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Effect of temperature on Fusarium solani and F. tricinctum growth and disease development in soybean
Canadian Journal of Plant Pathology ( IF 2 ) Pub Date : 2020-05-07 , DOI: 10.1080/07060661.2020.1745893
Hui Yan 1 , Berlin Nelson 1
Affiliation  

Abstract Fusarium solani and F. tricinctum are important root rot pathogens of soybean in the northern Great Plains of North America. The role of temperature on their growth was investigated in vitro at temperatures between 0 to 35ºC, while disease development in the soybean cultivar ‘Barnes’ was tested at 15°C, 20°C, 25°C and 30°C using several methods over 1 to 4 weeks. All experiments were conducted in a growth chamber. The effect of temperature on mycelial growth was modelled using an asymmetric logistic single peak model, which described fungal growth rate at temperatures of 8.5–34.3°C for F. solani and 3.1–32.2°C for F. tricinctum. The non-linear model estimated 29.3°C as the optimum temperature for growth of F. solani, and 24.4°C for F. tricinctum. Temperature had a significant effect on disease development in cotyledons and roots after 1-week incubation in rolled germination paper. The most favourable temperature for disease in cotyledons was 30°C for F. solani and 25°C for F. tricinctum. For roots, the optimal temperature for F. solani was also 30°C, but root disease by F. tricinctum was highest at 15°C. In infested soil after 4 weeks, lesion lengths on roots were longer and disease incidence was greater for F. solani at 30°C versus lower temperatures, whereas for F. tricinctum the optimum temperature for root disease was 15°C. The thermal specific characteristics of these pathogens implied disease development by F. solani is favoured by warmer temperatures, while in F. tricinctum it is favoured by cooler temperatures.

中文翻译:

温度对大豆镰刀菌和三色镰刀菌生长及病害发生的影响

摘要 Fusarium solani和F. tricinctum是北美大平原北部大豆的重要根腐病菌。在 0 到 35ºC 之间的温度下体外研究了温度对其生长的作用,同时使用多种方法在 15°C、20°C、25°C 和 30°C 下测试了大豆品种“Barnes”的病害发展。 1 到 4 周。所有实验均在生长室中进行。温度对菌丝体生长的影响使用不对称逻辑单峰模型进行建模,该模型描述了温度为 8.5-34.3°C 的 F. solani 和 3.1-32.2°C 的 F. tricinctum 的真菌生长速率。非线性模型估计 29.3°C 是 F. solani 生长的最佳温度,24.4°C 是 F. tricinctum。在卷起的发芽纸中培养 1 周后,温度对子叶和根的病害发展有显着影响。F. solani 和 F. tricinctum 的最适宜温度为 30°C 和 25°C。对于根,F. solani 的最适温度也是 30°C,但 F. tricinctum 的根病在 15°C 时最高。在 4 周后受侵染的土壤中,与较低温度相比,F. solani 在 30°C 下根部的病斑长度更长,发病率更高,而对于 F.tricinctum,根病的最适温度为 15°C。这些病原体的热特异性特征暗示 F. solani 的疾病发展受较高温度的青睐,而在 F. tricinctum 中,它受较低温度的青睐。F. solani 和 F. tricinctum 的最适宜温度为 30°C 和 25°C。对于根,F. solani 的最适温度也是 30°C,但 F. tricinctum 的根病在 15°C 时最高。在 4 周后受侵染的土壤中,与较低温度相比,F. solani 在 30°C 下根部的病斑长度更长,发病率更高,而对于 F.tricinctum,根病的最适温度为 15°C。这些病原体的热特异性特征暗示 F. solani 的疾病发展受较高温度的青睐,而在 F. tricinctum 中,它受较低温度的青睐。F. solani 和 F. tricinctum 的最适宜温度为 30°C 和 25°C。对于根,F. solani 的最适温度也是 30°C,但 F. tricinctum 的根病在 15°C 时最高。在 4 周后受侵染的土壤中,与较低温度相比,F. solani 在 30°C 下根部的病斑长度更长,发病率更高,而对于 F.tricinctum,根病的最适温度为 15°C。这些病原体的热特异性特征暗示 F. solani 的疾病发展受较高温度的青睐,而在 F. tricinctum 中,它受较低温度的青睐。在 4 周后受侵染的土壤中,与较低温度相比,F. solani 在 30°C 下根部的病斑长度更长,发病率更高,而对于 F.tricinctum,根病的最适温度为 15°C。这些病原体的热特异性特征暗示 F. solani 的疾病发展受较高温度的青睐,而在 F. tricinctum 中,它受较低温度的青睐。在 4 周后受侵染的土壤中,与较低温度相比,F. solani 在 30°C 下根部的病斑长度更长,发病率更高,而对于 F.tricinctum,根病的最适温度为 15°C。这些病原体的热特异性特征暗示 F. solani 的疾病发展受较高温度的青睐,而在 F. tricinctum 中,它受较低温度的青睐。
更新日期:2020-05-07
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