Spartina densiflora demonstrates high tolerance to phenanthrene in soil and reduces it concentration |
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| Authors: | Redondo-Gómez Susana Andrades-Moreno Luis Parra Raquel Valera-Burgos Javier Real Miguel Mateos-Naranjo Enrique Cox Lucía Cornejo Juan |
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| Institution: | a Departamento de Biología Vegetal y Ecología, Facultad de Biología, Universidad de Sevilla, Apartado 1095, Sevilla 41080, Spain
b Instituto de Recursos Naturales y Agrobiología (CSIC), Reina Mercedes 10, Sevilla 41012, Spain |
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| Abstract: | The present study was conducted to investigate the tolerance of Spartina densiflora to phenanthrene, and to test its ability in phenanthrene dissipation. A glasshouse experiment was designed to investigate the effect of phenanthrene from 0 to 1000 mg kg−1 on growth and photosynthetic apparatus of S. densiflora by measuring chlorophyll fluorescence parameters, gas exchange and photosynthetic pigments. We also performed chemical analysis of plant samples, and determined the concentration of phenanthrene remaining in soil. S. densiflora survived to concentrations as high as 1000 mg kg−1 phenanthrene in soil; in fact, there was no significant difference in RGR among the treatments after 30 days. Otherwise, phenanthrene affected photosynthetic apparatus at 100 and 1000 mg kg−1; thus, the lower ΦPSII could be explained by the declined photosynthetic pigment concentrations. Soil extraction indicated a more marked rate of phenanthrene disappearance in the soil in the presence of S. densiflora. |
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| Keywords: | Phenanthrene tolerance Growth rate Photosynthesis Phytoremediation Soil contamination |
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