I don't see why it shouldn't work. However, and you probably already know this, but make sure you have potted the plants yourself or they come from a reputable source. I know over here in the states I have pulled plants out of pots that have metal bands around them and such which would have killed them if left on. And of course you will probably have to repot the plants every year or every other year as you should with most plants above water.
A marimo, java ferns, and even anacharis could work as well in a bare bottom tank. Though none of them would need pots. The anacharis could float at the top, and the other two should be fine floating around the bottom. Idk if the java fern would get rooty (is that a word?) in search of rocks or sub to hold onto.
And particular reason you want to go with a bare bottom tank? There isn't anything wrong with them, many breeders use them for grow out tanks, but I am curious about the draw, if you don't mind me asking. :)
Remember that the tank your fish lives in is his or her's whole world. Ask yourself this question, and answer it honestly: would you choose to live there?