Evaluation the Effectiveness of Some Amino Acids in Resisting the Fungus F.Oxysporum, Causing Root Rot and Wilt of Tomato Plants

Abstract

This study assessed the effectiveness of glutamic acid (G), proline (P), and tryptophan (T) against Fusarium oxysporum, the causal agent of root rot and wilting disease in tomato plants. Treating tomato plants with P+G and P+G+T mixtures prior to Fusarium inoculation significantly reduced fungal development. Disease incidence was 0.00% in both treatments, compared to 83.33% and 75.45% in untreated plants inoculated with Fusarium. The treatments also notably increased fresh and dry weights, chlorophyll content, and total protein content. Additionally, the treatments induced higher polyphenol oxidase activity (measured as the change in absorbance per minute per gram of fresh weight) compared to the control. These findings suggest that amino acid treatments can promote self-resistance in tomato plants against Fusarium infection.