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Is NAA a Hormone?

Published in Plant Hormones 2 mins read

Yes, NAA (Naphthyl Acetic Acid) is a synthetic auxin, a type of plant hormone.

NAA is widely used in agriculture and horticulture for various purposes, mimicking the effects of naturally occurring auxins. Auxins are plant hormones that play a crucial role in plant growth and development.

Here's a breakdown:

  • What are Auxins? Auxins are a class of plant hormones responsible for cell elongation, apical dominance, root initiation, and fruit development.
  • NAA as a Synthetic Auxin: NAA is created in a lab and acts like natural auxins when applied to plants. This allows control over certain aspects of their growth.
  • Common Uses:
    • Rooting Cuttings: NAA is frequently used to promote root formation in plant cuttings, facilitating vegetative propagation.
    • Fruit Thinning: It can be used to reduce the number of fruits on a tree, leading to larger and higher quality remaining fruits.
    • Preventing Premature Fruit Drop: NAA can help prevent fruits from falling off the tree before they are ripe.
    • Tissue Culture: NAA is also used in plant tissue culture to induce callus formation and root development.

In conclusion, while not naturally produced by plants, NAA is a synthetic compound that functions as a plant hormone (specifically an auxin), impacting plant growth and development in similar ways to natural auxins.