The G143A Mutation in the Cytochrome b Gene Is Associated with Quinone Outside Inhibitor Fungicide Resistance in Cercospora sojina from Soybean Fields in Wisconsin

Danilo L. Neves, Richard W. Webster, Damon L. Smith, Carl A. Bradley

Research output: Contribution to journalArticlepeer-review

Abstract

Fungicides are valuable tools for crop protection, and correct use reduces the risks associated with fungal plant diseases, especially those related to yield losses. On the other hand, excessive fungicide use can give rise to the selection of fungicide-resistant pathogens (Brent and Hollomon 2007). Quinone outside inhibitor (QoI) fungicides have been widely used to manage plant diseases, because they have a broad spectrum against many fungal plant pathogens. Fungicides in the QoI class inhibit mitochondrial respiration by binding to the quinol oxidation site of the cytochrome bc1 complex, interrupting electron transport (Bartlett et al. 2002). Because QoI fungicides have a single mode of action, the risk of selection of fungal isolates with resistance is considered high (FRAC 2020).

Original languageEnglish
Pages (from-to)241-242
Number of pages2
JournalPlant Health Progress
Volume23
Issue number2
DOIs
StatePublished - 2022

Bibliographical note

Funding Information:
Funding: Support for this research was supported by the United Soybean Board (grant number 2120-172-0140) and the Wisconsin Soybean Marketing Board.

Publisher Copyright:
© 2022. The American Phytopathological Society

Keywords

  • Cyt b
  • Frogeye leaf spot
  • Glycine max
  • Qoi

ASJC Scopus subject areas

  • Plant Science
  • Horticulture

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