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<p>An increasing number of studies have shown that root exudates play an important role in plant disease resistance. The high incidence of soft rot diseases is a major constraint of konjac production. The aim of this study was to investigate the activity and composition of the root exudates from resistant cultivars (<i>Amorphophallus bulbifer,</i> HB) and susceptible cultivars (<i>Amorphophallus konjac K.Koch,</i> HK) via high-performance liquid chromatography-tandem mass spectrometry (UHPLC-q Exactive HF-X). We identified 26 significant differentially accumulated metabolites. Further analysis of the differential metabolites showed that there were 7 unique metabolites in HB and 4 unique metabolites in HK. The fold change was 0.614 and 0.561 in HK/HB for 3-fucosyllactose and buddleoflavonoloside, respectively. Analysis of metabolic pathways using the Kyoto Encyclopedia of Genes and Genomes database revealed that the concentration of jasmonic acid was significantly higher in HB than in HK. Jasmonic acid metabolism was involved in the regulation of konjac soft rot disease resistance. Our results indicate that the root exudates could be used as a pre-infection prevention strategy as well as help control disease outbreaks.</p>

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The composition of root exudates between resistant and susceptible konjac species against soft rot disease

  • 期刊论文

  • 发表日期：

    2025年3月17日

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  • Jinping Wu,
  • Jie Zhou,
  • Chaozhu Yang,
  • Yidi Kuang,
  • Chuangdong Qi,
  • Fengling Guo,
  • Qinghua Zhao

摘要

An increasing number of studies have shown that root exudates play an important role in plant disease resistance. The high incidence of soft rot diseases is a major constraint of konjac production. The aim of this study was to investigate the activity and composition of the root exudates from resistant cultivars (Amorphophallus bulbifer, HB) and susceptible cultivars (Amorphophallus konjac K.Koch, HK) via high-performance liquid chromatography-tandem mass spectrometry (UHPLC-q Exactive HF-X). We identified 26 significant differentially accumulated metabolites. Further analysis of the differential metabolites showed that there were 7 unique metabolites in HB and 4 unique metabolites in HK. The fold change was 0.614 and 0.561 in HK/HB for 3-fucosyllactose and buddleoflavonoloside, respectively. Analysis of metabolic pathways using the Kyoto Encyclopedia of Genes and Genomes database revealed that the concentration of jasmonic acid was significantly higher in HB than in HK. Jasmonic acid metabolism was involved in the regulation of konjac soft rot disease resistance. Our results indicate that the root exudates could be used as a pre-infection prevention strategy as well as help control disease outbreaks.