Question
Biology Question on Transport in Plants
Which of the following is done during ringing experiment ?
A
bark is removed
B
pith is removed
C
xylem is removed
D
all of these
Answer
all of these
Explanation
Solution
Ringing experiment is performed to study the path of translocation of food and water in plants. In ringing experiment, if ring or girdle of bark (phloem + cortex) is removed from a dicot plant, the leaves in upper part do not wilt because water continues to rise up through central xylem. In second set of experiment, when central portion (xylem) of dicot stem is removed, leaves in upper part wilt as water is unable to rise up. This shows the path of water translocation is xylem. When phloem + cortex is removed downwards food translocation stops.