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What is the function of the xylem in plants?
Transport of water
Transport of food
Photosynthesis
Respiration
Transport of water
Xylem is a specialized vascular tissue in plants primarily responsible for the transport of water and dissolved minerals absorbed by the roots up to the stems and leaves. It forms a continuous conduit system essential for plant survival and hydration.
Xylem is a specialized vascular tissue in plants primarily responsible for the transport of water and dissolved minerals absorbed by the roots up to the stems and leaves. It forms a continuous conduit system essential for plant survival and hydration.
Xylem acts like a drinking straw that pulls water up from the roots to the leaves using suction generated by evaporation at the top.
Xylem up, phloem down (X transports water up, P transports food down).
╬и=╬иsтАЛ+╬иpтАЛ тАФ Water potential equation representing the sum of solute and pressure potentials governing water movement.
Water movement through xylem relies heavily on transpiration pull, root pressure, and capillary action. Evaporation of water from the leaf surface (transpiration) creates a negative pressure gradient, pulling water upward through the xylem vessels via cohesion and adhesion forces between water molecules and the cell walls.
Xylem transports water and dissolved minerals unidirectionally from roots to leaves.
Composed of dead and living cells including tracheids, vessel elements, xylem parenchyma, and xylem fibers.
Driven primarily by the physical mechanism of transpiration pull.
Water transport in tall trees against gravity
Mineral distribution from soil to aerial plant parts
| Feature | Xylem | Phloem |
|---|---|---|
Primary Function | Transport of water and minerals | Transport of organic food (sugars) |
Direction of Flow | Unidirectional (upward) | Bidirectional |
The movement of water in xylem does not require metabolic energy (ATP) from the plant, relying instead on physical forces.
Option B refers to phloem tissue function, whereas options C and D represent physiological processes (photosynthesis and respiration).
A is correct тАФ Xylem is the specialized vascular tissue in plants responsible for the transport of water and dissolved minerals from the roots to the rest of the plant.
For competitive exams, always link xylem with unidirectional upward transport of water and minerals, and phloem with bidirectional transport of food.
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