GK
BIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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When the bark of a tree is removed in a circular fashion all around near its base it gradually dries up and dies because-
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Water from soil cannot rise to aerial parts.
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Roots are staryed of energy.
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Tree is infected by soil microbes.
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Root do not receive oxygen for respiration.
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Explanation:
Detailed explanation-1: -Detailed Solution. The correct answer is Roots are starved of energy.
Detailed explanation-2: -Complete girdling (the bark removed from a band completely encircling the tree) will certainly kill the tree. The reason for damage due to girdling is that the phloem layer of tissue just below the bark is responsible for carrying food produced in the leaves by photosynthesis to the roots.
Detailed explanation-3: -The secondary phloem is removed as it is a part of bark and sugars cannot be transported to the plant parts located below the girdle. The lower plant parts consequently die. The upper parts of plant continue to receive water and mineral supply because they are conducted through xylem elements.
There is 1 question to complete.