Question

Which experiments provide an evidence for the fact – “food is transported in the phloem cells”.

Explain it.​

Answer 1

Answer:

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Evidence to Support that Translocation occurs through the Phloem

1. Ringing or Girdling Experiment

In a healthy potted plant, all the tissue outer to the xylem including bark, cortex, and phloem is removed from a small portion of the woody stem (girdling). The upper and lower part of the plant is now attached only through the xylem.

After a few days, it is observed that the food material is accumulated just above the girdling. Also, the roots die first in the girdled plant. This may happen because the food is not transported to the roots. This experiment proves that phloem is responsible for translocation of organic material.

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