Hello friends! I am a PhD student from India and would like to have some suggestions regarding a problem. I would need to express my gene of interest in (only) the roots of Arabidopsis to track some phenotypes in the plants. I came across some promoters that express in the roots, but their expressions are confined to some tissue layers or some parts of the roots and I am looking for a promoter that would constitutively express in the whole root without any leakages in other parts (not even the hypocotyl) of the plant.

Hence, it would be helpful if someone can suggest me any promoters that suit these conditions.

Thanks in Advance!