What compound is primarily responsible for the characteristic earthy or beet-like flavor in many ulluco varieties, chemically linked to petrichor?
Answer
Geosmin
The distinct, sometimes divisive, earthy flavor profile often associated with ulluco, reminiscent of beets, is caused by the presence of the compound geosmin. Geosmin is a specific organic compound that is well-known in sensory science for creating the characteristic scent of moist soil after rain, a phenomenon termed petrichor. While this flavor is common in many ulluco tubers, the text clarifies that this earthy taste is not universal; some varieties may possess very little or none of this flavor component. This variability in geosmin concentration directly relates to consumer preference, leading growers to selectively cultivate varieties that offer a milder taste profile.
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