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  4. Girdle experiment involves the removal of ring wood of tissue outside the vascular cambium from the tree trunk. This leads to death of plant because

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Q. Girdle experiment involves the removal of ring wood of tissue outside the vascular cambium from the tree trunk. This leads to death of plant because

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Solution:

A simple experiment, called girdling, was used to identify the tissues through which food is transported. On the trunk of a tree, a ring of bark up to a depth of the phloem layer can be carefully removed. This simple experiment shows that phloem is the tissue responsible for translocation of food and that transport takes place in one direction, i.e., towards the roots. Vascular cambium forms phloem tissue outside and xylem towards the inside. Food synthesised in the leaves move to different parts of the plant through the phloem. When we remove this outer part (phloem), the lower parts do not get food and eventually die.