Thresholds of copper toxicity to lettuce in field-collected agricultural soils exposed to copper mining activities in Chile

Several previous studies highlighted the importance of using field-collected soils instead of artificially spiked contaminated soils for phytotoxicity tests. However, the use of field-collected soils presents several difficulties for interpretation of results, due to presence of various contaminants...

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Autores principales:	Verdejo,J, Ginocchio,R, Sauvé,S, Mondaca,P, Neaman,A
Lenguaje:	English
Publicado:	Chilean Society of Soil Science / Sociedad Chilena de la Ciencia del Suelo 2016
Materias:	Bioavailability copper EC50 lettuce toxicity
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162016000100011
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spelling	oai:scielo:S0718-951620160001000112016-05-05Thresholds of copper toxicity to lettuce in field-collected agricultural soils exposed to copper mining activities in ChileVerdejo,JGinocchio,RSauvé,SMondaca,PNeaman,A Bioavailability copper EC50 lettuce toxicity Several previous studies highlighted the importance of using field-collected soils instead of artificially spiked contaminated soils for phytotoxicity tests. However, the use of field-collected soils presents several difficulties for interpretation of results, due to presence of various contaminants in the soil and unavoidable differences in the physicochemical properties of the tested soils. The objective of this study was to estimate thresholds of copper phytotoxicity in topsoils of 27 agricultural areas historically contaminated by mining activities in Chile. We performed standard emergence and early growth (21 days) tests (OECD 208 and ISO 11269-2) with lettuce. The response of lettuce was best explained by Cu toxicity and P deficiency. Growth of lettuce was related to soil total Cu concentration and Olsen-P and was not affected by soluble Cu (extractable by 0.1 M KNO3) or Cu2+ free ion activity of the soil solution. Thus, lettuce has a limited applicability for metal toxicity assessment in metal-contaminated soils, due to sensitivity of its response to P deficiency. However, it was possible to determine toxic thresholds for shoot concentrations of Cu in lettuce for responses of shoot and root length, suggesting that shoot concentrations of Cu in lettuce can be useful as indicators of Cu toxicity even in soils with a wide range of nutrient concentrations.info:eu-repo/semantics/openAccessChilean Society of Soil Science / Sociedad Chilena de la Ciencia del SueloJournal of soil science and plant nutrition v.16 n.1 20162016-03-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162016000100011en10.4067/S0718-95162016005000011
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Bioavailability copper EC50 lettuce toxicity
spellingShingle	Bioavailability copper EC50 lettuce toxicity Verdejo,J Ginocchio,R Sauvé,S Mondaca,P Neaman,A Thresholds of copper toxicity to lettuce in field-collected agricultural soils exposed to copper mining activities in Chile
description	Several previous studies highlighted the importance of using field-collected soils instead of artificially spiked contaminated soils for phytotoxicity tests. However, the use of field-collected soils presents several difficulties for interpretation of results, due to presence of various contaminants in the soil and unavoidable differences in the physicochemical properties of the tested soils. The objective of this study was to estimate thresholds of copper phytotoxicity in topsoils of 27 agricultural areas historically contaminated by mining activities in Chile. We performed standard emergence and early growth (21 days) tests (OECD 208 and ISO 11269-2) with lettuce. The response of lettuce was best explained by Cu toxicity and P deficiency. Growth of lettuce was related to soil total Cu concentration and Olsen-P and was not affected by soluble Cu (extractable by 0.1 M KNO3) or Cu2+ free ion activity of the soil solution. Thus, lettuce has a limited applicability for metal toxicity assessment in metal-contaminated soils, due to sensitivity of its response to P deficiency. However, it was possible to determine toxic thresholds for shoot concentrations of Cu in lettuce for responses of shoot and root length, suggesting that shoot concentrations of Cu in lettuce can be useful as indicators of Cu toxicity even in soils with a wide range of nutrient concentrations.
author	Verdejo,J Ginocchio,R Sauvé,S Mondaca,P Neaman,A
author_facet	Verdejo,J Ginocchio,R Sauvé,S Mondaca,P Neaman,A
author_sort	Verdejo,J
title	Thresholds of copper toxicity to lettuce in field-collected agricultural soils exposed to copper mining activities in Chile
title_short	Thresholds of copper toxicity to lettuce in field-collected agricultural soils exposed to copper mining activities in Chile
title_full	Thresholds of copper toxicity to lettuce in field-collected agricultural soils exposed to copper mining activities in Chile
title_fullStr	Thresholds of copper toxicity to lettuce in field-collected agricultural soils exposed to copper mining activities in Chile
title_full_unstemmed	Thresholds of copper toxicity to lettuce in field-collected agricultural soils exposed to copper mining activities in Chile
title_sort	thresholds of copper toxicity to lettuce in field-collected agricultural soils exposed to copper mining activities in chile
publisher	Chilean Society of Soil Science / Sociedad Chilena de la Ciencia del Suelo
publishDate	2016
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162016000100011
work_keys_str_mv	AT verdejoj thresholdsofcoppertoxicitytolettuceinfieldcollectedagriculturalsoilsexposedtocopperminingactivitiesinchile AT ginocchior thresholdsofcoppertoxicitytolettuceinfieldcollectedagriculturalsoilsexposedtocopperminingactivitiesinchile AT sauves thresholdsofcoppertoxicitytolettuceinfieldcollectedagriculturalsoilsexposedtocopperminingactivitiesinchile AT mondacap thresholdsofcoppertoxicitytolettuceinfieldcollectedagriculturalsoilsexposedtocopperminingactivitiesinchile AT neamana thresholdsofcoppertoxicitytolettuceinfieldcollectedagriculturalsoilsexposedtocopperminingactivitiesinchile
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Thresholds of copper toxicity to lettuce in field-collected agricultural soils exposed to copper mining activities in Chile

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