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Q.
Which one is a $C_{4}$ plant ?
(1) Maize
(2) Sugarcane
(3) Wheat
(4) Rice
BHUBHU 2005
Solution:
$C _{4}$ plants live in hot moist or arid and non-saline or saline habitat. They have Kranz anatomy. In Kranz anatomy, the mesophyll is undifferentiated and its cells occur in concentric layers around vascular bundles. These plants are called $C _{4}$ plants because of the first stable photosynthetic product being a $4 $ carbon compound. $C _{4}$ plants perform photosynthesis even when stomata are closed (from $CO _{2}$ produced in respiration), e. g., Maize, sugarcane, sorghum, panicum, amaranthus etc.