naa a22 4500 510749577 CHVBK 20180411083059.0 cr unu---uuuuu 180411e20130901xx s 000 0 eng 10.1007/s11270-013-1660-8 doi (NATIONALLICENCE)springer-10.1007/s11270-013-1660-8 Plant Responses to Arsenic: the Role of Nitric Oxide [Elektronische Daten] [Fernanda Farnese, Juraci de Oliveira, Grasielle Gusman, Gabriela Leão, Cleberson Ribeiro, Luhan Siman, José Cambraia] Arsenic (As) toxicity and the effects of nitric oxide (NO), supplied as sodium nitroprusside (SNP), were analyzed in Pistia stratiotes. The plants, which were grown in nutrient solution at pH 6.5, were exposed to four treatments for 24h: control; SNP (0.1mg L−1); As (1.5mg L−1); and As + SNP (1.5 and 0.1mg L−1). As accumulated primarily in the roots, indicating the low translocation factor of P. stratiotes. The As accumulation triggered a series of changes with increasing production of reactive oxygen intermediates and damage to cell membranes. The application of SNP was able to mitigate the harmful effects of As. This attenuation was probably due to the action of the SNP as an antioxidant, reducing the superoxide anion concentration, and as a signaling agent. Acting as a signal transducer, SNP increased the activity of enzymatic antioxidants (POX, CAT, and APX) in the leaves and stimulated the entire phytochelatins biosynthetic pathway in the roots (increased sulfate uptake and synthesis of amino acids, non-proteinthiols, and phytochelatins). The As also stimulated the phytochelatins biosynthesis, but this effect was limited, probably because plants exposed only to pollutant showed small increments in the sulfate uptake. Thus, NO also may be involved in gene regulation of sulfate carriers. Springer Science+Business Media Dordrecht, 2013 Antioxidants nationallicence Toxicity nationallicence Phytochelatins nationallicence Cellular Signaling nationallicence Sulfate Uptake nationallicence Farnese Fernanda Department of Plant Biology, Federal University of Viçosa, Viçosa, Brazil aut de Oliveira Juraci Department of General Biology, Federal University of Viçosa, 36570-000, Viçosa, Minas Gerais, Brazil aut Gusman Grasielle College of Pharmacy, Federal University of Minas Gerais, 31270-901, Belo Horizonte, Minas Gerais, Brazil aut Leão Gabriela Department of Plant Biology, Federal University of Viçosa, Viçosa, Brazil aut Ribeiro Cleberson Department of General Biology, Federal University of Viçosa, 36570-000, Viçosa, Minas Gerais, Brazil aut Siman Luhan Department of General Biology, Federal University of Viçosa, 36570-000, Viçosa, Minas Gerais, Brazil aut Cambraia José Department of General Biology, Federal University of Viçosa, 36570-000, Viçosa, Minas Gerais, Brazil aut Water, Air, & Soil Pollution Springer Netherlands 224/9(2013-09-01), 1-11 0049-6979 224:9<1 2013 224 11270 https://doi.org/10.1007/s11270-013-1660-8 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11270-013-1660-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Farnese Fernanda Department of Plant Biology, Federal University of Viçosa, Viçosa, Brazil aut NATIONALLICENCE 700 1- de Oliveira Juraci Department of General Biology, Federal University of Viçosa, 36570-000, Viçosa, Minas Gerais, Brazil aut NATIONALLICENCE 700 1- Gusman Grasielle College of Pharmacy, Federal University of Minas Gerais, 31270-901, Belo Horizonte, Minas Gerais, Brazil aut NATIONALLICENCE 700 1- Leão Gabriela Department of Plant Biology, Federal University of Viçosa, Viçosa, Brazil aut NATIONALLICENCE 700 1- Ribeiro Cleberson Department of General Biology, Federal University of Viçosa, 36570-000, Viçosa, Minas Gerais, Brazil aut NATIONALLICENCE 700 1- Siman Luhan Department of General Biology, Federal University of Viçosa, 36570-000, Viçosa, Minas Gerais, Brazil aut NATIONALLICENCE 700 1- Cambraia José Department of General Biology, Federal University of Viçosa, 36570-000, Viçosa, Minas Gerais, Brazil aut NATIONALLICENCE 773 0- Water, Air, & Soil Pollution Springer Netherlands 224/9(2013-09-01), 1-11 0049-6979 224:9<1 2013 224 11270 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer