naa a22 4500 510751563 CHVBK 20180411083106.0 cr unu---uuuuu 180411e20130801xx s 000 0 eng 10.1007/s11270-013-1659-1 doi (NATIONALLICENCE)springer-10.1007/s11270-013-1659-1 Physiological Effects of Exposure to Arsenic, Mercury, Antimony and Selenium in the Aquatic Moss Fontinalis antipyretica Hedw [Elektronische Daten] [Santiago Díaz, Rubén Villares, María Vázquez, Alejo Carballeira] Laboratory experiments were carried out to determine the effects of exposure to different concentrations of As, Hg, Sb and Se on photosynthetic and respiratory rates and on photosynthetic efficiency in the aquatic bryophyte Fontinalis antipyretica Hedw. Specimens of the moss, collected from a clean site, were incubated in solutions of As, Hg, Sb and Se (at concentrations ranging from 0.1μgl−1 to 10,000μgl−1) for up to 22days. The photosynthetic and respiratory rates were then determined by the light/dark bottle technique, and the photosynthetic efficiency was measured by the saturation pulse method. Although different responses were observed in relation to the concentration of the elements, clear responses in net photosynthesis and photosynthetic efficiency were generally only observed in the moss exposed to the highest concentrations of these elements in solution. Mercury was apparently the most toxic of the elements studied. Net photosynthesis and photosynthetic efficiency were also related to tissue concentrations of these elements in the moss. Despite the higher toxicity of Hg, this element can be accumulated at high concentrations in moss, probably at extracellular sites. For Sb, the same tissue concentration had very different physiological effects depending on the initial concentration to which the moss was exposed in solution. Temporal trends in chlorophyll fluorescence were more stable than trends in net photosynthesis. The respiratory rate was very variable and was not clearly related to the concentration of elements in solution or in moss tissues. Springer Science+Business Media Dordrecht, 2013 Photosynthesis nationallicence Respiration nationallicence Photosynthetic Efficiency nationallicence Bryophytes nationallicence Díaz Santiago Ecología, Facultad de Biología, Universidad de Santiago de Compostela, Santiago de Compostela, Spain aut Villares Rubén Ecología, Escuela Politécnica Superior, Universidad de Santiago de Compostela, Lugo, Spain aut Vázquez María Ecología, Escuela Politécnica Superior, Universidad de Santiago de Compostela, Lugo, Spain aut Carballeira Alejo Ecología, Facultad de Biología, Universidad de Santiago de Compostela, Santiago de Compostela, Spain aut Water, Air, & Soil Pollution Springer Netherlands 224/8(2013-08-01), 1-14 0049-6979 224:8<1 2013 224 11270 https://doi.org/10.1007/s11270-013-1659-1 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11270-013-1659-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Díaz Santiago Ecología, Facultad de Biología, Universidad de Santiago de Compostela, Santiago de Compostela, Spain aut NATIONALLICENCE 700 1- Villares Rubén Ecología, Escuela Politécnica Superior, Universidad de Santiago de Compostela, Lugo, Spain aut NATIONALLICENCE 700 1- Vázquez María Ecología, Escuela Politécnica Superior, Universidad de Santiago de Compostela, Lugo, Spain aut NATIONALLICENCE 700 1- Carballeira Alejo Ecología, Facultad de Biología, Universidad de Santiago de Compostela, Santiago de Compostela, Spain aut NATIONALLICENCE 773 0- Water, Air, & Soil Pollution Springer Netherlands 224/8(2013-08-01), 1-14 0049-6979 224:8<1 2013 224 11270 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer