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Acta Horticulturae Sinica ›› 2025, Vol. 52 ›› Issue (9): 2519-2531.doi: 10.16420/j.issn.0513-353x.2024-0590

• Plant Protection • Previous Articles     Next Articles

Response of Banana Root Exudates to Fusarium oxysporum f. sp. cubense Infection

ZHANG Shengnan1,2, PANG Yuwan1, HUANG Jianfeng1,*(), WU Meihua1,2, WU Zhaoyun1, ZHANG Mu1, LI Ping1, FU Hongting1, WU Yongpei1   

  1. 1 Institute of Agricultural Resources and EnvironmentGuangdong Academy of Agricultural Sciences,Key Laboratory of Plant Nutrition and Fertilizer in South Region,Ministry of Agriculture,Guangdong Key Laboratory of Nutrient Cycling and Farmland Conservation, Guangzhou 510640, China
    2 Mudanjiang Normal UniversityMudanjiang, Heilongjiang 157011, China
  • Received:2025-05-13 Revised:2025-06-23 Online:2025-09-25 Published:2025-09-24
  • Contact: HUANG Jianfeng

Abstract:

Fusarium wilt of banana is induced by Fusarium oxysporum f. sp. cubense,the tropical race 4(Foc4)is the most pathogenic type. The composition and content of root exudates from healthy and diseased bananas(wilted level 3)were detected by liquid chromatography-mass spectrometry. The results showed that the contents of six sugar substances,such as galactose,in diseased bananas root exudates were significantly higher than those in healthy bananas,thirteen organic acids,such as shikimic acid,and twelve phenolic acids,such as salicylic acid,were also significantly higher in their root exudates compared to both the initial seedlings and healthy bananas. Meanwhile,the contents of three amino acids,such as L-tyrosine,were reduced compared to both the initial and healthy banana root exudates. The 39 differential components mentioned above were used for subsequent research,and it was found that Foc4 had a higher chemotaxis radius towards phenolic acids and organic acids than amino acids and sugars,and its average reproductive quantity in phenolic acids and average mycelial growth diameter in organic acids and phenolic acids were higher than the positive control. Correlation analysis showed that the growth rate of banana root exudates was positively correlated with Foc4 chemotaxis radius,reproduction quantity,and hyphal growth diameter(P < 0.05),indicating that Foc4 infection increased the content of substances in banana root exudates that were beneficial for the growth of pathogens,providing the necessary nutrients for their colonization in the banana rhizosphere.

Key words: banana, root exudates, Fusarium oxysporum f. sp. cubense, infection.