Antifungal activity of water-soluble products obtained following the liquefaction of cornstalk with sub-critical water,Pesticide Biochemistry and Physiology

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Antifungal activity of water-soluble products obtained following the liquefaction of cornstalk with sub-critical water
Pesticide Biochemistry and Physiology ( IF 4.2 ) Pub Date : 2020-02-01 , DOI: 10.1016/j.pestbp.2019.11.023
Shengnan Zhao ₁ , Zhiyong Li ₁ , Zhengxin Zhou ₁ , Lifeng Xu ₁ , Shihao He ₁ , Yueming Dou ₁ , Xuejun Cui ₁ , Shiji Kang ₂ , Yan Gao ₁ , Yan Wang ₃

Affiliation

Cornstalks are the leftover leaves and stems in a field after corn harvest. They are a potential biomass resource but are underutilized in agricultural production systems. To examine the chemical components in cornstalks and their corresponding functions, blocky cornstalks were treated in water at temperatures of 190, 210, 230, 250, and 270 °C in a high-pressure reactor. Water-soluble products (WSPs) were extracted from these treatments, and their chemical compositions were analyzed using gas chromatography-mass spectrometry (GC-MS), and their antifungal activities were determined using a bioassay. It was found that WSPs contained 28.7-40.1% phenols, 27.9-36.6% ketones, 0-2.6% alcohols, 4.9-10.1% esters, 5.4-7.8% organic acids, 1.3-12% aldehydes, and 5.5-18.4% of other organic compounds such as nitrogen- and sulfur-containing compounds, furan compounds, and benzene compounds. The inhibition the growth of the plant pathogen Fusarium oxysporum by WSPs was affected by temperature. WSP-270 (obtained at 270 °C) exhibited the best growth-inhibition efficacy. Under a biomicroscope, WSP-270-treated F. oxysporum showed a deformed and swollen hypha, and an increased number of bifurcations, as well as an expansion of growing apexes of new bifurcations. Therefore, the antifungal activity of WSPs could be used to manage soilborne plant pathogens.

中文翻译：

用亚临界水液化玉米秸秆后获得的水溶性产物的抗真菌活性

玉米秸秆是玉米收获后田间剩下的叶子和茎。它们是一种潜在的生物质资源，但在农业生产系统中未得到充分利用。为了检查玉米杆中的化学成分及其相应的功能，在高压反应器中以 190、210、230、250 和 270 °C 的温度对块状玉米杆进行了处理。从这些处理中提取水溶性产物 (WSP)，使用气相色谱-质谱法 (GC-MS) 分析其化学成分，并使用生物测定法测定其抗真菌活性。结果表明，WSPs 含有 28.7-40.1% 的苯酚、27.9-36.6% 的酮、0-2.6% 的醇、4.9-10.1% 的酯、5.4-7.8% 的有机酸、1.3-12% 的醛和 5.5-18.4% 的其他有机化合物，如含氮和硫化合物，呋喃类化合物和苯类化合物。WSPs对植物病原菌尖孢镰刀菌(Fusarium oxysporum)的抑制作用受温度影响。WSP-270（在 270 °C 下获得）表现出最佳的生长抑制功效。在生物显微镜下，WSP-270 处理的尖孢镰刀菌显示出变形和肿胀的菌丝，分叉数量增加，以及新分叉的生长顶点扩大。因此，WSP 的抗真菌活性可用于管理土壤传播的植物病原体。以及不断扩大的新分叉顶点。因此，WSP 的抗真菌活性可用于管理土壤传播的植物病原体。以及不断扩大的新分叉顶点。因此，WSP 的抗真菌活性可用于管理土壤传播的植物病原体。

更新日期：2020-02-01

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