Species composition, gibberellin production and sensitivity to ipconazole of the &lt;i&gt;Fusarium fujikuroi&lt;/i&gt; species complex isolates obtained before and after its launch

Tateishi, Hideaki; Suga, Haruhisa

doi:10.1584/jpestics.d14-083

Cited by 6 publications

(5 citation statements)

References 12 publications

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“…In our previous study, seed treatment with ipconazole at the commercial dosage showed high efficacy against all pathogenic (GA producer) F. fujikuroi isolates. 9,10) In GA producers with higher sensitivity (MIC less than 1.25 mg/L in PD liquid medium and less than 1.56 on PDA), the expression level of CYP51 did not tend to increase MIC dependently, and no substitution in the amino acid sequence of CYP51 protein in F. fujikuroi isolates may support the stable high efficacy of ipconazole against rice Bakanae disease.…”

Section: Discussionmentioning

confidence: 99%

“…GA productivity was detected in the F. fujikuroi isolates with higher sensitivity to ipconazole but not in the isolates with lower sensitivity and F. proliferatum. 10) CYP51 belongs to the family of cytochrome P-450, which catalyzes 14α-demethylation of 24-methylene-dihydro-lanosterol in fungal ergosterol biosynthesis pathway, and it is the target enzyme of DMI fungicides. Many papers describe the sensitivity mechanisms of plant pathogenic fungi to DMI fungicides including the mutation of CYP51, but only a few are concerned with Fusaria.…”

Section: Introductionmentioning

confidence: 99%

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Polymorphism and expression level of CYP51 (cytochrome P450) and sensitivity to ipconazole in Fusarium fujikuroi isolates

Tateishi

Miyake

Suga

2019

Journal of Pesticide Science

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The relationship between the nucleotide sequences of CYP51, its expression level and its sensitivity to ipconazole of Fusarium fujikuroi isolates were investigated. Single nucleotide polymorphisms (SNPs) were observed in the CYP51 of isolates with different sensitivities to ipconazole, but no amino acid substitution was detected in the putative amino acid sequence of the CYP51 protein. On the other hand, the expression of CYP51 was enhanced by the presence of ipconazole, and it tended to be higher in isolates with lower sensitivities and no gibberellin productivity. In the presumed promoter region, the upstream nucleotide sequence of CYP51, several common SNPs and insertions of nucleotides were detected in the lower sensitivity isolates. These results suggest that F. fujikuroi isolates consist of 2 different groups in sensitivity and gibberellin productivity, and no amino acid substitution in CYP51 protein may contribute to the stably high efficacy of ipconazole against rice Bakanae disease for more than 25 years.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Polymorphism and expression level of CYP51 (cytochrome P450) and sensitivity to ipconazole in Fusarium fujikuroi isolates

Tateishi

Miyake

Suga

2019

Journal of Pesticide Science

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“…The antifungal efficacy of triazole has been assessed to control F. moniliforme by using 25% tebuconazole emulsifiable concentrate (EC), 25% propiconazole EC, and 2.5% difenoconazole EC (Hossain K. S. et al, 2015 ). Application of triazole fungicides such as propiconazole (Bagga and Sharma, 2006 ) and ipconazole (Tateishi and Suga, 2015 ; Li et al, 2018 ) and imidazole fungicide such as prochloraz (Kumar et al, 2020 ) significantly suppressed F. fujikuroi growth. Soaking of rice seeds for 24 h in a diluted solution of 200-folds of ipconazole wettable powder at 6% or ipconazole at 0.0472 μg/mL showed efficacy against bakanae disease.…”

Section: Control Methodsmentioning

confidence: 99%

An explanation of the mystifying bakanae disease narrative for tomorrow's rice

et al. 2023

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Rice production is severely hampered by the bakanae disease (Fusarium fujikuroi), formerly recognized as Fusarium moniliforme. F. moniliforme was called the F. fujikuroi species complex (FFSC) because it was later discovered that it had some separate species. The FFSC's constituents are also well recognized for producing phytohormones, which include auxins, cytokinin, and gibberellins (GAs). The normal symptoms of bakanae disease in rice are exacerbated by GAs. The members of the FFSC are responsible for the production of fumonisin (FUM), fusarins, fusaric acid, moniliformin, and beauvericin. These are harmful to both human and animal health. This disease is common around the world and causes significant yield losses. Numerous secondary metabolites, including the plant hormone gibberellin, which causes classic bakanae symptoms, are produced by F. fujikuroi. The strategies for managing bakanae, including the utilization of host resistance, chemical compounds, biocontrol agents, natural goods, and physical approaches, have been reviewed in this study. Bakanae disease is still not entirely preventable, despite the adoption of many different tactics that have been used to manage it. The benefits and drawbacks of these diverse approaches are discussed by the authors. The mechanisms of action of the main fungicides as well as the strategies for resistance to them are outlined. The information compiled in this study will contribute to a better understanding of the bakanae disease and the development of a more effective management plan for it.

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“…Thus, F. fujikuroi , the only Fusarium species capable of GA3 synthesis, by regulation and expression of jasmonic acid-responsive gene and jasmonic acid-mediated plant immune responses [ 55 , 56 ]. Furthermore, production of GA was also linked with the fungicide sensitivity of different F. fujikuroi isolates [ 57 , 58 ].…”

Section: Symptoms and Secondary Metabolitesmentioning

confidence: 99%

Current Studies on Bakanae Disease in Rice: Host Range, Molecular Identification, and Disease Management

An,

Murugesan,

Choi

et al. 2023

Mycobiology

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The seed borne disease such as bakanae is difficult to control. Crop yield loss caused by bakanae depending on the regions and varieties grown, ranging from 3.0% to 95.4%. Bakanae is an important disease of rice worldwide and the pathogen was identified as Fusarium fujikuroi Nirenberg (teleomorph: Gibberella fujikuroi Sawada). Currently, four Fusaria ( F. fujikuroi, F. proliferatum, F. verticillioides and F. andiyazi ) belonging to F. fujikuroi species complex are generally known as the pathogens of bakanae. The infection occurs through both seed and soil-borne transmission. When infection occurs during the heading stage, rice seeds become contaminated. Molecular detection of pathogens of bakanae is important because identification based on morphological and biological characters could lead to incorrect species designation and time-consuming. Seed disinfection has been studied for a long time in Korea for the management of the bakanae disease of rice. As seed disinfectants have been studied to control bakanae, resistance studies to chemicals have been also conducted. Presently biological control and resistant varieties are not widely used. The detection of this pathogen is critical for seed certification and for preventing field infections. In South Korea, bakanae is designated as a regulated pathogen. To provide highly qualified rice seeds to farms, Korea Seed & Variety Service (KSVS) has been producing and distributing certified rice seeds for producing healthy rice in fields. Therefore, the objective of the study is to summarize the recent progress in molecular identification, fungicide resistance, and the management strategy of bakanae.

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Species composition, gibberellin production and sensitivity to ipconazole of the <i>Fusarium fujikuroi</i> species complex isolates obtained before and after its launch

Cited by 6 publications

References 12 publications

Polymorphism and expression level of <i>CYP51</i> (cytochrome P450) and sensitivity to ipconazole in <i>Fusarium fujikuroi</i> isolates

Polymorphism and expression level of <i>CYP51</i> (cytochrome P450) and sensitivity to ipconazole in <i>Fusarium fujikuroi</i> isolates

An explanation of the mystifying bakanae disease narrative for tomorrow's rice

Current Studies on Bakanae Disease in Rice: Host Range, Molecular Identification, and Disease Management

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