Unlike auxins, its movement does not exhibit polarity.  
It was first identified by Frederick Addicott in 1963 and originally called dormin since it was thought to play a role in bud dormancy.  It is synthesized from the 40-carbon carotenoid violaxanthin, which is converted to xanthonin and then this compound's aldehyde.  Unlike auxins, its movement does not exhibit polarity.  It induces the closure of stomata, inhibits shoot growth despite its lack of influence on roots, and inhibits the effects of gibberellins on synthesizing a-amylase.  FTP, identify this plant compound named after its ability to cut fruits from plant stems.
It was first identified by Frederick Addicott in 1963 and originally called dormin since it was thought to play a role in bud dormancy.  
abscisic acid