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Banana anthracnose, caused by Colletotrichum musae, is a major postharvest disease that threatens fruit quality and banana industry sustainability. Phospholipase (PL) plays dual roles in plant disease resistance and pathogen metabolism, acting as a key enzyme in defense responses and as a virulence factor for pathogenic fungi.. Previous studies have shown that PL inhibitors can help maintaining membrane stability under stress conditions. In this study, the inhibitory effects of three PL inhibitors, i.e. quinacrine dihydrochloride (QU), neomycin sulfate (NE), and n-hexanol (Hex), on C. musae were evaluated through in vitro antifungal assays. Results showed that all three inhibitors significantly suppressed mycelial growth and spore production of C. musae. The half-maximal inhibitory concentrations (IC50) for mycelial growth were 1.00 mmol/L (QU), 5.00 mmol/L (NE), and 8.80 mmol/L (Hex). Enzymatic activity assays revealed that QU significantly inhibited both PLA activity in C. musae and banana peel tissues, NE primarily suppressed PLC activity in banana peel, whereas Hex markedly reduced PLD activity in C. musae. Moreover, the appropriate concentrations of the inhibitors (2.00 mmol/L QU, 3.00 mmol/L NE, and 13.20 mmol/L Hex) effectively controlled the development of banana anthracnose. The findings suggested that QU, NE, and Hex suppressed banana anthracnose through distinct mechanisms involving interference with host-pathogen interactions. This study would provide a theoretical basis for the green control of postharvest banana diseases via the targeted regulation of phospholipase activity.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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