Q.16 Match List I with List II
| LIST I Name |
LIST II Organism |
|---|---|
| A. Black wart disease of potato | I. Synchytrium endobioticum |
| B. Black Mould | II. Achlya bisexualis |
| C. Water Mould | III. Aspergillus niger |
| D. Blue or Green Mold | IV. Penicillium chrysogenum |
Choose the correct answer from the options given below:
- A-IV, B-II, C-III, D-I
- A-III, B-I, C-IV, D-II
- A-II, B-IV, C-I, D-III
- A-I, B-III, C-II, D-IV
A-I, B-III, C-II, D-IV is the correct matching for these plant pathology diseases and their causal organisms.
Question Breakdown
This matching question tests classical plant pathology associations between disease names and fungal pathogens. Each disease represents distinct fungal groups: chytrid (A), aspergillus (B), oomycete (C), and penicillium (D).
Option Analysis
Correct Matching:
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A. Black wart disease of potato → I. Synchytrium endobioticum (Chytridiomycota): Obligate biotrophic chytrid causing potato wart disease. Produces cauliflower-like galls on tubers; quarantine pathogen persisting 30+ years in soil.
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B. Black mould → III. Aspergillus niger (Ascomycota): Black-spored saprophyte on fruits, grains, jaggery. Citric acid producer industrially.
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C. Water mould → II. Achlya bisexualis (Oomycota): Aquatic saprophyte/parasite causing damping-off in seedlings. Classic water mold example.
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D. Blue or Green mold → IV. Penicillium chrysogenum (Ascomycota): Penicillin producer; blue-green mold on citrus, bread post-harvest.
Correct Answer: A-I, B-III, C-II, D-IV
Black wart disease of potato matching with Synchytrium endobioticum, black mould with Aspergillus niger, water mould with Achlya bisexualis, and blue-green mold with Penicillium chrysogenum represents classic plant pathology associations essential for competitive exams.
Disease-Pathogen Relationships
Disease (List I) Pathogen (List II) Key Characteristics A. Black wart potato I. Synchytrium endobioticum Chytrid, soil quarantine, tuber galls B. Black mould III. Aspergillus niger Black spores, citric acid industry C. Water mould II. Achlya bisexualis Oomycete, aquatic, damping-off D. Blue/Green mold IV. Penicillium chrysogenum Penicillin, citrus rot Agricultural Importance
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Synchytrium: EU/US quarantine; resistant cultivars (Sen1 gene).
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A. niger: Dual role (spoilage vs. 70% global citric acid).
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Achlya: Model for oomycete sexuality studies.
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Penicillium: Post-harvest loss + antibiotic revolution.
Exam Tip: Remember “Black wart = Synchytrium” as the only chytrid disease among options.
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