Indole-3-acetic acid is by far the most potent of these hormones.
Only tordon lacks a phenyl ring, but all of these have a carboxylic acid group. Indole-3-acetic acid is by far the most potent of these hormones. Large quantities stimulate ethylene production, so many are used as herbicides, especially since weeds like dandelions are dicots and therefore particularly susceptible. As naturally secreted, they differentiate xylem from phloem and suppress lateral bud growth. FTP, name this large class of plant hormones, which can be used to delay fruit maturation and have synergistic effects with gibberellins
Only tordon lacks a phenyl ring, but all of these have a carboxylic acid group.
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