Question:
Conduction of water through xylem by root pressure was first observed by:
Conduction of water through xylem by root pressure was first observed by:
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Stephen Hales is known as the father of plant physiology and made important observations on water movement and root pressure in plants.
Updated On: Jun 19, 2026
- Joseph Priestley
- Stephen Hales
- F. W. Went
- Emerson
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The Correct Option is B
Solution and Explanation
Step 1: Understand root pressure.
Root pressure is the positive pressure developed in roots due to absorption of water from soil.
This pressure helps in pushing water upward through the xylem vessels.
Step 2: Historical observation.
Stephen Hales was one of the earliest scientists to study water movement in plants.
He observed the role of root pressure in the conduction of water through xylem.
Step 3: Eliminate other options.
Joseph Priestley is associated with studies related to photosynthesis and air purification by plants.
F. W. Went is associated with auxin and plant growth hormones.
Emerson is associated with photosynthetic studies such as the Emerson effect.
Step 4: Final conclusion.
Hence, conduction of water through xylem by root pressure was first observed by \[ \boxed{\text{Stephen Hales}} \]
Root pressure is the positive pressure developed in roots due to absorption of water from soil.
This pressure helps in pushing water upward through the xylem vessels.
Step 2: Historical observation.
Stephen Hales was one of the earliest scientists to study water movement in plants.
He observed the role of root pressure in the conduction of water through xylem.
Step 3: Eliminate other options.
Joseph Priestley is associated with studies related to photosynthesis and air purification by plants.
F. W. Went is associated with auxin and plant growth hormones.
Emerson is associated with photosynthetic studies such as the Emerson effect.
Step 4: Final conclusion.
Hence, conduction of water through xylem by root pressure was first observed by \[ \boxed{\text{Stephen Hales}} \]
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