In plant biology, Kranz anatomy is a highly specialized leaf structure found almost exclusively in C4 plants (like maize and sugarcane). The word 'Kranz' is German for 'wreath' or 'ring', reflecting the circular arrangement of cells in the leaf.
Kranz anatomy allows C4 plants to survive and photosynthesize efficiently in high temperatures and bright sunlight with minimal water loss.
Common examples of plants with Kranz anatomy include Sugarcane, Maize (Corn), and Sorghum.
Kranz anatomy features two distinct types of photosynthetic cells arranged in concentric rings around the vascular bundles (veins) of the leaf:
This unique structure is a brilliant evolutionary adaptation to prevent Photorespiration—a wasteful process that occurs in hot, dry climates.
No, C3 plants (like wheat and rice) lack this specialized bundle sheath arrangement, which makes them highly susceptible to wasteful photorespiration in hot weather.
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