Nickel tolerance, accumulation and subcellular distribution in the halophytes Sesuvium portulacastrum and Cakile maritima.
Identifieur interne : 000018 ( Main/Exploration ); précédent : 000017; suivant : 000019Nickel tolerance, accumulation and subcellular distribution in the halophytes Sesuvium portulacastrum and Cakile maritima.
Auteurs : Emna Fourati [Slovénie] ; Mariem Wali [Tunisie] ; Katarina Vogel-Mikuš [Slovénie] ; Chedly Abdelly [Tunisie] ; Tahar Ghnaya [Tunisie]Source :
- Plant physiology and biochemistry : PPB [ 1873-2690 ] ; 2016.
Abstract
It has been shown that halophytes are able to successfully cope with heavy metal toxicity, suggesting their possible use for remediation of metal contaminated soils. In this work, Ni tolerance and accumulation in two halophytes, Sesuvium portulacastrum (L.) L. and Cakile maritima Scop. was investigated. Seedlings of both species were subjected hydroponically during 21 days to 0, 25, 50, and 100 μM of NiCl2. The growth and photosynthesis parameters revealed that S. portulacastrum tolerates Ni better than C. maritima. The photosynthesis activity, chlorophyll content and photosystem II integrity were less impacted in Ni-treated S. portulacastrum as compared to C. maritima, although, Ni accumulated in higher concentrations in the shoots of S. portulacastrum (1050 μg g(-1) DW) than in those of C. maritima (550 μg g(-1) DW). The subcellular fractionation of Ni in the shoots of both species showed that C. maritima accumulated about 65% of Ni in the soluble fraction, while 28% was associated with the cell walls. In S. portulacastrum 44% of the total cellular Ni was seen in the soluble fraction and 43% was bound to the cell walls. It can be concluded that S. portulacastrum tolerates Ni better than C. maritima, most probably due to a better ability to sequester Ni in the cell walls, restricting its accumulation in the soluble fraction.
DOI: 10.1016/j.plaphy.2016.07.024
PubMed: 27479784
Affiliations:
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Centre de Biotechnologie de Borj Cedria (LR15CBBC02), Laboratoire des Plantes Extrèmophiles, BP 901, 2050 Hammam-Lif, Tunisia; Department of Biology, Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, SI-1000 Ljubljana, Slovenia.</nlm:affiliation><country xml:lang="fr">Slovénie</country><wicri:regionArea>Université de Tunis El Manar, BP 901, 2050 Hammam-Lif, Tunisia; Centre de Biotechnologie de Borj Cedria (LR15CBBC02), Laboratoire des Plantes Extrèmophiles, BP 901, 2050 Hammam-Lif, Tunisia; Department of Biology, Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, SI-1000 Ljubljana</wicri:regionArea><orgName type="university">Université de Tunis - El Manar</orgName><placeName><settlement type="city">Tunis</settlement><region type="region" nuts="2">Gouvernorat de Tunis</region></placeName></affiliation></author><author><name sortKey="Wali, Mariem" sort="Wali, Mariem" uniqKey="Wali M" first="Mariem" last="Wali">Mariem Wali</name><affiliation wicri:level="4"><nlm:affiliation>Université de Tunis El Manar, BP 901, 2050 Hammam-Lif, Tunisia; 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Electronic address: Tahar.ghnaya@gmail.com.</nlm:affiliation><country xml:lang="fr">Tunisie</country><wicri:regionArea>Centre de Biotechnologie de Borj Cedria (LR15CBBC02), Laboratoire des Plantes Extrèmophiles, BP 901, 2050 Hammam-Lif</wicri:regionArea><wicri:noRegion>2050 Hammam-Lif</wicri:noRegion></affiliation></author></analytic><series><title level="j">Plant physiology and biochemistry : PPB</title><idno type="eISSN">1873-2690</idno><imprint><date when="2016" type="published">2016</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">It has been shown that halophytes are able to successfully cope with heavy metal toxicity, suggesting their possible use for remediation of metal contaminated soils. In this work, Ni tolerance and accumulation in two halophytes, Sesuvium portulacastrum (L.) L. and Cakile maritima Scop. was investigated. Seedlings of both species were subjected hydroponically during 21 days to 0, 25, 50, and 100 μM of NiCl2. The growth and photosynthesis parameters revealed that S. portulacastrum tolerates Ni better than C. maritima. The photosynthesis activity, chlorophyll content and photosystem II integrity were less impacted in Ni-treated S. portulacastrum as compared to C. maritima, although, Ni accumulated in higher concentrations in the shoots of S. portulacastrum (1050 μg g(-1) DW) than in those of C. maritima (550 μg g(-1) DW). The subcellular fractionation of Ni in the shoots of both species showed that C. maritima accumulated about 65% of Ni in the soluble fraction, while 28% was associated with the cell walls. In S. portulacastrum 44% of the total cellular Ni was seen in the soluble fraction and 43% was bound to the cell walls. It can be concluded that S. portulacastrum tolerates Ni better than C. maritima, most probably due to a better ability to sequester Ni in the cell walls, restricting its accumulation in the soluble fraction.</div></front></TEI><affiliations><list><country><li>Slovénie</li><li>Tunisie</li></country><region><li>Gouvernorat de Tunis</li></region><settlement><li>Tunis</li></settlement><orgName><li>Université de Tunis - El Manar</li></orgName></list><tree><country name="Slovénie"><region name="Gouvernorat de Tunis"><name sortKey="Fourati, Emna" sort="Fourati, Emna" uniqKey="Fourati E" first="Emna" last="Fourati">Emna Fourati</name></region><name sortKey="Vogel Mikus, Katarina" sort="Vogel Mikus, Katarina" uniqKey="Vogel Mikus K" first="Katarina" last="Vogel-Mikuš">Katarina Vogel-Mikuš</name></country><country name="Tunisie"><region name="Gouvernorat de Tunis"><name sortKey="Wali, Mariem" sort="Wali, Mariem" uniqKey="Wali M" first="Mariem" last="Wali">Mariem Wali</name></region><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></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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