| Title: | The Nighttime Fragrance of Guettarda scabra (Rubiaceae): Flower Scent and Its Implications for Moth Pollination |
| Author(s): | Pimienta MC; Salazar D; Koptur S; |
| Address: | "Department of Biological Sciences, International Center for Tropical Botany, Institute of the Environment, Florida International University, Miami, FL 33199, USA. Department of Biological Sciences, Binghamton University, Binghamton, NY 13902, USA" |
| DOI: | 10.3390/molecules28176312 |
| ISSN/ISBN: | 1420-3049 (Electronic) 1420-3049 (Linking) |
| Abstract: | "Floral scent is crucial for attracting pollinators, especially in plants that bloom at night. However, chemical profiles of flowers from nocturnal plants with varied floral morphs are poorly documented, limiting our understanding of their pollination ecology. We investigated the floral scent in Guettarda scabra (L.) Vent. (Rubiaceae), a night-blooming species with short- and long-styled floral morphs, found in the threatened pine rocklands in south Florida, US. By using dynamic headspace sampling and GC-MS analysis, we characterized the chemical profiles of the floral scent in both morphs. Neutral red staining was also employed to determine the specific floral regions responsible for scent emission in G. scabra. The results revealed that G. scabra's fragrance consists entirely of benzenoid and terpenoid compounds, with benzeneacetaldehyde and (E)-beta-ocimene as dominant components. There were no differences in the chemical profiles between the long- and short-styled flowers. Staining assays indicated that the corolla lobes, anthers, and stigma were the primary sources of the scent. These findings indicate that G. scabra's floral scent is consistent with that of night-blooming plants pollinated by nocturnal hawkmoths, providing important insights into its chemical ecology and pollinator attraction. This study demonstrates how floral scent chemistry can validate predictions based on flower morphology in hawkmoth-pollinated plants" |
| Keywords: | Animals *Moths *Rubiaceae Odorants Pollination Flowers *Perfume Pheromones Gc-ms VOCs flower scent night-blooming plant pine rockland scent localization volatile organic compounds; |
| Notes: | "MedlinePimienta, Maria Cleopatra Salazar, Diego Koptur, Suzanne eng Society for Integrative and Comparative Biology (SICB Grant-in-Aid Research)/ Botanical Society of America/ Kelly Foundation for Tropical Botany/ FIU Tropics/ Switzerland 2023/09/09 Molecules. 2023 Aug 29; 28(17):6312. doi: 10.3390/molecules28176312" |
