Subtopic Deep Dive
Sclerotinia sclerotiorum Pathogenicity Mechanisms
Research Guide
What is Sclerotinia sclerotiorum Pathogenicity Mechanisms?
Sclerotinia sclerotiorum pathogenicity mechanisms encompass the molecular strategies employed by this necrotrophic fungus, including oxalic acid secretion, cell wall degrading enzymes, and effector proteins, to infect over 400 plant hosts.
S. sclerotiorum causes white mold disease across dicots via oxalic acid-mediated host defense suppression and tissue maceration (Bolton et al., 2005; 1118 citations). Genomic studies reveal conserved virulence genes shared with Botrytis cinerea (Amselem et al., 2011; 1053 citations). Over 10 key papers since 1979 document host range and infection processes, with oxalic acid confirmed as a core factor (Cessna et al., 2000; 552 citations).
Why It Matters
S. sclerotiorum infects crops like soybean, canola, and sunflower, causing billions in annual losses; targeting oxalic acid production offers fungicide development opportunities (Bolton et al., 2005). Williams et al. (2011; 458 citations) showed oxalic acid manipulates host redox balance to promote necrotrophy, informing resistance breeding. Godoy et al. (1990; 460 citations) used mutants to prove oxalic acid's role in bean infection, enabling gene-editing strategies for durable resistance. Purdy (1979; 663 citations) mapped geographic impact, guiding precision agriculture.
Key Research Challenges
Oxalic Acid Regulation
Pathway controlling oxalic acid biosynthesis and secretion remains incompletely mapped despite mutant studies (Godoy et al., 1990). Environmental cues triggering production during infection need clarification (Cessna et al., 2000). Kim et al. (2008; 380 citations) linked it to programmed cell death, but feedback loops are unresolved.
Effector Protein Functions
Genomes predict hundreds of effectors, but few are functionally validated in host interaction (Amselem et al., 2011). Bolton et al. (2005) noted secretion systems, yet host targets are unknown. Williams et al. (2011) implicated redox modulation without effector specificity.
Host Range Mechanisms
Boland and Hall (1994; 1166 citations) listed 400+ hosts, but universal virulence factors versus host-specific adaptations are debated. Purdy (1979) described symptomatology variations unexplained molecularly. Genomic comparisons highlight persistence traits needing functional dissection (Amselem et al., 2011).
Essential Papers
Index of plant hosts of Sclerotinia sclerotiorum
G. J. Boland, Robert Hall · 1994 · Canadian Journal of Plant Pathology · 1.2K citations
(1994). Index of plant hosts of Sclerotinia sclerotiorum. Canadian Journal of Plant Pathology: Vol. 16, No. 2, pp. 93-108.
<i>Sclerotinia sclerotiorum</i> (Lib.) de Bary: biology and molecular traits of a cosmopolitan pathogen
Melvin D. Bolton, Bart P. H. J. Thomma, Berlin D. Nelson · 2005 · Molecular Plant Pathology · 1.1K citations
SUMMARY Sclerotinia sclerotiorum (Lib.) de Bary is a necrotrophic fungal pathogen causing disease in a wide range of plants. This review summarizes current knowledge of mechanisms employed by the f...
Genomic Analysis of the Necrotrophic Fungal Pathogens Sclerotinia sclerotiorum and Botrytis cinerea
Joëlle Amselem, Christina A. Cuomo, J.A.L. van Kan et al. · 2011 · PLoS Genetics · 1.1K citations
Sclerotinia sclerotiorum and Botrytis cinerea are closely related necrotrophic plant pathogenic fungi notable for their wide host ranges and environmental persistence. These attributes have made th...
<i>Sclerotinia sclerotiorum</i>: History, Diseases and Symptomatology, Host Range, Geographic Distribution, and Impact
Laurence H. Purdy · 1979 · Phytopathology · 663 citations
Oxalic Acid, a Pathogenicity Factor for <i>Sclerotinia sclerotiorum</i>, Suppresses the Oxidative Burst of the Host Plant
Stephen G. Cessna, Valerie E. Sears, Martin B. Dickman et al. · 2000 · The Plant Cell · 552 citations
Effective pathogenesis by the fungus Sclerotinia sclerotiorum requires the secretion of oxalic acid. Studies were conducted to determine whether oxalate aids pathogen compatibility by modulating th...
Identification and use of potential bacterial organic antifungal volatiles in biocontrol
W. G. Dilantha Fernando, Rajesh Ramarathnam, Akkanas S. Krishnamoorthy et al. · 2004 · Soil Biology and Biochemistry · 526 citations
Use of mutants to demonstrate the role of oxalic acid in pathogenicity of Sclerotinia sclerotiorum on Phaseolus vulgaris
Gerardo Godoy, J.R. Steadman, Martin B. Dickman et al. · 1990 · Physiological and Molecular Plant Pathology · 460 citations
Reading Guide
Foundational Papers
Start with Bolton et al. (2005; 1118 citations) for biology overview, then Cessna et al. (2000; 552 citations) for oxalic acid mechanism, followed by Godoy et al. (1990; 460 citations) for mutant evidence establishing pathogenicity factors.
Recent Advances
Study Williams et al. (2011; 458 citations) for redox manipulation and Kim et al. (2008; 380 citations) for cell death elicitation as advances building on genomics (Amselem et al., 2011).
Core Methods
Key techniques: oxalic acid mutants (Godoy et al., 1990), genome sequencing (Amselem et al., 2011), oxidative burst assays (Cessna et al., 2000), and redox profiling (Williams et al., 2011).
How PapersFlow Helps You Research Sclerotinia sclerotiorum Pathogenicity Mechanisms
Discover & Search
Research Agent uses searchPapers('Sclerotinia sclerotiorum oxalic acid pathogenicity') to retrieve Bolton et al. (2005), then citationGraph reveals 1118 citing papers on virulence. exaSearch scans for unpublished preprints, while findSimilarPapers expands to related necrotrophs like Amselem et al. (2011).
Analyze & Verify
Analysis Agent applies readPaperContent on Cessna et al. (2000) to extract oxidative burst suppression data, then verifyResponse with CoVe cross-checks claims against Williams et al. (2011). runPythonAnalysis parses gene expression datasets for oxalic acid correlations, with GRADE scoring evidence strength on mutant phenotypes (Godoy et al., 1990).
Synthesize & Write
Synthesis Agent detects gaps in effector validation post-Amselem et al. (2011) genome, flags contradictions in host range claims (Boland and Hall, 1994 vs. Purdy, 1979). Writing Agent uses latexEditText for manuscript sections, latexSyncCitations integrates 10+ references, latexCompile generates PDF, and exportMermaid diagrams oxalic acid pathways.
Use Cases
"Analyze oxalic acid gene expression data from S. sclerotiorum infection time series"
Research Agent → searchPapers → Analysis Agent → runPythonAnalysis (pandas/matplotlib on RNA-seq data) → researcher gets plotted expression heatmaps and statistical correlations (e.g., upregulation during host colonization).
"Write LaTeX review on S. sclerotiorum effectors with citations"
Synthesis Agent → gap detection → Writing Agent → latexEditText → latexSyncCitations (Amselem et al., 2011; Bolton et al., 2005) → latexCompile → researcher gets compiled PDF review with formatted equations and figures.
"Find code for analyzing S. sclerotiorum genomic effectors"
Research Agent → paperExtractUrls (Amselem et al., 2011) → Code Discovery → paperFindGithubRepo → githubRepoInspect → researcher gets inspected Python scripts for effector prediction and annotation.
Automated Workflows
Deep Research workflow scans 50+ papers via searchPapers on 'Sclerotinia sclerotiorum pathogenicity', structures report with oxalic acid sections from Cessna et al. (2000) and Williams et al. (2011). DeepScan applies 7-step CoVe to verify mutant data (Godoy et al., 1990), with GRADE checkpoints. Theorizer generates hypotheses on effector-host interactions from Bolton et al. (2005) biology summary.
Frequently Asked Questions
What defines Sclerotinia sclerotiorum pathogenicity mechanisms?
Core mechanisms include oxalic acid secretion suppressing host oxidative burst (Cessna et al., 2000), cell wall degradation, and effector deployment during necrotrophic growth (Bolton et al., 2005).
What methods study these mechanisms?
Mutant generation assesses oxalic acid roles (Godoy et al., 1990), genomics identifies effectors (Amselem et al., 2011), and biochemical assays measure redox manipulation (Williams et al., 2011).
What are key papers?
Bolton et al. (2005; 1118 citations) reviews biology; Amselem et al. (2011; 1053 citations) provides genome; Cessna et al. (2000; 552 citations) proves oxalic acid suppresses defenses.
What open problems exist?
Unresolved issues include effector host targets, oxalic acid regulation feedback, and molecular basis of 400+ host range (Boland and Hall, 1994; Amselem et al., 2011).
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