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Question

Ringing/girdling experiment was first performed by

A
Malpighi
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B
Strasburger
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C
Godlewski
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D
Bose
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Solution

The correct option is A Malpighi
The ascent of sap can be defined as the passage of absorbed water from root to the aerial parts of the plant. It occurs through xylem (lumen of tracheary elements or vessels and tracheids) with a rate of 10-75 cm / min. This can be demonstrated by ringing experiments (done by Malpighi, 1672; Stephen Hales, 1727; Hartig, 1837) or dipping the cut end of a fresh shoot (e.g., Balsam) in 2 percent eosin solution for about 30 minutes. The veins of the leaves turn red. Sections through stem and leaves indicate that the xylem vessels / tracheids turn red.
So, the correct answer is 'Malpighi'

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