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← Nature & AnimalsWhich mechanism causes the guttation of water droplets when root pressure in plants exceeds transpiration?
A)Decreased stomatal sucrose concentration.
B)Increased cuticular water repulsion.
C)Xylem embolism blocking water flow.
D)Hydathode exceedance of capacity.✓
💡 Explanation
Guttation occurs via hydathodes because positive root pressure forces xylem sap out since transpiration is low. Therefore, water droplets form at the leaf margins rather than diffusing via stomata and cuticles under higher transpiration.
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