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Copper phytotoxicity affects root elongation and iron nutrition in durum wheat (Triticum turgidum durum L.)

This work investigated how copper (Cu) phytotoxicity affected iron (Fe) nutrition and root elongation in hydroponically grown durum wheat (Triticum turgidum durum L., cv Acalou) in order to establish the critical level of Cu concentration in roots above which significant Cu phytotoxicity occurs. Thi... Full description

Journal Title: Plant and soil 2008, Vol.310 (1/2), p.151-165
Main Author: Michaud, Aurélia M
Other Authors: Chappellaz, Carole , Hinsinger, Philippe
Format: Electronic Article Electronic Article
Language: English
Subjects:
Publisher: Dordrecht: Springer
ID: ISSN: 0032-079X
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recordid: cdi_hal_primary_oai_HAL_hal_02664279v1
title: Copper phytotoxicity affects root elongation and iron nutrition in durum wheat (Triticum turgidum durum L.)
format: Article
creator:
  • Michaud, Aurélia M
  • Chappellaz, Carole
  • Hinsinger, Philippe
subjects:
  • Acid soils
  • Agronomy. Soil science and plant productions
  • Animal, plant and microbial ecology
  • Biological and medical sciences
  • Biomedical and Life Sciences
  • Copper
  • Ecology
  • Fundamental and applied biological sciences. Psychology
  • Hydroponics
  • Hypochromic anemia
  • Iron
  • Life Sciences
  • Nutrient solutions
  • Phytotoxicity
  • Plant growth
  • Plant Physiology
  • Plant roots
  • Plant Sciences
  • Plants
  • Regular Article
  • Root growth
  • Roots of functions
  • Soil pollution
  • Soil Science & Conservation
  • Vegetal Biology
  • Wheat
ispartof: Plant and soil, 2008, Vol.310 (1/2), p.151-165
description: This work investigated how copper (Cu) phytotoxicity affected iron (Fe) nutrition and root elongation in hydroponically grown durum wheat (Triticum turgidum durum L., cv Acalou) in order to establish the critical level of Cu concentration in roots above which significant Cu phytotoxicity occurs. This was assessed at two levels of Fe supply (2 and 100 μM). Severe symptoms of Cu phytotoxicity were observed at Cu2+ concentration above 1 μM, i.e. interveinal chlorosis symptoms and global root growth alteration. Total root Cu concentration of about 100, 150 and 250–300 mg kg-1 corresponded to 10%, 25% and 50% reduction in root elongation, respectively. Copper and Fe concentrations as well as amounts of Cu and Fe accumulated in shoots varied inversely which suggested an antagonism between Cu and Fe leading to Fe deficiency. In addition, the root-induced release of complexing compounds increased significantly with increasing Cu concentration in nutrient solution and was positively correlated with Cu uptake without significant difference between the two Fe treatments (high and low Fe supply). This work suggests that total root Cu concentration might be a simple, sensitive indicator of Cu rhizotoxicity. It also indicated that Cu phytotoxicity which may have resulted in Fe deficiency and significant increase in root-induced release of complexing compounds (presumably phytosiderophores) was independent of the level of Fe supply provided that the threshold values of phytotoxicity were based on the free Cu-ion concentration.
language: eng
source:
identifier: ISSN: 0032-079X
fulltext: no_fulltext
issn:
  • 0032-079X
  • 1573-5036
url: Link


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titleCopper phytotoxicity affects root elongation and iron nutrition in durum wheat (Triticum turgidum durum L.)
creatorMichaud, Aurélia M ; Chappellaz, Carole ; Hinsinger, Philippe
creatorcontribMichaud, Aurélia M ; Chappellaz, Carole ; Hinsinger, Philippe
descriptionThis work investigated how copper (Cu) phytotoxicity affected iron (Fe) nutrition and root elongation in hydroponically grown durum wheat (Triticum turgidum durum L., cv Acalou) in order to establish the critical level of Cu concentration in roots above which significant Cu phytotoxicity occurs. This was assessed at two levels of Fe supply (2 and 100 μM). Severe symptoms of Cu phytotoxicity were observed at Cu2+ concentration above 1 μM, i.e. interveinal chlorosis symptoms and global root growth alteration. Total root Cu concentration of about 100, 150 and 250–300 mg kg-1 corresponded to 10%, 25% and 50% reduction in root elongation, respectively. Copper and Fe concentrations as well as amounts of Cu and Fe accumulated in shoots varied inversely which suggested an antagonism between Cu and Fe leading to Fe deficiency. In addition, the root-induced release of complexing compounds increased significantly with increasing Cu concentration in nutrient solution and was positively correlated with Cu uptake without significant difference between the two Fe treatments (high and low Fe supply). This work suggests that total root Cu concentration might be a simple, sensitive indicator of Cu rhizotoxicity. It also indicated that Cu phytotoxicity which may have resulted in Fe deficiency and significant increase in root-induced release of complexing compounds (presumably phytosiderophores) was independent of the level of Fe supply provided that the threshold values of phytotoxicity were based on the free Cu-ion concentration.
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subjectAcid soils ; Agronomy. Soil science and plant productions ; Animal, plant and microbial ecology ; Biological and medical sciences ; Biomedical and Life Sciences ; Copper ; Ecology ; Fundamental and applied biological sciences. Psychology ; Hydroponics ; Hypochromic anemia ; Iron ; Life Sciences ; Nutrient solutions ; Phytotoxicity ; Plant growth ; Plant Physiology ; Plant roots ; Plant Sciences ; Plants ; Regular Article ; Root growth ; Roots of functions ; Soil pollution ; Soil Science & Conservation ; Vegetal Biology ; Wheat
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descriptionThis work investigated how copper (Cu) phytotoxicity affected iron (Fe) nutrition and root elongation in hydroponically grown durum wheat (Triticum turgidum durum L., cv Acalou) in order to establish the critical level of Cu concentration in roots above which significant Cu phytotoxicity occurs. This was assessed at two levels of Fe supply (2 and 100 μM). Severe symptoms of Cu phytotoxicity were observed at Cu2+ concentration above 1 μM, i.e. interveinal chlorosis symptoms and global root growth alteration. Total root Cu concentration of about 100, 150 and 250–300 mg kg-1 corresponded to 10%, 25% and 50% reduction in root elongation, respectively. Copper and Fe concentrations as well as amounts of Cu and Fe accumulated in shoots varied inversely which suggested an antagonism between Cu and Fe leading to Fe deficiency. In addition, the root-induced release of complexing compounds increased significantly with increasing Cu concentration in nutrient solution and was positively correlated with Cu uptake without significant difference between the two Fe treatments (high and low Fe supply). This work suggests that total root Cu concentration might be a simple, sensitive indicator of Cu rhizotoxicity. It also indicated that Cu phytotoxicity which may have resulted in Fe deficiency and significant increase in root-induced release of complexing compounds (presumably phytosiderophores) was independent of the level of Fe supply provided that the threshold values of phytotoxicity were based on the free Cu-ion concentration.
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titleCopper phytotoxicity affects root elongation and iron nutrition in durum wheat (Triticum turgidum durum L.)
authorMichaud, Aurélia M ; Chappellaz, Carole ; Hinsinger, Philippe
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abstractThis work investigated how copper (Cu) phytotoxicity affected iron (Fe) nutrition and root elongation in hydroponically grown durum wheat (Triticum turgidum durum L., cv Acalou) in order to establish the critical level of Cu concentration in roots above which significant Cu phytotoxicity occurs. This was assessed at two levels of Fe supply (2 and 100 μM). Severe symptoms of Cu phytotoxicity were observed at Cu2+ concentration above 1 μM, i.e. interveinal chlorosis symptoms and global root growth alteration. Total root Cu concentration of about 100, 150 and 250–300 mg kg-1 corresponded to 10%, 25% and 50% reduction in root elongation, respectively. Copper and Fe concentrations as well as amounts of Cu and Fe accumulated in shoots varied inversely which suggested an antagonism between Cu and Fe leading to Fe deficiency. In addition, the root-induced release of complexing compounds increased significantly with increasing Cu concentration in nutrient solution and was positively correlated with Cu uptake without significant difference between the two Fe treatments (high and low Fe supply). This work suggests that total root Cu concentration might be a simple, sensitive indicator of Cu rhizotoxicity. It also indicated that Cu phytotoxicity which may have resulted in Fe deficiency and significant increase in root-induced release of complexing compounds (presumably phytosiderophores) was independent of the level of Fe supply provided that the threshold values of phytotoxicity were based on the free Cu-ion concentration.
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