(Kat Bryant | The Daily World) Bumblebees love visiting Dale Dineen’s lavender field.

New Study discovers gene that makes lavender smell sweet

UBC Okanagan believes the study could lead to better smelling lavender

For many, summer isn’t complete without fields of purple and the sweet smell of lavender.

Valued especially for its pleasant aroma, a new study from UBC’s Okanagan campus has discovered the gene that gives lavender its iconic smell and researchers hope that one day it might lead to a super-smelling plant.

Lavender essential oil contains many different types of compounds, but one in particular—S-linalool—is responsible for giving the plant a well-known sweet aroma.

Related: Steele: Lavender, a high-performance xeriscape plant

“There are many desirable compounds within the flowering body of lavender that produce its essential oil, each controlled by a host of different genes,” said Soheil Mahmoud, associate professor of biology at UBC Okanagan and study lead author. “Scientists have been trying to identify and sequence the gene responsible for the oil’s sweet smell for years, especially given its obvious application in the cosmetic industry.”

The problem is that the genetic instructions that produce the sweet compound have been poorly understood. Mahmoud explains that the gene, which is responsible for a protein that synthesizes the valuable compound, is rarely expressed and produces only very small quantities of the sweet molecule. That has made it difficult to isolate and study.

But Mahmoud and his team were able to overcome the challenge by sequencing an RNA copy of the gene—a temporary blueprint that gets copied and released into a cell as it gets turned into a functioning protein. From there, they were able to sequence the gene and model its function.

Related: Lavender can create natural pesticides

“Now that we have the gene sequence and understand how it works, the next step is to engineer a version of the gene that produces even more of the valuable S-linalool,” Mahmoud said. “Lavender essential oils rich in S-linalool are extremely expensive, so a super sweet-smelling lavender plant would certainly be appealing to the cosmetic and fragrance industries.”

“It’s exciting to find the mechanism that gives one of my favourite plants its wonderful smell.”

The research was published in the journal Planta with funding from the Natural Sciences and Engineering Research Council of Canada.

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