Nickel-tolerant ectomycorrhizal Pisolithus albus ultramafic ecotype isolated from nickel mines in New Caledonia strongly enhance growth of the host plant Eucalyptus globulus at toxic nickel concentrations
Ectomycorrhizal (ECM) Pisolithus albus (Cooke & Massee), belonging to the ultramafic ecotype isolated in nickel-rich serpentine soils from New Caledonia (a tropical hotspot of biodiversity) and showing in vitro adaptive nickel tolerance, were inoculated to Eucalyptus globulus Labill used as a Myrtaceae plant-host model to study ectomycorrhizal symbiosis. Plants were then exposed to a nickel (Ni) dose- response experiment with increased Ni treatments up to 60 mg kg?1 soil as extractable Ni content in serpentine soils. Results showed that plants inoculated with ultramafic ECM P. albus were able to tolerate high and toxic concentrations of Ni (up to 60 ?g g?1) while uninoculated controls were not. At the highest Ni concentration tested, root growth was more than 20-fold higher and shoot growth more than 30-fold higher in ECM plants compared with control plants. The improved growth in ECM plants was associated with a 2.4-fold reduction in root Ni concentration but a massive 60- fold reduction in transfer of Ni from root to shoots. In vitro, P. albus strains could withstand high Ni concentrations but accumulated very little Ni in its tissue. The lower Ni uptake by mycorrhizal plants could not be explained by increased release of metal-complexing chelates since these were 5- to 12-fold lower in mycorrhizal plants at high Ni concentrations. It is proposed that the fungal sheath covering the plant roots acts as an effective barrier to limit transfer of Ni from soil into the root tissue. The degree of tolerance conferred by the ultramafic P. albus isolates to growth of the host tree species is considerably greater than previously reported for other ECM. The primary mechanisms underlying this improved growth were identified as reduced Ni uptake into the roots and markedly reduced transfer from root to shoot in mycorrhizal plants. The fact that these positive responses were observed at Ni concentrations commonly observed in serpentinic soils suggests that ultramafic ecotypes of P. albus could play an important role in the adaptation of tree species to soils containing high concentrations of heavy metals and aid in strategies for ecological restoration.
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K10 - Production forestière P34 - Biologie du sol F62 - Physiologie végétale - Croissance et développement P35 - Fertilité du sol P36 - Érosion, conservation et récupération des sols Eucalyptus globulus Pisolithus symbiose Mycorhizé adaptation développement biologique écotype type de sol chimique tolérance nickel métal lourd http://aims.fao.org/aos/agrovoc/c_2692 http://aims.fao.org/aos/agrovoc/c_23961 http://aims.fao.org/aos/agrovoc/c_7563 http://aims.fao.org/aos/agrovoc/c_5023 http://aims.fao.org/aos/agrovoc/c_117 http://aims.fao.org/aos/agrovoc/c_921 http://aims.fao.org/aos/agrovoc/c_27505 http://aims.fao.org/aos/agrovoc/c_1519 http://aims.fao.org/aos/agrovoc/c_37740 http://aims.fao.org/aos/agrovoc/c_5172 http://aims.fao.org/aos/agrovoc/c_2223 http://aims.fao.org/aos/agrovoc/c_5155 http://aims.fao.org/aos/agrovoc/c_3081 K10 - Production forestière P34 - Biologie du sol F62 - Physiologie végétale - Croissance et développement P35 - Fertilité du sol P36 - Érosion, conservation et récupération des sols Eucalyptus globulus Pisolithus symbiose Mycorhizé adaptation développement biologique écotype type de sol chimique tolérance nickel métal lourd http://aims.fao.org/aos/agrovoc/c_2692 http://aims.fao.org/aos/agrovoc/c_23961 http://aims.fao.org/aos/agrovoc/c_7563 http://aims.fao.org/aos/agrovoc/c_5023 http://aims.fao.org/aos/agrovoc/c_117 http://aims.fao.org/aos/agrovoc/c_921 http://aims.fao.org/aos/agrovoc/c_27505 http://aims.fao.org/aos/agrovoc/c_1519 http://aims.fao.org/aos/agrovoc/c_37740 http://aims.fao.org/aos/agrovoc/c_5172 http://aims.fao.org/aos/agrovoc/c_2223 http://aims.fao.org/aos/agrovoc/c_5155 http://aims.fao.org/aos/agrovoc/c_3081 |
spellingShingle |
K10 - Production forestière P34 - Biologie du sol F62 - Physiologie végétale - Croissance et développement P35 - Fertilité du sol P36 - Érosion, conservation et récupération des sols Eucalyptus globulus Pisolithus symbiose Mycorhizé adaptation développement biologique écotype type de sol chimique tolérance nickel métal lourd http://aims.fao.org/aos/agrovoc/c_2692 http://aims.fao.org/aos/agrovoc/c_23961 http://aims.fao.org/aos/agrovoc/c_7563 http://aims.fao.org/aos/agrovoc/c_5023 http://aims.fao.org/aos/agrovoc/c_117 http://aims.fao.org/aos/agrovoc/c_921 http://aims.fao.org/aos/agrovoc/c_27505 http://aims.fao.org/aos/agrovoc/c_1519 http://aims.fao.org/aos/agrovoc/c_37740 http://aims.fao.org/aos/agrovoc/c_5172 http://aims.fao.org/aos/agrovoc/c_2223 http://aims.fao.org/aos/agrovoc/c_5155 http://aims.fao.org/aos/agrovoc/c_3081 K10 - Production forestière P34 - Biologie du sol F62 - Physiologie végétale - Croissance et développement P35 - Fertilité du sol P36 - Érosion, conservation et récupération des sols Eucalyptus globulus Pisolithus symbiose Mycorhizé adaptation développement biologique écotype type de sol chimique tolérance nickel métal lourd http://aims.fao.org/aos/agrovoc/c_2692 http://aims.fao.org/aos/agrovoc/c_23961 http://aims.fao.org/aos/agrovoc/c_7563 http://aims.fao.org/aos/agrovoc/c_5023 http://aims.fao.org/aos/agrovoc/c_117 http://aims.fao.org/aos/agrovoc/c_921 http://aims.fao.org/aos/agrovoc/c_27505 http://aims.fao.org/aos/agrovoc/c_1519 http://aims.fao.org/aos/agrovoc/c_37740 http://aims.fao.org/aos/agrovoc/c_5172 http://aims.fao.org/aos/agrovoc/c_2223 http://aims.fao.org/aos/agrovoc/c_5155 http://aims.fao.org/aos/agrovoc/c_3081 Jourand, Philippe Ducousso, Marc Reid, Robert Majorel, Clarisse Richert, Clément Riss, Jennifer Lebrun, Michel Nickel-tolerant ectomycorrhizal Pisolithus albus ultramafic ecotype isolated from nickel mines in New Caledonia strongly enhance growth of the host plant Eucalyptus globulus at toxic nickel concentrations |
description |
Ectomycorrhizal (ECM) Pisolithus albus (Cooke & Massee), belonging to the ultramafic ecotype isolated in nickel-rich serpentine soils from New Caledonia (a tropical hotspot of biodiversity) and showing in vitro adaptive nickel tolerance, were inoculated to Eucalyptus globulus Labill used as a Myrtaceae plant-host model to study ectomycorrhizal symbiosis. Plants were then exposed to a nickel (Ni) dose- response experiment with increased Ni treatments up to 60 mg kg?1 soil as extractable Ni content in serpentine soils. Results showed that plants inoculated with ultramafic ECM P. albus were able to tolerate high and toxic concentrations of Ni (up to 60 ?g g?1) while uninoculated controls were not. At the highest Ni concentration tested, root growth was more than 20-fold higher and shoot growth more than 30-fold higher in ECM plants compared with control plants. The improved growth in ECM plants was associated with a 2.4-fold reduction in root Ni concentration but a massive 60- fold reduction in transfer of Ni from root to shoots. In vitro, P. albus strains could withstand high Ni concentrations but accumulated very little Ni in its tissue. The lower Ni uptake by mycorrhizal plants could not be explained by increased release of metal-complexing chelates since these were 5- to 12-fold lower in mycorrhizal plants at high Ni concentrations. It is proposed that the fungal sheath covering the plant roots acts as an effective barrier to limit transfer of Ni from soil into the root tissue. The degree of tolerance conferred by the ultramafic P. albus isolates to growth of the host tree species is considerably greater than previously reported for other ECM. The primary mechanisms underlying this improved growth were identified as reduced Ni uptake into the roots and markedly reduced transfer from root to shoot in mycorrhizal plants. The fact that these positive responses were observed at Ni concentrations commonly observed in serpentinic soils suggests that ultramafic ecotypes of P. albus could play an important role in the adaptation of tree species to soils containing high concentrations of heavy metals and aid in strategies for ecological restoration. |
format |
article |
topic_facet |
K10 - Production forestière P34 - Biologie du sol F62 - Physiologie végétale - Croissance et développement P35 - Fertilité du sol P36 - Érosion, conservation et récupération des sols Eucalyptus globulus Pisolithus symbiose Mycorhizé adaptation développement biologique écotype type de sol chimique tolérance nickel métal lourd http://aims.fao.org/aos/agrovoc/c_2692 http://aims.fao.org/aos/agrovoc/c_23961 http://aims.fao.org/aos/agrovoc/c_7563 http://aims.fao.org/aos/agrovoc/c_5023 http://aims.fao.org/aos/agrovoc/c_117 http://aims.fao.org/aos/agrovoc/c_921 http://aims.fao.org/aos/agrovoc/c_27505 http://aims.fao.org/aos/agrovoc/c_1519 http://aims.fao.org/aos/agrovoc/c_37740 http://aims.fao.org/aos/agrovoc/c_5172 http://aims.fao.org/aos/agrovoc/c_2223 http://aims.fao.org/aos/agrovoc/c_5155 http://aims.fao.org/aos/agrovoc/c_3081 |
author |
Jourand, Philippe Ducousso, Marc Reid, Robert Majorel, Clarisse Richert, Clément Riss, Jennifer Lebrun, Michel |
author_facet |
Jourand, Philippe Ducousso, Marc Reid, Robert Majorel, Clarisse Richert, Clément Riss, Jennifer Lebrun, Michel |
author_sort |
Jourand, Philippe |
title |
Nickel-tolerant ectomycorrhizal Pisolithus albus ultramafic ecotype isolated from nickel mines in New Caledonia strongly enhance growth of the host plant Eucalyptus globulus at toxic nickel concentrations |
title_short |
Nickel-tolerant ectomycorrhizal Pisolithus albus ultramafic ecotype isolated from nickel mines in New Caledonia strongly enhance growth of the host plant Eucalyptus globulus at toxic nickel concentrations |
title_full |
Nickel-tolerant ectomycorrhizal Pisolithus albus ultramafic ecotype isolated from nickel mines in New Caledonia strongly enhance growth of the host plant Eucalyptus globulus at toxic nickel concentrations |
title_fullStr |
Nickel-tolerant ectomycorrhizal Pisolithus albus ultramafic ecotype isolated from nickel mines in New Caledonia strongly enhance growth of the host plant Eucalyptus globulus at toxic nickel concentrations |
title_full_unstemmed |
Nickel-tolerant ectomycorrhizal Pisolithus albus ultramafic ecotype isolated from nickel mines in New Caledonia strongly enhance growth of the host plant Eucalyptus globulus at toxic nickel concentrations |
title_sort |
nickel-tolerant ectomycorrhizal pisolithus albus ultramafic ecotype isolated from nickel mines in new caledonia strongly enhance growth of the host plant eucalyptus globulus at toxic nickel concentrations |
url |
http://agritrop.cirad.fr/557679/ http://agritrop.cirad.fr/557679/1/document_557679.pdf |
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dig-cirad-fr-5576792024-01-28T18:47:02Z http://agritrop.cirad.fr/557679/ http://agritrop.cirad.fr/557679/ Nickel-tolerant ectomycorrhizal Pisolithus albus ultramafic ecotype isolated from nickel mines in New Caledonia strongly enhance growth of the host plant Eucalyptus globulus at toxic nickel concentrations. Jourand Philippe, Ducousso Marc, Reid Robert, Majorel Clarisse, Richert Clément, Riss Jennifer, Lebrun Michel. 2010. Tree Physiology, 30 (10) : 1311-1319.https://doi.org/10.1093/treephys/tpq070 <https://doi.org/10.1093/treephys/tpq070> Nickel-tolerant ectomycorrhizal Pisolithus albus ultramafic ecotype isolated from nickel mines in New Caledonia strongly enhance growth of the host plant Eucalyptus globulus at toxic nickel concentrations Jourand, Philippe Ducousso, Marc Reid, Robert Majorel, Clarisse Richert, Clément Riss, Jennifer Lebrun, Michel eng 2010 Tree Physiology K10 - Production forestière P34 - Biologie du sol F62 - Physiologie végétale - Croissance et développement P35 - Fertilité du sol P36 - Érosion, conservation et récupération des sols Eucalyptus globulus Pisolithus symbiose Mycorhizé adaptation développement biologique écotype type de sol chimique tolérance nickel métal lourd http://aims.fao.org/aos/agrovoc/c_2692 http://aims.fao.org/aos/agrovoc/c_23961 http://aims.fao.org/aos/agrovoc/c_7563 http://aims.fao.org/aos/agrovoc/c_5023 http://aims.fao.org/aos/agrovoc/c_117 http://aims.fao.org/aos/agrovoc/c_921 http://aims.fao.org/aos/agrovoc/c_27505 http://aims.fao.org/aos/agrovoc/c_1519 http://aims.fao.org/aos/agrovoc/c_37740 http://aims.fao.org/aos/agrovoc/c_5172 http://aims.fao.org/aos/agrovoc/c_2223 Nouvelle-Calédonie France http://aims.fao.org/aos/agrovoc/c_5155 http://aims.fao.org/aos/agrovoc/c_3081 Ectomycorrhizal (ECM) Pisolithus albus (Cooke & Massee), belonging to the ultramafic ecotype isolated in nickel-rich serpentine soils from New Caledonia (a tropical hotspot of biodiversity) and showing in vitro adaptive nickel tolerance, were inoculated to Eucalyptus globulus Labill used as a Myrtaceae plant-host model to study ectomycorrhizal symbiosis. Plants were then exposed to a nickel (Ni) dose- response experiment with increased Ni treatments up to 60 mg kg?1 soil as extractable Ni content in serpentine soils. Results showed that plants inoculated with ultramafic ECM P. albus were able to tolerate high and toxic concentrations of Ni (up to 60 ?g g?1) while uninoculated controls were not. At the highest Ni concentration tested, root growth was more than 20-fold higher and shoot growth more than 30-fold higher in ECM plants compared with control plants. The improved growth in ECM plants was associated with a 2.4-fold reduction in root Ni concentration but a massive 60- fold reduction in transfer of Ni from root to shoots. In vitro, P. albus strains could withstand high Ni concentrations but accumulated very little Ni in its tissue. The lower Ni uptake by mycorrhizal plants could not be explained by increased release of metal-complexing chelates since these were 5- to 12-fold lower in mycorrhizal plants at high Ni concentrations. It is proposed that the fungal sheath covering the plant roots acts as an effective barrier to limit transfer of Ni from soil into the root tissue. The degree of tolerance conferred by the ultramafic P. albus isolates to growth of the host tree species is considerably greater than previously reported for other ECM. The primary mechanisms underlying this improved growth were identified as reduced Ni uptake into the roots and markedly reduced transfer from root to shoot in mycorrhizal plants. The fact that these positive responses were observed at Ni concentrations commonly observed in serpentinic soils suggests that ultramafic ecotypes of P. albus could play an important role in the adaptation of tree species to soils containing high concentrations of heavy metals and aid in strategies for ecological restoration. article info:eu-repo/semantics/article Journal Article info:eu-repo/semantics/publishedVersion http://agritrop.cirad.fr/557679/1/document_557679.pdf application/pdf Cirad license info:eu-repo/semantics/restrictedAccess https://agritrop.cirad.fr/mention_legale.html https://doi.org/10.1093/treephys/tpq070 10.1093/treephys/tpq070 info:eu-repo/semantics/altIdentifier/doi/10.1093/treephys/tpq070 info:eu-repo/semantics/altIdentifier/purl/https://doi.org/10.1093/treephys/tpq070 |