Question:
Perithecium is characterized by
Perithecium is characterized by
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Perithecium = flask-shaped ascocarp with an ostiole (opening at top).
Updated On: Jul 18, 2026
- Unopened globose fruiting body
- Flask shaped fruiting body without opening
- Flask shaped fruiting body with apical opening
- Cup shaped fruiting body
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The Correct Option is C
Solution and Explanation
Step 1: Understand the fungal structure concept.
Perithecium is a type of ascocarp found in Ascomycetes fungi. It is a specialized fruiting body where sexual spores (ascospores) are produced inside sac-like structures called asci. Its morphology is important for classification.
Step 2: Identify key morphological feature.
A perithecium is typically flask-shaped (pyriform structure). It is not fully open like an apothecium, but it has a narrow opening at the top called an ostiole through which spores are released.
Step 3: Differentiate from other ascocarps.
- Apothecium: cup-shaped and widely open - Cleistothecium: completely closed, no opening - Perithecium: flask-shaped with apical opening (ostiole)
Step 4: Functional significance.
The apical opening allows controlled release of ascospores into the environment. This structure provides protection to developing asci while still enabling spore dispersal when mature.
Step 5: Match with correct option.
Since perithecium is flask-shaped and possesses an apical opening (ostiole), it matches option (3).
Final Answer: \[ \boxed{\text{Flask shaped fruiting body with apical opening}} \]
Perithecium is a type of ascocarp found in Ascomycetes fungi. It is a specialized fruiting body where sexual spores (ascospores) are produced inside sac-like structures called asci. Its morphology is important for classification.
Step 2: Identify key morphological feature.
A perithecium is typically flask-shaped (pyriform structure). It is not fully open like an apothecium, but it has a narrow opening at the top called an ostiole through which spores are released.
Step 3: Differentiate from other ascocarps.
- Apothecium: cup-shaped and widely open - Cleistothecium: completely closed, no opening - Perithecium: flask-shaped with apical opening (ostiole)
Step 4: Functional significance.
The apical opening allows controlled release of ascospores into the environment. This structure provides protection to developing asci while still enabling spore dispersal when mature.
Step 5: Match with correct option.
Since perithecium is flask-shaped and possesses an apical opening (ostiole), it matches option (3).
Final Answer: \[ \boxed{\text{Flask shaped fruiting body with apical opening}} \]
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