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The Major Fusarium Species Causing Maize Ear and Kernel Rot and Their Toxigenicity in Chongqing, China

Danni Zhou1,2, Xiaoming Wang3, Guokang Chen4

  • 1Institute of Crop Sciences, Chinese Academy of Agricultural Sciences/National Key Facility for Crop Gene Resources and Genetic Improvement, Beijing 100081, China. zhoudn2014@163.com.

Toxins
|February 23, 2018
PubMed

Insights

This study identifies Fusarium verticillioides, F. proliferatum, and F. meridionale as key maize pathogens in China, producing fumonisins and other mycotoxins. F. proliferatum strains showed significantly higher fumonisin production in vitro.

Area of Science:

  • Plant Pathology
  • Mycology
  • Food Safety

Background:

  • Maize ear and kernel rot, caused by Fusarium species, is a significant agricultural disease.
  • Understanding the predominant Fusarium species and their toxigenic profiles is crucial for disease management and food safety.

Purpose of the Study:

  • To identify the main Fusarium species causing maize rot in Chongqing, China.
  • To assess the toxigenic potential and genotypes of these Fusarium isolates.
  • To provide insights for resistance breeding strategies.

Main Methods:

  • Isolation and identification of Fusarium species from infected maize.
  • Molecular amplification to detect the toxigenic gene FUM1.
  • Toxin assays to quantify fumonisin B1, nivalenol (NIV), zearalenone (ZEA), and deoxynivalenol (DON).

Main Results:

  • Fusarium verticillioides, F. proliferatum, and F. meridionale were the predominant species.
  • F. proliferatum isolates produced significantly higher levels of fumonisin B1 compared to F. verticillioides.
  • F. meridionale isolates produced NIV, ZEA, and DON, while F. asiaticum produced minimal mycotoxins.

Conclusions:

  • Fusarium proliferatum and F. verticillioides pose a significant risk due to fumonisin production.
  • Fusarium meridionale contributes to maize contamination with NIV, ZEA, and DON.
  • Findings guide targeted resistance breeding for Fusarium ear and kernel rot in the region.
Keywords:
Fusarium speciesear and kernel rotmaizemycotoxin productiontoxigenic genotype

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