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Research Project: Management of Temperate-Adapted Fruit, Nut, and Specialty Crop Genetic Resources and Associated Information

Location: National Clonal Germplasm Repository

Title: Fragaria cascadensis K.E. Hummer: first investigation of volatile organic compounds of fruit

Author
item ULRICH, D - Julius Kuhn Institute
item OLBRICHT, K - Hansabred Gmbh & Co Kg
item WEISSE, K - Julius Kuhn Institute
item Hummer, Kim

Submitted to: Acta Horticulturae
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 4/7/2017
Publication Date: 4/20/2017
Citation: Ulrich, D., Olbricht, K., Weisse, K., Hummer, K.E. 2017. Fragaria cascadensis K.E. Hummer: first investigation of volatile organic compounds of fruit. Acta Horticulturae. 1156:679-682. doi: 10.17660/ActaHortic.2017.1156.99.

Interpretive Summary: In 2012, the Cascade strawberry was described as a new species from the Oregon Cascade Mountains. The objective of this study was to examine the aroma patterns of fruits of this strawberry in contrast to those of the Oregon alpine strawberry and the Virginian strawberry. These profiles were investigated by a laboratory technique called immersion stir bar sorptive extraction-gas chromatography-quadrupol mass spectrometry. The profile of the Cascade strawberry fruits is clearly separated from that of either of the other two strawberries considering 53 detected volatile organic compounds (VOC). Several compounds from different groups were identified: esters, ketones, terpenoids, lactones, furanones, aldehydes, alcohols, acids, and carotenoid derived compounds. Compounds, such as 2-undecanone, phenylmethyl acetate, and '-damascenone, were found in the alpine strawberry, but not in the Virginia strawberry or the Cascade strawberry. In contrast, the compound verbenone was detected only in the Cascade strawberry, though it did not appear in either the alpine or in the Virginiana strawberry. Linalool, an important aroma compound, is detectable with low amounts in fruit of the alpine and Virginia strawberry, but with six to ten fold times those values in the Cascade strawberry. A distinctive feature of the Cascade strawberry is the occurrence of high concentrations of acetophenone.

Technical Abstract: In 2012, Fragaria cascadensis was described as a decaploid strawberry species from the Oregon Cascade Mountains. The objective of this study was to examine the aroma patterns of fruits of this F. cascadensis in contrast to those of F. vesca ssp. bracteata (A. Heller) Staudt and F. virginiana ssp. platypetala (Rydberg) Staudt. These profiles were investigated by immersion stir bar sorptive extraction-gas chromatography-quadrupol mass spectrometry (Imm-SBSE-GC-qMS). The profile of F. cascadensis fruits is clearly separated from that of either F. vesca ssp. bracteata or F. virginiana ssp. platypetala considering 53 detected volatile organic compounds (VOC). Several compounds from different groups were identified: esters, ketones, terpenoids, lactones, furanones, aldehydes, alcohols, acids, and carotenoid derived compounds. Compounds, such as 2-undecanone, phenylmethyl acetate, and '-damascenone, were found in F. vesca, ssp bracteata, but not in F. virginiana ssp. platypetala or F. cascadensis. In contrast, the compound verbenone was detected only in F. cascadensis, though it did not appear in either the diploid F. vesca ssp. bracteata or in the octoploid F. virginiana ssp. platypetala. Linalool, an important aroma compound, is detectable with low amounts in fruit of F. vesca ssp. bracteata and F. virginiana ssp. platypetala, but with six to ten fold times those values in F. cascadensis. A distinctive feature of F. cascadensis is the occurrence of high concentrations of acetophenone.