Melatonin and fungal metabolites synergistically enhance tomato tolerance to Cd and disease resistance by regulating phytohormones

文献类型： 外文期刊

第一作者： Liu, Bei

作者： Liu, Bei;Chen, Wei;You, Lixin;Qu, Xiaojie;Liu, Bei;Geng, Hui;Zhou, Yuming

作者机构：

关键词： Gene expression; Jasmonic acid; Antioxidant; Antibacterial; Bacterial wilt

期刊名称：SCIENTIA HORTICULTURAE （ 影响因子：4.3； 五年影响因子：4.5 ）

ISSN： 0304-4238

年卷期： 2024 年 327 卷

页码：

收录情况： SCI

摘要： Mitigating biotic and abiotic stresses of plants through natural products is an environmental friendly and chemical free approach. In this study, the synergistic effect of exogenous application of melatonin (MT) and fungal metabolites (FM) were evaluated for their mitigation affects against bacterial wilt disease and cadmium toxicity in tomato plants. By using a multi-faceted approach including phytohormonal profiling, quantitative real -time PCR, biochemical assays, antibacterial test, and cadmium (Cd) content evaluation in plants, we presented evidence that MT and FM augmented disease resistance, tolerance to Cd toxicity and the combined treatment caused significantly increased effect by regulating phytohormone expression. Transcription of the genes related to the jasmonic acid (JA) and salicylic acid (SA) were enhanced while genes related to ethylene (ET) were decreased, which caused an increased JA and SA content and decrease in ET level. The plants treated with MT and FM showed significant reduction in disease intensity and Cd content compared to the control. Moreover, analyses indicated that the application of MT and FM reduced oxidative damage and increased antioxidant enzymes activity. The increased synergistic impact of MT and FM is supposed to be due to blending action mechanisms like resistance induction and enhanced growth impact of MT and antibacterial action of FM against R. solanacearum. These research findings emphasize the efficacy of a sustainable and comprehensive strategy in controlling bacterial wilt and Cd toxicity in tomato plants.

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