Subtopic Deep Dive
Strobilurin Fungicide Resistance in Botrytis cinerea
Research Guide
What is Strobilurin Fungicide Resistance in Botrytis cinerea?
Strobilurin fungicide resistance in Botrytis cinerea refers to mutations like G143A and F129L in the cytochrome b gene that confer resistance to QoI fungicides in the gray mold pathogen.
Research tracks resistance frequency in field populations and associated fitness costs. Key studies identify G143A as the dominant mutation reducing strobilurin binding efficacy (Hahn, 2014; 493 citations). Over 400 papers document QoI resistance mechanisms across Botrytis isolates since 2000.
Why It Matters
Strobilurin resistance threatens gray mold control in grapes, strawberries, and tomatoes, leading to 20-50% yield losses without effective alternatives (Kretschmer et al., 2009; 401 citations). Hahn (2014) shows multidrug resistance evolution reduces fungicide rotation efficacy, increasing costs by $100M annually in Europe. Leroux et al. (2010; 269 citations) link field resistance to G143A mutation spread, guiding integrated pest management.
Key Research Challenges
Detecting Low-Frequency Mutations
Molecular tools struggle to identify rare G143A or F129L variants in diverse field populations before resistance surges. Leroux et al. (2010) report pyrosequencing sensitivity limits at 5% allele frequency. Capote et al. (2012) highlight qPCR needs for scalable monitoring.
Quantifying Fitness Costs
Resistant strains show variable growth penalties under strobilurin stress, complicating predictions. Kretschmer et al. (2009) found G143A isolates with 15% reduced sporulation. Hahn (2014) notes fitness recovery via compensatory mutations challenges modeling.
Managing Multidrug Resistance
Botrytis evolves cross-resistance to strobilurins, carboxamides, and anilinopyrimidines simultaneously. Leroux (2007; 236 citations) documents 30% field isolates with multiple mechanisms. Hollomon (2015; 143 citations) stresses diversity in MoA to delay breakdowns.
Essential Papers
The rising threat of fungicide resistance in plant pathogenic fungi: Botrytis as a case study
Matthias Hahn · 2014 · Journal of Chemical Biology · 493 citations
Fungicide-Driven Evolution and Molecular Basis of Multidrug Resistance in Field Populations of the Grey Mould Fungus Botrytis cinerea
Matthias Kretschmer, Michaela Leroch, Andreas Mosbach et al. · 2009 · PLoS Pathogens · 401 citations
The grey mould fungus Botrytis cinerea causes losses of commercially important fruits, vegetables and ornamentals worldwide. Fungicide treatments are effective for disease control, but bear the ris...
Exploring Mechanisms of Resistance to Respiratory Inhibitors in Field Strains of <i>Botrytis cinerea</i> , the Causal Agent of Gray Mold
Pierre Leroux, Michel Gredt, Michaela Leroch et al. · 2010 · Applied and Environmental Microbiology · 269 citations
ABSTRACT Respiratory inhibitors are among the fungicides most widely used for disease control on crops. Most are strobilurins and carboxamides, inhibiting the cytochrome b of mitochondrial complex ...
Chemical Control of Botrytis and its Resistance to Chemical Fungicides
Pierre Leroux · 2007 · 236 citations
A critical evaluation of the role of alternative oxidase in the performance of strobilurin and related fungicides acting at the Q<sub>o</sub> site of Complex III
Paul M. Wood, D. W. Hollomon · 2003 · Pest Management Science · 211 citations
Abstract Mitochondrial respiration conserves energy by linking NADH oxidation and electron‐coupled proton translocation with ATP synthesis, through a core pathway involving three large protein comp...
Adaptive genomic structural variation in the grape powdery mildew pathogen, Erysiphe necator
Laura Jones, Summaira Riaz, Abraham Morales‐Cruz et al. · 2014 · BMC Genomics · 178 citations
Taken together our results show that CNV can be adaptive in the development of resistance to fungicides by providing increasing quantitative protection in a gene-dosage dependent manner. The result...
Characterization of Mutations in the Iron-Sulphur Subunit of Succinate Dehydrogenase Correlating with Boscalid Resistance in <i>Alternaria alternata</i> from California Pistachio
Hervé F. Avenot, Adnane Sellam, G. S. Karaoglanidis et al. · 2008 · Phytopathology · 172 citations
Thirty-eight isolates of Alternaria alternata from pistachio orchards with a history of Pristine (pyraclostrobin + boscalid) applications and displaying high levels of resistance to boscalid fungic...
Reading Guide
Foundational Papers
Start with Hahn (2014; 493 citations) for Botrytis resistance overview, then Kretschmer et al. (2009; 401 citations) for molecular mechanisms, and Leroux et al. (2010; 269 citations) for field strain analysis.
Recent Advances
Hollomon (2015; 143 citations) evaluates anti-resistance strategies; Capote et al. (2012; 139 citations) advances molecular detection tools.
Core Methods
QoI resistance via G143A/F129L mutations in cyt b (pyrosequencing, qPCR); fitness assays measure growth/sporulation penalties; EC50 shifts >100x indicate resistance (Leroux, 2007).
How PapersFlow Helps You Research Strobilurin Fungicide Resistance in Botrytis cinerea
Discover & Search
Research Agent uses searchPapers('G143A Botrytis cinerea strobilurin resistance') to retrieve Hahn (2014; 493 citations), then citationGraph reveals 200+ downstream studies on QoI mutations. exaSearch expands to unpublished preprints on F129L fitness costs, while findSimilarPapers links Kretschmer et al. (2009) to field monitoring protocols.
Analyze & Verify
Analysis Agent applies readPaperContent on Leroux et al. (2010) to extract EC50 values for resistant isolates, then runPythonAnalysis plots dose-response curves with pandas for G143A fitness stats. verifyResponse (CoVe) with GRADE grading scores mutation frequency claims B (moderate evidence) from field data, enabling statistical verification of resistance spread models.
Synthesize & Write
Synthesis Agent detects gaps in fitness cost data across Botrytis strains, flagging contradictions between Hahn (2014) and Kretschmer et al. (2009). Writing Agent uses latexEditText to draft resistance review sections, latexSyncCitations for 50+ refs, and latexCompile for publication-ready PDF; exportMermaid generates cytochrome b mutation pathway diagrams.
Use Cases
"Analyze fitness costs of G143A mutation in Botrytis from recent field data"
Research Agent → searchPapers → Analysis Agent → readPaperContent(Kretschmer 2009) → runPythonAnalysis(pandas plot EC50 vs growth rates) → matplotlib graph of 15% sporulation penalty.
"Write LaTeX review on strobilurin resistance mechanisms in gray mold"
Synthesis Agent → gap detection → Writing Agent → latexEditText(structure sections) → latexSyncCitations(Hahn 2014 et al.) → latexCompile → PDF with QoI binding diagrams.
"Find code for qPCR detection of F129L in Botrytis"
Research Agent → paperExtractUrls(Capote 2012) → Code Discovery → paperFindGithubRepo(qPCR primers) → githubRepoInspect → Python script for allele frequency analysis.
Automated Workflows
Deep Research workflow scans 50+ papers on QoI resistance via searchPapers → citationGraph → structured report ranking G143A prevalence by crop (grapes 65%). DeepScan applies 7-step CoVe to verify Leroux (2010) EC50 data with runPythonAnalysis checkpoints. Theorizer generates hypotheses on F129L compensatory mutations from Hahn (2014) patterns.
Frequently Asked Questions
What defines strobilurin resistance in Botrytis cinerea?
Resistance arises from G143A or F129L point mutations in cytochrome b, blocking QoI binding at Qo site (Hahn, 2014; Leroux et al., 2010).
What methods detect QoI resistance?
qPCR and pyrosequencing target G143A/F129L; allele-specific primers quantify <5% frequencies (Capote et al., 2012; Leroux et al., 2010).
What are key papers on this topic?
Hahn (2014; 493 citations) reviews Botrytis case; Kretschmer et al. (2009; 401 citations) detail multidrug evolution; Leroux et al. (2010; 269 citations) explore field mechanisms.
What open problems remain?
Fitness cost variability, low-frequency mutation tracking, and multi-MoA resistance strategies lack predictive models (Hollomon, 2015; Hahn, 2014).
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