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Is the flower fluorescence relevant in biocommunication?
Analía Iriel1, María Gabriela Lagorio
1INQUIMAE/Dpto. de Química Inorgánica, Analítica y Qca. Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pabellón II, 1er piso, C1428EHA, Buenos Aires, Argentina.
Die Naturwissenschaften
|September 3, 2010
Summary
Flower fluorescence, measured by fluorescence quantum yield (Φ(f)), was investigated as a pollinator attractant. Results indicate fluorescence is negligible compared to reflected light, suggesting it
Area of Science:
- Plant biology
- Biophotonics
- Pollination ecology
Background:
- Flower fluorescence has been hypothesized as a visual cue for attracting pollinators.
- Understanding floral optical properties is crucial for deciphering plant-pollinator interactions.
Purpose of the Study:
- To quantitatively assess the fluorescence quantum yield (Φ(f)) in various flower species.
- To compare fluorescence emission with reflected light to determine its role in visual signaling.
- To calculate quantum catches to evaluate visual sensitization by photoreceptors.
Main Methods:
- Quantitative measurement of fluorescence quantum yield (Φ(f)) for 11 diverse flower species.
- Comparison of emitted fluorescent photons with reflected photons.
- Calculation of quantum catches for each species.
Main Results:
- Highest fluorescence quantum yields (Φ(f)) were observed in Ornithogalum thyrsoides ovaries (0.030) and Citrus aurantium petals (0.014) and stigma (0.013).
- Fluorescence emission was found to be negligible relative to reflected light across all studied samples.
- Calculated quantum catches provided insights into visual sensitization.
Conclusions:
- Flower fluorescence is unlikely to function as a significant optical signal in biocommunication for pollination.
- Reflected light plays a dominant role in floral visual signaling.
- Further research into floral optical properties and pollinator vision is warranted.
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