transient gene expression assay show that ABA encheanced the promoter activity which containing the ABA-responsive element(ABRE), but not the promoter without the ABRE. why?
It has been shown that ABL1 is involved in the ABA and stress responses and mediates the cross talk of ABA and auxin by directly regulating a series of ABRE-containing downstream genes
Have a look here :http://www.plantphysiol.org/content/156/3/1397