Abstract
The major aim of the present study is to identify the relationship of physiological parameters of the photosynthetic system with the elemental content of the naturally growing lichen Pyxine cocoes. The epiphytic foliose lichen P. cocoes was used as biomonitoring indicator and effect of atmospheric pollutants on physiological integrity was examined. Potential quantum yield of Photosystem II (fluorescence ratio Fv/Fm), chlorophyll degradation ratio and quantitative estimation of Al, As, Cd, Cr, Cu, Pb, Fe and Zn contained in the lichen thallus were ascertained. Statistical analysis revealed significantly positive correlations between Fv/Fm and element contents (Al and Cr). The chlorophyll degradation as well as alteration in the pigment content was found to be the most sensitive parameters to assess the vitality of lichen thallus against polluted environment. The species accumulated higher amounts of elements (Al, As, Cu, Fe and Zn) in the polluted sites as compared to the non polluted sites. It was also evident from this study that vehicular emission played a significant role in the release of elements as pollutants in the surrounding environment. The effectiveness of this lichen could be further investigated by comparing this species with other biomonitors.
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Acknowledgments
The authors are grateful to Dr. C. S. Nautiyal, Director, CSIR-National Botanical Research Institute Lucknow, India for providing laboratory facilities to work. We are also thankful to U. P. Biodiversity Board, Uttar Pradesh. One of the authors (RB) is grateful to SERB Division, Department of Science and Technology (DST-SERB), New Delhi for Young Scientist Fellow (SR/FTP/ES-134/2010).
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Karakoti, N., Bajpai, R., Upreti, D.K. et al. Effect of metal content on chlorophyll fluorescence and chlorophyll degradation in lichen Pyxine cocoes (Sw.) Nyl.: a case study from Uttar Pradesh, India. Environ Earth Sci 71, 2177–2183 (2014). https://doi.org/10.1007/s12665-013-2623-5
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DOI: https://doi.org/10.1007/s12665-013-2623-5