School of Environmental Science and Engineering, Changzhou University, Changzhou 213164, China.
College of Agriculture, Guizhou University, Guiyang 550025, China.
Int J Mol Sci. 2023 Feb 22;24(5):4369. doi: 10.3390/ijms24054369.
The effectiveness of nitric oxide (NO) for control of grey spot rot cause by in harvested loquat fruit and its probable mechanisms have been investigated. The results showed that NO donor sodium nitroprusside (SNP) did not evidently inhibit mycelial growth and spore germination of , but resulted in a low disease incidence and small lesion diameter. SNP resulted in a higher hydrogen peroxide (HO) level in the early stage after inoculation and a lower HO level in the latter period by regulating the activities of superoxide dismutase, ascorbate peroxidase and catalase. At the same time, SNP enhanced the activities of chitinase, β-1,3-glucanase, phenylalanine ammonialyase, polyphenoloxidase, and total phenolic content in loquat fruit. However, SNP treatment inhibited the activities of cell wall-modifying enzymes and the modification of cell wall components. Our results suggested that NO treatment might have potential in reducing grey spot rot of postharvest loquat fruit.
研究了一氧化氮（NO）对采后枇杷果实灰斑病的防治效果及其可能的作用机制。结果表明，NO 供体硝普钠（SNP）对病原菌菌丝生长和孢子萌发没有明显抑制作用，但显著降低了果实的发病率和病斑直径。SNP 通过调节超氧化物歧化酶、抗坏血酸过氧化物酶和过氧化氢酶的活性，导致接种后早期过氧化氢（H2O2）水平升高，后期 H2O2 水平降低。同时，SNP 增强了枇杷果实中几丁质酶、β-1,3-葡聚糖酶、苯丙氨酸解氨酶、多酚氧化酶和总酚含量的活性。然而，SNP 处理抑制了细胞壁修饰酶的活性和细胞壁成分的修饰。研究结果表明，NO 处理可能有助于减少采后枇杷果实的灰斑病。
