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由于Nigrospora oryzae引起的叶病的生物控制机制

Jin Han¹, Zhantong Lu¹, Huifang Zhang²

¹College of Forestry, Shenyang Agricultural University, Shenyang, China.

Physiologia plantarum

|October 2, 2024

概括

这项研究引入了Trichoderma菌株作为对叶病的生物控制,这种病是由Nigrospora oryzae引起的. 这些治疗方法显著促进了的生长和防御机制,提供了一个有希望的环保解决方案.

科学领域:

植物病理学植物病理学
微生物生态学微生物生态学
生物技术是生物技术.

背景情况:

尼格洛斯波拉菌 (Nigrospora oryzae) 引起大树叶,影响树木的生长.
生物控制为植物疾病的化学治疗提供了一个可持续的替代方案.

研究的目的:

为了识别和表征主导的Trichoderma菌株用于生物控制树叶病.
评估Trichoderma在缓解N. oryzae感染和促进树生长方面的有效性.

主要方法:

双培养试验,VOC分析和培养过物被用于表征Trichoderma菌株.
达维迪亚 (Populus davidiana) × 阿尔巴 (P. alba var.) 这一类植物. 皮拉米达利斯 (PdPap) 苗木经过Trichoderma菌株的预处理.
生物化学测定测量了反应性氧物种 (ROS),过氧化酶 (POD),超氧化物脱酶 (SOD) 和MDA含量.
分析了 Salicylic 酸 (SA) 和 jasmonic 酸 (JA) 途径,以及与发病相关的 (PR) 和 MYC-R 基因表达.
评估了生长参数,包括侧根,生物质,口腔和土壤pH值.

主要成果:

特里科德玛菌株对N. oryzae的生物控制疗效超过60%.
用Trichoderma预处理降低了ROS含量和MDA水平,同时增加了PdPap叶中的POD和SOD活性.
结合的Trichoderma治疗 (Tcom) 显著提高了SA/JA通路,PR蛋白和MYC-R表达的调节.
应用Trichoderma增强了横向根形成,地表生物质,口腔密度,并改善了土壤pH值以促进苗木生长.

结论:

主导的Trichoderma菌株有效控制叶病并促进植物生长.
三皮增强的防御机制和生理过程.
与单个菌株相比,Trichoderma联合治疗提供了优越的生物控制和增长促进.

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