2017 Volume 83 Issue 1 Pages 3-9
Because l-methionine has been reported to have an inhibitory effect on disease, here we tested l-methionine for a direct antifungal effect on Fusarium oxysporum f. sp. lycopersici (FOL), cause of Fusarium wilt, and an inhibitory effect on the disease. l-Methionine had no observable effect on mycelial growth or bud cell germination of FOL Treatment of tomato leaves with 100 μg/mL l-methionine reduced disease severity caused by FOL. Two days after inoculation, total RNA was extracted from roots and analyzed by quantitative PCR for expression of several defense-related genes; expression of multiple PR genes increased after l-methionine treatment, suggesting that l-methionine treatment of tomato plants may induce resistance to Fusarium wilt by a priming effect.
