Journal
MARINE POLLUTION BULLETIN
Volume 79, Issue 1-2, Pages 34-38Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.marpolbul.2014.01.009
Keywords
Growth; Diesel tolerance; Mycorrhizal index; Nutrient status; Photosynthesis; Soil contamination
Funding
- Council of the National University of Rosario (Argentina) [AGR-164]
- Spanish Science and Technology Ministry and Andalusian Council [CTM2008-04453, P11-RNM-7274]
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The present study was conduced to investigate the tolerance limits of Spartina argentinensis, which occurs in inland marshes of the Chaco-Pampean regions of Argentina, to diesel-contaminated soil. A glasshouse experiment was designed to investigate the effect of diesel fuel from 0% to 3% on growth and photosynthetic apparatus of S. densiflora by measuring gas exchange and photosynthetic pigments. We also performed chemical analysis of plant samples, and determined mycorrhizal index. Tiller and root biomasses declined with increasing diesel fuel concentration, as well as photosynthetic rate (A). Reductions in A could be accounted for by non-stomatal limitations. Mycorrhizal roots of S. argentinensis were reduced by the presence of diesel fuel, but did not affect its nutritional status; in fact, most element concentrations increased with diesel contamination. Despite the negative effect of diesel-contaminated soil, S. argentinensis continued growing, which could be useful management options for phytorremediation of diesel-contaminated soils. (C) 2014 Elsevier Ltd. All rights reserved.
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