The Question is from neet-botany morphology-of-flowering-polants , and it was created by the author K SURESH KUMAR

Question

The bulliform cells in the leaves of certain grasses play a crucial role in:

K SURESH KUMAR · Accepted Answer

## CORE INFORMATION
✓ **Answer**: C
## CONCEPT FRAMEWORK
 **Primary Concept**: Plant anatomy and physiology, specifically adaptations of grasses to water stress.
 **Related Topics**:  Leaf morphology, water potential, turgor pressure.
 **Prerequisites**: Basic understanding of plant cell structure and function.
## SOLUTION PATHWAY
**Given Information**:
  The question asks about the function of bulliform cells in grass leaves.
  Bulliform cells are specialized epidermal cells found in the leaves of many grasses.
**Method & Steps**:
 1. Identify the role of bulliform cells.
  Reasoning: Bulliform cells are large, thin-walled cells containing a large vacuole.  Their size and water content influence the leaf's shape.
  Formula/Rule: No formula is directly applicable.
 2. Consider how the leaf's shape changes with water availability.
  Working: When water is abundant, bulliform cells are turgid (full of water), causing the leaf to remain flat.  When water is scarce, these cells lose turgor pressure, causing the leaf to roll inward. This rolling reduces water loss through transpiration.
  Key Point: The leaf rolling is a mechanism to conserve water under drought conditions.
 3. Determine the correct option.
  Result: The primary function of bulliform cells is leaf rolling and unfolding in response to water availability.
  Verification: This is consistent with the known structure and function of bulliform cells.
 ## OPTION ANALYSIS
A :x: Increasing the photosynthetic surface area is not the primary function of bulliform cells; other leaf structures contribute more significantly to this.
B :x: Bulliform cells do not secrete resinous substances.  Resin secretion is typically associated with specialized glands or ducts in plants.
C ✓: Leaf rolling and unfolding in response to water availability is the correct answer. This is the primary role of bulliform cells.
D :x: Bulliform cells do not store water.  They regulate water loss by influencing leaf shape.
 ## LEARNING AIDS
 **Common Mistakes**:
  1.Confusing bulliform cells with other specialized cells in plants (e.g., guard cells, trichomes).
   How to avoid:  Learn the distinct features and functions of different plant cell types.
  2.Overlooking the adaptive significance of leaf rolling in grasses.
   How to avoid:  Understand the concept of transpiration and its importance in plant water balance.
 **Quick Tips**:
  1.Remember that bulliform cells are involved in a drought-avoidance mechanism.
  2.Associate bulliform cells with leaf rolling in grasses.

K SURESH KUMAR · Answer

Increasing the photosynthetic surface area.

K SURESH KUMAR · Answer

Secreting resinous substances for protection.

K SURESH KUMAR · Answer

The correct Option is "Leaf rolling and unfolding in response to water availability."

K SURESH KUMAR · Answer

Storing water for use during drought.

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