Subject: How does fruit rot (what happens) and what gases are produced when it does?

We did an experiment in science that involved putting different kinds of fruit 
in containers and seeing which one produced the most gas (that top was covered 
with a balloon).  I want to know what biologically/chemically happened in the 
fruit as it rotted and what kinds of gases were produced.  We discussed what 
sugar content and acidity may have affected, but I want to understand what 
happeed and how.....

Re: How does fruit rot (what happens) and what gases are produced when it does?