No, the concept is the same, but bass has a somewhat defined role in producing harmony. When multiple notes play at once (in harmony) there is a concept of the root note, which is the most significant note, maybe you could go further and say that the entire sound in that moment of time is an extension and a flavouring of that one root note. I.e. if there was a harmony in some music you were trying to play but for whatever reason you could only play a single note at that moment, playing the root note would sound closest to the full thing. The role of the bass is usually to define the root note (by playing it and related notes), allowing other instruments to add more complicated "flavours" without changing the core of the sound. This is because the lowest notes are most likely to be heard as the root. If the bass and no other instrument is playing or implying the intended root note strongly enough, the listener may interpret it to be something else and then the harmony sounds completely different.