map of where the sugars go using radiographic imaging. This allowed us to evaluate the effects of smoke on vascular transport.”
The Plant Radiotracer Laboratory at MURR largely includes an array of equipment that was moved to MU from the U.S. Department of Energy’s Brookhaven National Laboratory after more than 30 years. Inside the lab, Ferrieri has been using carbon-11, along with other radioisotopes produced at MURR, to study how plants respond to stresses imposed by their environment.
Mary Benoit, a co-author on this study, is one of Ferrieri’s former students at MU. Based on a suggestion from Ferrieri, Benoit started working on the original topic while she was at MU. After Benoit graduated in May 2022, Randi Noel joined Ferrieri’s lab to continue the research. Noel, a sophomore and current undergraduate researcher in Ferrieri’s lab, said the experience has fostered her inquisitive nature of being the first to learn about new things.
“The fact that I get to be one of the people on this study that could have major implications on crops is really neat,” said Noel, the first author on the study who is also pursuing a bachelor’s degree in plant sciences.