How come your plants can get root rot in a pot, but not in plain water?

Question

I love plants and I have a couple of them, but in the beginning of keeping them I got root rot once or twice. This was with my plants in soil and getting too much water.

However, when you get propagations and are trying to grow out roots you put them in just water.

So how come you can grow them
in just water fine without getting root rot, but as soon as it’s in soil and gets a bit too much water the roots die???

In: Biology

Answer 1

Water contains dissolved air because it can filter in from the surface. Soil filled with water doesn’t because the air doesn’t circulate due to all the dirt keeping the water from moving. Hence the plant runs out of air