Floral Aromatics of Ptelea: Chemical Identification and Human Response
Many members of the citrus family (Rutaceae) are valued for the aromatic compounds emitted by their flowers. Ptelea species are unusually cold-hardy members of the Rutaceae, but conflicting descriptions of the fragrance of their unisexual flowers may discourage the use of these trees. We analyzed fl...
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| Format: | Article |
| Language: | English |
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American Society for Horticultural Science (ASHS)
2021-12-01
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| Series: | Journal of the American Society for Horticultural Science |
| Subjects: | |
| Online Access: | https://journals.ashs.org/jashs/view/journals/jashs/147/1/article-p25.xml |
| _version_ | 1828553358859829248 |
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| author | Anna J. Talcott Stewart Terri Boylston Lester Wilson William R. Graves |
| author_facet | Anna J. Talcott Stewart Terri Boylston Lester Wilson William R. Graves |
| author_sort | Anna J. Talcott Stewart |
| collection | DOAJ |
| description | Many members of the citrus family (Rutaceae) are valued for the aromatic compounds emitted by their flowers. Ptelea species are unusually cold-hardy members of the Rutaceae, but conflicting descriptions of the fragrance of their unisexual flowers may discourage the use of these trees. We analyzed floral volatiles and human response to these chemicals to test the hypothesis that the fragrance of staminate and pistillate flowers of these species differs. Gas chromatography and mass spectrometry showed that most volatile chemicals emitted by flowers of Ptelea trifoliata and Ptelea crenulata are monoterpenes, sesquiterpenes, and esters. Most volatiles were emitted from flowers of both sexes, but ethyl benzoate and estragole were emitted only from pistillate flowers. When concentrations of aromatics differed between sexes, they were higher for pistillate flowers, except for cis-3-hexenyl butanoate and an unidentified terpene. For P. crenulata and P. trifoliata, respectively, 81% and 77% of survey responses were from volunteers who liked the fragrance. Panelists most frequently described the scent of flowers of P. crenulata of both sexes with the words citrus, lime, and sweet. Panelists distinguished between pistillate and staminate flowers of P. trifoliata, describing the odor of pistillate flowers most frequently with the words damp-earthy, spicy, and sweet; staminate flowers were perceived as light, fresh, grassy, and pleasant. This work represents the first analysis of floral volatiles of P. crenulata and resolves conflicting prior reports regarding the floral fragrance of P. trifoliata. We conclude that differences among people rather than the sex of flowers account for conflicting prior reports of floral fragrance. The scents of flowers of P. crenulata and P. trifoliata appeal to most people and are horticultural assets of these trees. |
| first_indexed | 2024-12-12T05:16:00Z |
| format | Article |
| id | doaj.art-4f8a0b3e667443f5bfcb30c0a12eefd9 |
| institution | Directory Open Access Journal |
| issn | 2327-9788 |
| language | English |
| last_indexed | 2024-12-12T05:16:00Z |
| publishDate | 2021-12-01 |
| publisher | American Society for Horticultural Science (ASHS) |
| record_format | Article |
| series | Journal of the American Society for Horticultural Science |
| spelling | doaj.art-4f8a0b3e667443f5bfcb30c0a12eefd92022-12-22T00:36:45ZengAmerican Society for Horticultural Science (ASHS)Journal of the American Society for Horticultural Science2327-97882021-12-011471110https://doi.org/10.21273/JASHS05119-21Floral Aromatics of Ptelea: Chemical Identification and Human ResponseAnna J. Talcott StewartTerri BoylstonLester WilsonWilliam R. GravesMany members of the citrus family (Rutaceae) are valued for the aromatic compounds emitted by their flowers. Ptelea species are unusually cold-hardy members of the Rutaceae, but conflicting descriptions of the fragrance of their unisexual flowers may discourage the use of these trees. We analyzed floral volatiles and human response to these chemicals to test the hypothesis that the fragrance of staminate and pistillate flowers of these species differs. Gas chromatography and mass spectrometry showed that most volatile chemicals emitted by flowers of Ptelea trifoliata and Ptelea crenulata are monoterpenes, sesquiterpenes, and esters. Most volatiles were emitted from flowers of both sexes, but ethyl benzoate and estragole were emitted only from pistillate flowers. When concentrations of aromatics differed between sexes, they were higher for pistillate flowers, except for cis-3-hexenyl butanoate and an unidentified terpene. For P. crenulata and P. trifoliata, respectively, 81% and 77% of survey responses were from volunteers who liked the fragrance. Panelists most frequently described the scent of flowers of P. crenulata of both sexes with the words citrus, lime, and sweet. Panelists distinguished between pistillate and staminate flowers of P. trifoliata, describing the odor of pistillate flowers most frequently with the words damp-earthy, spicy, and sweet; staminate flowers were perceived as light, fresh, grassy, and pleasant. This work represents the first analysis of floral volatiles of P. crenulata and resolves conflicting prior reports regarding the floral fragrance of P. trifoliata. We conclude that differences among people rather than the sex of flowers account for conflicting prior reports of floral fragrance. The scents of flowers of P. crenulata and P. trifoliata appeal to most people and are horticultural assets of these trees.https://journals.ashs.org/jashs/view/journals/jashs/147/1/article-p25.xmlaromatic compoundsfragrancegas chromatographymass spectrometrynursery crops |
| spellingShingle | Anna J. Talcott Stewart Terri Boylston Lester Wilson William R. Graves Floral Aromatics of Ptelea: Chemical Identification and Human Response Journal of the American Society for Horticultural Science aromatic compounds fragrance gas chromatography mass spectrometry nursery crops |
| title | Floral Aromatics of Ptelea: Chemical Identification and Human Response |
| title_full | Floral Aromatics of Ptelea: Chemical Identification and Human Response |
| title_fullStr | Floral Aromatics of Ptelea: Chemical Identification and Human Response |
| title_full_unstemmed | Floral Aromatics of Ptelea: Chemical Identification and Human Response |
| title_short | Floral Aromatics of Ptelea: Chemical Identification and Human Response |
| title_sort | floral aromatics of ptelea chemical identification and human response |
| topic | aromatic compounds fragrance gas chromatography mass spectrometry nursery crops |
| url | https://journals.ashs.org/jashs/view/journals/jashs/147/1/article-p25.xml |
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