Abstract
Atmospheric gaseous pollutants can induce qualitative and quantitative changes in airborne pollen characteristics. In this work, it was investigated the effects of carbon dioxide (CO2) on Acer negundo pollen fertility, protein content, allergenic properties, and carbohydrates. Pollen was collected directly from the anthers and in vitro exposed to three CO2 levels (500, 1000, and 3000 ppm) for 6 and 24 h in an environmental chamber. Pollen fertility was determined using viability and germination assays, total soluble protein was determined with Coomassie Protein Assay Reagent, and the antigenic and allergenic properties were investigated by sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE) and immunological techniques using patients’ sera. Also, pollen fructose, sucrose, and glucose values were determined. Carbon dioxide exposure affected negatively pollen fertility, total soluble protein content, and fructose content. The patient sera revealed increased IgE reactivity to proteins of A. negundo pollen exposed to increasing levels of the pollutant. No changes were detected in the SDS-PAGE protein profiles and in sucrose and glucose levels. Our results indicate that increase in atmospheric CO2 concentrations can have a negative influence of some features of A. negundo airborne pollen that can influence the reproductive processes as well as respiratory pollen allergies in the future.
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Acknowledgments
This work was funded by the FEDER, COMPETE Program (PEst-OE/CTE/UI0039/2011—UI 39) and Foundation for Science and Technology (PTDC/AAC-AMB/102796/2008). Ribeiro, H. benefits from a scholarship financed by the QREN-POPH and Foundation for Science and Technology (SFRH/BDP/43604/2008).
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Silva, M., Ribeiro, H., Abreu, I. et al. Effects of CO2 on Acer negundo pollen fertility, protein content, allergenic properties, and carbohydrates. Environ Sci Pollut Res 22, 6904–6911 (2015). https://doi.org/10.1007/s11356-014-3896-2
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DOI: https://doi.org/10.1007/s11356-014-3896-2