1-Naphthaleneacetic acid (NAA)

1-Naphthaleneacetic acid (NAA) is a synthetic phytohormone auxin that is added to cell culture media such as Murashige & Skoog media and Chu′s N6 media.

to modify MS media for the initiation of callus
 
as a supplement in solid K3 medium for the selection of transformants

in the preparation of culture medium like V-KM medium and Cg medium