Implication of citrate, malate and histidine in the accumulation and transport of nickel in Mesembryanthemum crystallinum and Brassica juncea.
Identifieur interne : 000023 ( Main/Exploration ); précédent : 000022; suivant : 000024Implication of citrate, malate and histidine in the accumulation and transport of nickel in Mesembryanthemum crystallinum and Brassica juncea.
Auteurs : Taoufik Amari [Tunisie] ; Stanley Lutts [Belgique] ; Manel Taamali [Tunisie] ; Giorgio Lucchini [Italie] ; Gian Attilio Sacchi [Italie] ; Chedly Abdelly [Tunisie] ; Tahar Ghnaya [Tunisie]Source :
- Ecotoxicology and environmental safety [ 1090-2414 ] ; 2016.
English descriptors
- KwdEn :
- MESH :
- chemical , metabolism : Citric Acid, Histidine, Malates.
- metabolism : Mesembryanthemum, Mustard Plant, Plant Roots, Plant Shoots.
- chemical , pharmacokinetics : Nickel.
- physiology : Biological Transport.
- Salt-Tolerant Plants, Xylem.
Abstract
Citrate, malate and histidine have been involved in many processes including metal tolerance and accumulation in plants. These molecules have been frequently reported to be the potential nickel chelators, which most likely facilitate metal transport through xylem. In this context, we assess here, the relationship between organics acids and histidine content and nickel accumulation in Mesembryanthemum crystallinum and Brassica juncea grown in hydroponic media added with 25, 50 and 100 µM NiCl2. Results showed that M. crystallinum is relatively more tolerant to Ni toxicity than B. juncea. For both species, xylem transport rate of Ni increased with increasing Ni supply. A positive correlation was established between nickel and citrate concentrations in the xylem sap. In the shoot of B. juncea, citric and malic acids concentrations were significantly higher than in the shoot of M. crystallinum. Also, the shoots and roots of B. juncea accumulated much more histidine. In contrast, a higher root citrate concentration was observed in M. crystallinum. These findings suggest a specific involvement of malic and citric acid in Ni translocation and accumulation in M. crystallinum and B. juncea. The high citrate and histidine accumulation especially at 100µM NiCl2, in the roots of M. crystallinum might be among the important factors associated with the tolerance of this halophyte to toxic Ni levels.
DOI: 10.1016/j.ecoenv.2015.12.029
PubMed: 26745003
Affiliations:
- Belgique, Italie, Tunisie
- Lombardie, Vienne (Autriche)
- Milan, Vienne (Autriche)
- Université catholique de Louvain
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Le document en format XML
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Hammam-lif</wicri:regionArea><wicri:noRegion>2050 Hammam-lif</wicri:noRegion></affiliation></author></analytic><series><title level="j">Ecotoxicology and environmental safety</title><idno type="eISSN">1090-2414</idno><imprint><date when="2016" type="published">2016</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Biological Transport (physiology)</term><term>Citric Acid (metabolism)</term><term>Histidine (metabolism)</term><term>Malates (metabolism)</term><term>Mesembryanthemum (metabolism)</term><term>Mustard Plant (metabolism)</term><term>Nickel (pharmacokinetics)</term><term>Plant Roots (metabolism)</term><term>Plant Shoots (metabolism)</term><term>Salt-Tolerant Plants</term><term>Xylem</term></keywords><keywords scheme="MESH" type="chemical" qualifier="metabolism" xml:lang="en"><term>Citric Acid</term><term>Histidine</term><term>Malates</term></keywords><keywords scheme="MESH" qualifier="metabolism" xml:lang="en"><term>Mesembryanthemum</term><term>Mustard Plant</term><term>Plant Roots</term><term>Plant Shoots</term></keywords><keywords scheme="MESH" type="chemical" qualifier="pharmacokinetics" xml:lang="en"><term>Nickel</term></keywords><keywords scheme="MESH" qualifier="physiology" xml:lang="en"><term>Biological Transport</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Salt-Tolerant Plants</term><term>Xylem</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Citrate, malate and histidine have been involved in many processes including metal tolerance and accumulation in plants. These molecules have been frequently reported to be the potential nickel chelators, which most likely facilitate metal transport through xylem. In this context, we assess here, the relationship between organics acids and histidine content and nickel accumulation in Mesembryanthemum crystallinum and Brassica juncea grown in hydroponic media added with 25, 50 and 100 µM NiCl2. Results showed that M. crystallinum is relatively more tolerant to Ni toxicity than B. juncea. For both species, xylem transport rate of Ni increased with increasing Ni supply. A positive correlation was established between nickel and citrate concentrations in the xylem sap. In the shoot of B. juncea, citric and malic acids concentrations were significantly higher than in the shoot of M. crystallinum. Also, the shoots and roots of B. juncea accumulated much more histidine. In contrast, a higher root citrate concentration was observed in M. crystallinum. These findings suggest a specific involvement of malic and citric acid in Ni translocation and accumulation in M. crystallinum and B. juncea. The high citrate and histidine accumulation especially at 100µM NiCl2, in the roots of M. crystallinum might be among the important factors associated with the tolerance of this halophyte to toxic Ni levels.</div></front></TEI><affiliations><list><country><li>Belgique</li><li>Italie</li><li>Tunisie</li></country><region><li>Lombardie</li><li>Vienne (Autriche)</li></region><settlement><li>Milan</li><li>Vienne (Autriche)</li></settlement><orgName><li>Université catholique de Louvain</li></orgName></list><tree><country name="Tunisie"><noRegion><name sortKey="Amari, Taoufik" sort="Amari, Taoufik" uniqKey="Amari T" first="Taoufik" last="Amari">Taoufik Amari</name></noRegion><name sortKey="Abdelly, Chedly" sort="Abdelly, Chedly" uniqKey="Abdelly C" first="Chedly" last="Abdelly">Chedly Abdelly</name><name sortKey="Ghnaya, Tahar" sort="Ghnaya, Tahar" uniqKey="Ghnaya T" first="Tahar" last="Ghnaya">Tahar Ghnaya</name><name sortKey="Taamali, Manel" sort="Taamali, Manel" uniqKey="Taamali M" first="Manel" last="Taamali">Manel Taamali</name></country><country name="Belgique"><region name="Vienne (Autriche)"><name sortKey="Lutts, Stanley" sort="Lutts, Stanley" uniqKey="Lutts S" first="Stanley" last="Lutts">Stanley Lutts</name></region></country><country name="Italie"><region name="Lombardie"><name sortKey="Lucchini, Giorgio" sort="Lucchini, Giorgio" uniqKey="Lucchini G" first="Giorgio" last="Lucchini">Giorgio Lucchini</name></region><name sortKey="Sacchi, Gian Attilio" sort="Sacchi, Gian Attilio" uniqKey="Sacchi G" first="Gian Attilio" last="Sacchi">Gian Attilio Sacchi</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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