Analysis of the Antagonistic Effect of Dibutyl Phthalate on Magnaporthe oryzae through Bioassay and Omics Data
文献类型： 外文期刊
作者： Qin, Yingfei 1 ; Wu, Xiyang 1 ; Tan, Xinqiu 1 ; Liu, Yong 1 ; Zhang, Deyong 1 ; Chen, Yue 1 ;
作者机构： 1.Hunan Univ, Coll Biol, Longping Branch, Changsha 410125, Peoples R China
2.Hunan Acad Agr Sci, State Key Lab Hybrid Rice, State Key Lab Hybrid Rice, Changsha 410125, Peoples R China
3.Hunan Acad Agr Sci, Inst Plant Protect, Changsha 410125, Peoples R China
4.Yuelushan Lab, Changsha 410000, Peoples R China
关键词： dibutyl phthalate; antifungal activity; Magnaportheoryzae; transcriptome; metabolome
期刊名称：JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY （ 影响因子：6.2； 五年影响因子：6.4 ）
ISSN： 0021-8561
年卷期： 2025 年 73 卷 30 期
页码：
收录情况： SCI
摘要： The fungus Magnaporthe oryzae (M. oryzae) triggers rice blast, significantly endangering the agricultural production. We identified a potential antifungal metabolite, Dibutyl Phthalate (DBP), from the fermentation broth of Stenotrophomonas genitulata WXY53 through mass spectrometry analysis. DBP inhibited the growth of M. oryzae hyphae by 44.52%, inhibited the formation of appressorium with an inhibition rate of 85.07% at 8 h and 68.97% at 24 h, and directly delaying the colonization of invasive hyphae on plants. Treatment with DBP substantially decreased the lesion count by 57.61% and 43.77% in rice and barley, respectively. The metabolomics and transcriptome sequencing analyses showed that DBP affects lipid metabolism, the MAPK signaling pathway, carbohydrate metabolism, and other metabolic processes of M. oryzae. Significant differences were found in the levels of reactive oxygen species, enzymatic activity, lipid metabolism, conductivity, extracellular protein content and membrane fluidity after DBP treatment. Scanning electron microscopy revealed that the hyphae and conidia fractured, wrinkled, and deformed. DBP does not significantly affect plant seedlings growth and has an LC50 of 11.93 mg/L for Danio rerio. And DBP may have broad-spectrum antifungal activity. In this study, we provided a reference for the ability of DBP to inhibit M. oryzae and revealed its antifungal mechanism.
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