Copper Ions are Required for Cochliobolus heterostrophus in Appressorium Formation and Virulence on Maize

is the causal agent of southern corn leaf blight, a destructive disease on maize worldwide. However, how it regulates virulence on maize is still largely unknown. Here, we report that two copper transporter genes, and , are required for its virulence. and mutants showed attenuated virulence on maize...

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Published inPhytopathology Vol. 110; no. 2; pp. 494 - 504
Main Authors Zhang, Yu, Zhang, Yan, Yu, Dandan, Peng, Yujiao, Min, Haoxuan, Lai, Zhibing
Format Journal Article
LanguageEnglish
Published United States 01.02.2020
Subjects
Ascomycota - pathogenicity
Ascomycota - physiology
Copper - chemistry
Ions - chemistry
Plant Diseases - microbiology
Virulence
Zea mays - microbiology
mycology
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Summary:is the causal agent of southern corn leaf blight, a destructive disease on maize worldwide. However, how it regulates virulence on maize is still largely unknown. Here, we report that two copper transporter genes, and , are required for its virulence. and mutants showed attenuated virulence on maize compared with the wild-type strain TM17 but development phenotypes of those mutants on media with or without infection-related stress agents were the same as the wild-type strain. Moreover, and play critical roles in appressorium formation and mutation of or suppresses the appressorium formation. Furthermore, copper-chelating agent ammonium tetrathiomolybdate suppressed the appressorium formation and virulence of on maize, whereas copper ions enhanced the appressorium formation and virulence on maize. The results indicate that copper ions are required for appressorium formation and virulence of on maize and are acquired from the environment by two copper transporters: ChCTR1 and ChCTR4.
ISSN:0031-949X
1943-7684
DOI:10.1094/PHYTO-07-19-0254-R