No? I've seen so many humidity domes/etc. The thing is - I don't think it was rooted. It just fell over one day and when I picked it up, there didn't seem to be a root. I could be mistaken.... That's why I decided to go with the "dome". No clue.
The first thing a seed does is put a tap root down into the soil. If there was no root, there would be no plant.
Humidity domes are placed over cuttings (no roots) since they have limited ability to take up moisture from the soil, or even a water reservoir.