Effects of high arsenic and fluoride soil concentrations on soybean plants
Arsenic [As] and Fluoride [F] are present in many soils, affecting crops and posing risks in the food chain. We performed pot experiments on spiked soils enriched in these elements either individually or simultaneously, over a wide range of concentrations. Soybean biomass production, grain yield, As and F accumulation and distribution within the plant, and the antioxidant response to these stresses were analyzed. Arsenic was more toxic than F. At As levels mayor 35 mg-kg and F levels mayor 375 mg-kg, yield loss reached 60 per cent and 30 per cent, respectively. At the highest dose of As plants died within 2 weeks, whereas F showed no lethality. When they were applied simultaneously, detrimental effects were more important. As and F in plants increased in all soybean organs although grains presented the lowest concentrations. Antioxidant enzymes were enhanced in plants but this increase was not high enough to cope with the oxidative damage.
| Main Authors: | , , |
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| Format: | Texto biblioteca |
| Language: | eng |
| Subjects: | SOIL CONTAMINATION, TOXIC ELEMENTS IN CROPS, GRAIN CONTAMINATION, OXIDATIVE STRESS, SOYBEAN, CONTAMINACION DE SUELOS, ELEMENTOS TOXICOS EN CULTIVOS, CONTAMINACION DE GRANOS, ETRES OXIDATIVO, SOJA, , |
| Online Access: | http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=47296 http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber= |
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| Summary: | Arsenic [As] and Fluoride [F] are present in many soils, affecting crops and posing risks in the food chain. We performed pot experiments on spiked soils enriched in these elements either individually or simultaneously, over a wide range of concentrations. Soybean biomass production, grain yield, As and F accumulation and distribution within the plant, and the antioxidant response to these stresses were analyzed. Arsenic was more toxic than F. At As levels mayor 35 mg-kg and F levels mayor 375 mg-kg, yield loss reached 60 per cent and 30 per cent, respectively. At the highest dose of As plants died within 2 weeks, whereas F showed no lethality. When they were applied simultaneously, detrimental effects were more important. As and F in plants increased in all soybean organs although grains presented the lowest concentrations. Antioxidant enzymes were enhanced in plants but this increase was not high enough to cope with the oxidative damage. |
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