Q.
Which of the following prevents the fall of fruits?
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AIPMTAIPMT 2001Plant Growth and Development
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Solution:
NAA (Naphthalene acetic acid) is a synthetic auxin. It is produced artificially. It inhibits the abscission. It prevents the formation of a layer called abscission layer which is formed between the organs like fruits, flowers, etc. and the stem. It is a layer of dead cells which causes fruit fall. As NAA prevents the formation of this layer, so it prevents the fall of fruits.