Amorphophile,
as I said, the opinion is expressed generally, that the tubers make what they want.
That is internally of course "Pflanzenhormen" controlled, combined will depend on many factors (previous growing season, size of the bulb temperature during storage etc.pp).
In the tranquillity and rest refraction of our tubers, presumably primarily Abscisinsäure ("Schlafhormon", suspension of foliation) are Gibberillinsäure ("to alarm", quiet Crusher), and ethylene ("maturing hormone") have influence. Accurate investigations, which may exist, are but not known to me.
I myself have once Amorphophallus konjac and Typhonium venosum Cormels ppm treated Gibberilinsäure with 500, but there was no difference to the untreated control.
In the aroid L, there was the enthusiastic report that Dracunculus vulgaris and various Amorphophallusarten had been brought by ethylene to the synchronous emergence last year. To do this, the tubers with ripening bananas, which emit ethylene, were placed in a plastic bag.
The author has not reviewed this year that, with the result that he this year has still tubers that are not driven out. Also he has not written in the previous year, whether he has made a control (without ethylene).
I would be so careful with the indication and in-house tests. This was a single observation and "Physiological status" of various tubers is certainly so different that I may believe not without multiple repetition, that the method for all tubers and types of work. I would be definitely not Einzeknollen of a way for such an experiment on's game.
But it may well be something.
When I think about a few tubers with bananas or apples in a bag come next spring.
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Happy reading, Bernhard.