In addition to PGPMs, the team applied natural algae-derived treatments to the tomato crops, which act as biostimulants to further promote plant health. These treatments improve processes like nutrient absorption and stress tolerance, supporting overall crop performance.
"Algae extracts are considered a rich source of plant biostimulants and provide a renewable option for improving crop quality and yield," explained Radicetti. "Even at low doses, they have the capacity to support plant development, especially under stressed conditions, which are becoming more frequent with climate change."
The study found that PGPMs significantly improved root development, shoot biomass, and overall health of tomato plant seedlings. "We observed well-developed root systems in tomato crops just 30 days after transplanting, demonstrating the function of PGPMs in mitigating transplanting stress," Radicetti explained.
The highest crop yield, 67.2 tons per hectare, was achieved with a combined application of a PGPM product called MYCOUP and a 1.0% algae-based biostimulant. "The results were evident," Radicetti noted, "and we were fascinated by the idea that an environmentally-friendly approach like this could produce such strong results."
Looking ahead, the researchers believe that the use of PGPMs and algae-based biostimulants can be easily adopted. However, Radicetti stresses the need for further studies, saying, "More research is needed to evaluate their full potential, especially under stressed conditions like drought, which will be a major concern in the coming years."
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