This is only my opinion and is based on my observation, and I would also like to understand more.
I might be alone on this theory, but believe it can be supported by other posts if you connect the dots.
You can read in the Org how sometimes someone has tossed a corm in a compost pile and it grew.
If it is growing, the roots are probably still connected to the corm and the person stopped turning the pile.
You should also be able to assume it is an active pile, if a viable corm was tossed in for composting.
Knowing that a properly aerated aerobic pile can reach high temperatures and if not turned will go anaerobic with much lower temperatures.
I can't say for certain but I assume the lower temperatures are better suited for the roots to grow in.
I think most of the confusion is in part to how some people define anaerobic bacteria as being "no oxygen" instead of "with little or no oxygen".
Here is some information that might be helpful.
"Anaerobic bacteria, or anaerobes, are bacteria that do not need oxygen to live."
"There are three categories of anaerobic bacteria: obligate, aerotolerant, and facultative. Obligate anaerobes need an oxygen-free environment to live. They cannot grow in places with oxygen, which can sometimes damage and destroy them. Aerotolerant bacteria do not use oxygen to live, but can exist in its presence. Facultative anaerobes use fermentation to grow in places without oxygen, but use aerobic respiration in places with oxygen."
What Is Anaerobic Bacteria?
Anaerobic organism - Wikipedia, the free encyclopedia
"Composting without oxygen results in fermentation."
"There is enough heat energy liberated in the process to raise the temperature of the putrefying material. In the anaerobic dissolution of the glucose molecule, only about 26 kcal of potential energy per gram of glucose molecules is released compared to 484 to 674 kcal for aerobic decomposition."
"Anaerobic composting may be accomplished in large, well packed stacks or other composting systems. These should contain 40% to 75% moisture, into which little oxygen can penetrate, or 80% to 99% moisture so that the organic material is a suspension in the liquid."
"Both aerobic and anaerobic composting require bacteria. Some bacteria work better in one or the other environment. Compost piles under aerobic conditions may attain a temperature of 140° to 160° F in one to five days depending upon the material and the condition of the composting operation. This temperature can also be maintained for several days before further aeration is needed. The heat necessary to produce and maintain this temperature must come from aerobic decomposition, which requires oxygen. After a period of time, the material will become anaerobic unless it is aerated. There is probably a period between the times when the oxygen is depleted and anaerobic conditions become evident, during which the process is aerobic."
Compost Fundamentals Biology & Chemistry - Anaerobic Fermentation