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Morphological Changes of Fungal Cell Wall and ABC Transporter as Resistance Responses of Rice Bakanae Disease Pathogen Fusarium fujikuroi CF337 to Prochloraz
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 Title & Authors
Morphological Changes of Fungal Cell Wall and ABC Transporter as Resistance Responses of Rice Bakanae Disease Pathogen Fusarium fujikuroi CF337 to Prochloraz
Yang, You-Ri; Lee, Si-Woo; Lee, Se-Won; Kim, In-Seon;
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 Abstract
BACKGROUND: The resistance of rice bakanae disease pathogens against the fungicide prochloraz has been reported. Understanding the resistance mechanisms is an important for better control of the pathogens. In the present study, we investigated the resistance mechanisms of Fusarium fujikuroi CF337 (CF337) against prochloraz. METHODS AND RESULTS: Morphological changes in the cell wall of CF337 grown in potato dextrose broth (PDB) with or without prochloraz was investigated by transmission electron microscopy. Growth inhibition of CF337 was examined in PDB containing prochloraz or an ABC transporter inhibitor or both of them. Cell wall thickness of CF337 grown in PDB with prochloraz was significantly increased from to . Significant inhibition in the growth of CF337 was observed in the presence of both prochloraz and the inhibitor, but no growth inhibition was observed in the presence of the inhibitor or prochloraz. Sequence analysis of ATP-binding cassette transporter (ABC) gene of CF337 showed 70 to 80% similarities to the genes of the pathogens resistant to other fungicides. CONCLUSION: Efflux transporter system and changes in cell wall thickness were suggested as resistance mechanisms of CF337 against prochloraz.
 Keywords
Conazoles;Demethylation inhibitor;Fungicide resistance;Prochloraz;Rice bakanae disease;
 Language
Korean
 Cited by
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