Detoxifying bacterial genes for deoxynivalenol epimerization confer durable resistance to Fusarium head blight in wheat

© 2024 The Authors. Plant Biotechnology Journal published by Society for Experimental Biology and The Association of Applied Biologists and John Wiley & Sons Ltd..

Fusarium head blight (FHB) and the presence of mycotoxin deoxynivalenol (DON) pose serious threats to wheat production and food safety worldwide. DON, as a virulence factor, is crucial for the spread of FHB pathogens on plants. However, germplasm resources that are naturally resistant to DON and DON-producing FHB pathogens are inadequate in plants. Here, detoxifying bacteria genes responsible for DON epimerization were used to enhance the resistance of wheat to mycotoxin DON and FHB pathogens. We characterized the complete pathway and molecular basis leading to the thorough detoxification of DON via epimerization through two sequential reactions in the detoxifying bacterium Devosia sp. D6-9. Epimerization efficiently eliminates the phytotoxicity of DON and neutralizes the effects of DON as a virulence factor. Notably, co-expressing of the genes encoding quinoprotein dehydrogenase (QDDH) for DON oxidation in the first reaction step, and aldo-keto reductase AKR13B2 for 3-keto-DON reduction in the second reaction step significantly reduced the accumulation of DON as virulence factor in wheat after the infection of pathogenic Fusarium, and accordingly conferred increased disease resistance to FHB by restricting the spread of pathogenic Fusarium in the transgenic plants. Stable and improved resistance was observed in greenhouse and field conditions over multiple generations. This successful approach presents a promising avenue for enhancing FHB resistance in crops and reducing mycotoxin contents in grains through detoxification of the virulence factor DON by exogenous resistance genes from microbes.

Medienart:

E-Artikel

Erscheinungsjahr:

2024

Erschienen:

2024

Enthalten in:

Zur Gesamtaufnahme - year:2024

Enthalten in:

Plant biotechnology journal - (2024) vom: 09. Apr.

Sprache:

Englisch

Beteiligte Personen:

He, Wei-Jie [VerfasserIn]
Yang, Peng [VerfasserIn]
Huang, Tao [VerfasserIn]
Liu, Yu-Fan [VerfasserIn]
Zhang, Yu-Wei [VerfasserIn]
Zhang, Wen-Min [VerfasserIn]
Zhang, Tian-Tian [VerfasserIn]
Zheng, Meng-Ru [VerfasserIn]
Ma, Ling [VerfasserIn]
Zhao, Chang-Xing [VerfasserIn]
Li, He-Ping [VerfasserIn]
Liao, Yu-Cai [VerfasserIn]
Wu, Ai-Bo [VerfasserIn]
Zhang, Jing-Bo [VerfasserIn]

Links:

Volltext

Themen:

Crop protection
Epimerization detoxification
Fusarium head blight
Journal Article
Mycotoxin deoxynivalenol
Resistance genes

Anmerkungen:

Date Revised 09.04.2024

published: Print-Electronic

Citation Status Publisher

doi:

10.1111/pbi.14353

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM370827155