科学家发现使陈年老酒变香的酶

Researchers have discovered an enzyme¹ that plays a leading role in the formation of compounds that give aged² wines their sought-after aroma³. The enzyme is a member of the cytochrome P450 family of enzymes⁴, which are involved in the formation and breakdown⁵ of various molecules⁶ and chemicals. By analyzing⁷ a large sample of French grapes and white wines through a technique called liquid chromatograph mass spectrometry, the investigators⁸ found that, during grape growth, this enzyme (named CYP76F14) helps to convert a common plant compound, monoterpenol linalool, into a different compound, (E)-8-carboxylinalool. The formation of this compound is an important next step on the road to aroma: as wine ages, (E)-8-carboxylinalool is gradually converted into wine lactone, which gives old wine its nose.

 

In addition to contributing to our understanding of where wine aroma comes from, this discovery could also impact the grapevine breeding and wine making industries, other fruit research and breeding, as well as aspects of aroma and scent⁹ in the beverage¹⁰ and food industries.

 

"Combining different analytical¹¹ techniques was key in our work, and this broad picture helped us learn more about how common plant molecules are transformed into specific wine aroma," said Dr. Nicolas Navrot, senior author of the New Phytologist article.

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