Encapsulated Growth - Protecting Plants with Bacteria
A team of researchers at North Carolina State University has successfully developed a technique for encapsulating beneficial bacteria that boost plant growth and protect against pests. This breakthrough allows these bacteria to be applied alongside agrochemicals, making it possible to enhance crop yields sustainably.
“Many of the beneficial bacteria we know of are fairly fragile, making it difficult to incorporate them into practical, shelf-stable products,” says John Cheadle, co-lead author of the study and a Ph.D. student at NC State. The new technique stabilizes these bacteria, allowing them to be used as probiotics for plants.
The technique uses a custom-made emulsion, combining a saline solution with plant growth-promoting bacteria (PGPBs) and biodegradable oils and polymers. This ensures that the bacteria remain alive and functional when applied with agrochemicals like fertilizers and pesticides.
In their tests, the researchers demonstrated that bacteria such as Pseudomonas simiae and Azospirillum brasilense thrived in the emulsion, with survival rates significantly higher than those in saline solutions alone. The emulsion also allowed for gradual pesticide release, offering extended protection from pests.
“Ultimately, our technique enables us to incorporate several active ingredients into one delivery system, allowing the PGPBs to survive and thrive,” says Mariam Sohail, co-lead author.
The team plans to conduct further testing in greenhouse environments and with various plant species. This innovative technique could lead to reduced chemical use on farms, contributing to more sustainable agricultural practices.