The mechanism behind this event is still not understood .
Mutants in the COI1 - dependent signaling pathway tend to show reduced inhibition , demonstrating that the COI1 pathway is somehow necessary for inhibiting root growth .
The mechanism behind this event is still not understood , but mutants in the COI1 - dependent signaling pathway tend to show reduced inhibition , demonstrating that the COI1 pathway is somehow necessary for inhibiting root growth .