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Aymen S, Morena G, Vincenzo L, Laura P, Lorenza B, Abderrazak S, Chedly A, Karim BH. Salt tolerance of the halophyte Limonium delicatulum is more associated with antioxidant enzyme activities than phenolic compounds. Funct Plant Biol 2016; 43:607-619. [PMID: 32480490 DOI: 10.1071/fp15284] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2015] [Accepted: 03/06/2016] [Indexed: 05/25/2023]
Abstract
In this work we studied the effect of salinity (ranging from 50 to 500mM NaCl) on the physiological and the antioxidant responses of the local halophyte Limonium delicatulum Kuntze. We based our analysis on 12 biochemical assays that are commonly used to measure the antioxidant responses under stress such as oxidative stress markers, enzymes activities and polyphenolic compounds. Our aim was to study parameters that are strongly correlated with the growth response to salinity. Results showed two different growth responses depending on the concentration of NaCl in the medium. Under 50 to 200mM, the growth was stimulated before it decreased significantly at 300-500mM. L. delicatulum revealed a good aptitude to maintain photosynthetic machinery by increasing the concentrations of photosynthetic pigments, which is essential for the stabilisation of photosystems and the photosynthesis process under optimal NaCl concentration. Their breakdown at higher salinity decreased the photosynthetic performance of plants resulting in growth inhibition. Moreover, to reduce the damaging effect of oxidative stress and to tolerate the accumulation of salt ions, L. delicatulum induced the activities of their antioxidant enzymes more than their contents in polyphenolic compounds.
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Affiliation(s)
- Souid Aymen
- Laboratoire des Plantes Extrêmophiles, Centre de Biotechnologie de Borj Cedria, BP 901, Hammam Lif 2050, Tunisia
| | - Gabriele Morena
- National Research Council, Institute of Biology and Agricultural Biotechnology (IBBA), Pisa Unit, Research Area of Pisa, Via Moruzzi 1, 56124 Pisa, Italy
| | - Longo Vincenzo
- National Research Council, Institute of Biology and Agricultural Biotechnology (IBBA), Pisa Unit, Research Area of Pisa, Via Moruzzi 1, 56124 Pisa, Italy
| | - Pucci Laura
- National Research Council, Institute of Biology and Agricultural Biotechnology (IBBA), Pisa Unit, Research Area of Pisa, Via Moruzzi 1, 56124 Pisa, Italy
| | - Bellani Lorenza
- National Research Council, Institute of Biology and Agricultural Biotechnology (IBBA), Pisa Unit, Research Area of Pisa, Via Moruzzi 1, 56124 Pisa, Italy
| | - Smaoui Abderrazak
- Laboratoire des Plantes Extrêmophiles, Centre de Biotechnologie de Borj Cedria, BP 901, Hammam Lif 2050, Tunisia
| | - Abdelly Chedly
- Laboratoire des Plantes Extrêmophiles, Centre de Biotechnologie de Borj Cedria, BP 901, Hammam Lif 2050, Tunisia
| | - Ben Hamed Karim
- Laboratoire des Plantes Extrêmophiles, Centre de Biotechnologie de Borj Cedria, BP 901, Hammam Lif 2050, Tunisia
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Zouhaier B, Mariem M, Mokded R, Rouached A, Alsane K, Chedly A, Abderrazek S, Abdallah A. Physiological and biochemical responses of the forage legume Trifolium alexandrinum to different saline conditions and nitrogen levels. J Plant Res 2016; 129:423-34. [PMID: 26818949 DOI: 10.1007/s10265-016-0791-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2015] [Accepted: 11/05/2015] [Indexed: 05/18/2023]
Abstract
Salinity stress reduces plant productivity, but low levels of salinity often increase plant growth rates in some species. We herein describe the effects of salinity on plant growth while focusing on nitrogen use. We treated Trifolium alexandrinum with two nitrogen concentrations and salinity levels and determined growth rates, mineral concentrations, nitrogen use efficiency, photosynthesis rates, and nitrate reductase (NR, E.C. 1.6.6.1) and glutamine synthetase (GS, EC 6.3.1.2) activities. The T. alexandrinum growth rate increased following treatment with 100 mM NaCl in low nitrogen (LN) and high nitrogen (HN) conditions. Salt treatment also increased root volume, intrinsic water use efficiency, and nitrogen use efficiency in LN and HN conditions. These changes likely contributed to higher biomass production. Salinity also increased accumulations of sodium, chloride, and phosphate, but decreased potassium and calcium levels and total nitrogen concentrations in all plant organs independently of the available nitrogen level. However, the effect of salt treatment on magnesium and nitrate concentrations in photosynthetic organs depended on nitrogen levels. Salt treatment reduced photosynthesis rates in LN and HN conditions because of inhibited stomatal conductance. The effects of salinity on leaf NR and GS activities depended on nitrogen levels, with activities increasing in LN conditions. In saline conditions, LN availability resulted in optimal growth because of low chloride accumulation and increases in total nitrogen concentrations, nitrogen use efficiency, and NR and GS activities in photosynthetic organs. Therefore, T. alexandrinum is a legume forage crop that can be cultivated in low-saline soils where nitrogen availability is limited.
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Affiliation(s)
- Barhoumi Zouhaier
- Laboratoire des Plantes Extrêmophiles, Centre de Biotechnologie de Borj-Cedria, Université de Tunis El Manar, B.P. 901, Hammam-Lif, 2050, Tunisia.
- Biology Department, King Khalid University, P.O. Box 9004, Abha, 61413, Kingdom of Saudi Arabia.
| | - Maatallah Mariem
- Laboratoire des Plantes Extrêmophiles, Centre de Biotechnologie de Borj-Cedria, Université de Tunis El Manar, B.P. 901, Hammam-Lif, 2050, Tunisia
| | - Rabhi Mokded
- Laboratoire des Plantes Extrêmophiles, Centre de Biotechnologie de Borj-Cedria, Université de Tunis El Manar, B.P. 901, Hammam-Lif, 2050, Tunisia
| | - Aida Rouached
- Laboratoire des Plantes Extrêmophiles, Centre de Biotechnologie de Borj-Cedria, Université de Tunis El Manar, B.P. 901, Hammam-Lif, 2050, Tunisia
| | - Khaldoun Alsane
- Biology Department, King Khalid University, P.O. Box 9004, Abha, 61413, Kingdom of Saudi Arabia
| | - Abdelly Chedly
- Laboratoire des Plantes Extrêmophiles, Centre de Biotechnologie de Borj-Cedria, Université de Tunis El Manar, B.P. 901, Hammam-Lif, 2050, Tunisia
| | - Smaoui Abderrazek
- Laboratoire des Plantes Extrêmophiles, Centre de Biotechnologie de Borj-Cedria, Université de Tunis El Manar, B.P. 901, Hammam-Lif, 2050, Tunisia
| | - Atia Abdallah
- Laboratoire des Plantes Extrêmophiles, Centre de Biotechnologie de Borj-Cedria, Université de Tunis El Manar, B.P. 901, Hammam-Lif, 2050, Tunisia
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Zouhaier B, Abdallah A, Najla T, Wahbi D, Wided C, Aouatef BA, Chedly A, Abderazzak S. Scanning and transmission electron microscopy and X-ray analysisof leaf salt glands of Limoniastrum guyonianum Boiss. under NaCl salinity. Micron 2015; 78:1-9. [PMID: 26102605 DOI: 10.1016/j.micron.2015.06.001] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2015] [Revised: 06/04/2015] [Accepted: 06/04/2015] [Indexed: 11/28/2022]
Abstract
Leaf salt glands of Limoniastrum guyonianum were examined by scanning and transmission electron microscopes and energy dispersive X-ray analysis (EDAX) system, after growing for three months on sandy soil with or without 300 mM NaCl. Results showed that salt glands were irregularly scattered on both leaf sides and sunk under the epidermal level. Salt excretion occurred in both conditions and is mainly composed of calcium and magnesium in control plants, and essentially sodium and chloride in plants subjected to salt treatment. A salt gland is comprised of collecting, accumulating, and central compartments, and is made up of total thirty-two cells. The collecting cells were characterized by large central vacuoles. Accumulating cells contain numerous, large, and unshaped vacuoles and rudimentary chloroplasts. The central compartment was comprised of four basal cells and each one is surmounted by an apical cell. The basal cells are granulated, containing large nucleus, numerous mitochondria, endoplasmic reticulum, ribosomes, polyribosomes, and small vacuoles or vesicles. Equally, the apical cells are rich in organelles. Application of 300 mM NaCl to the culture medium increased vacuoles number and size, and organelles density especially the mitochondria which suggests energy requirement for ions transport. The reduction in size and number of vacuoles toward the interior of salt glands of treated plants and the fusion of the smallest ones with the plasma membrane substantiate the implication of such vacuoles in salt excretion process. The current study which is the first report on L. guyonianum salt gland has provided an in-depth understanding on structure-function relationship in the multicellular salt glands.
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Affiliation(s)
- Barhoumi Zouhaier
- Laboratoire des Plantes Extrêmophiles, Centre de Biotechnologie de Borj-Cedria, Université de Tunis El Manar, B.P. 901, Hammam-Lif 2050, Tunisia; King Khalid University, Biology Department, P.O. Box 9004, Abha 61413, Saudi Arabia.
| | - Atia Abdallah
- Laboratoire des Plantes Extrêmophiles, Centre de Biotechnologie de Borj-Cedria, Université de Tunis El Manar, B.P. 901, Hammam-Lif 2050, Tunisia
| | - Trabelsi Najla
- Laboratoire des Plantes Extrêmophiles, Centre de Biotechnologie de Borj-Cedria, Université de Tunis El Manar, B.P. 901, Hammam-Lif 2050, Tunisia
| | - Djebali Wahbi
- Laboratoire des Plantes Extrêmophiles, Centre de Biotechnologie de Borj-Cedria, Université de Tunis El Manar, B.P. 901, Hammam-Lif 2050, Tunisia
| | - Chaïbi Wided
- Unité de Recherche de Biologie et Physiologie Cellulaires Végétales, Département de Biologie, Faculté des Sciences de Tunis, Campus Universitaire, 1060 Tunis, Tunisia
| | - Ben Ammar Aouatef
- Unité de Microscopie Electronique, Faculté de Médecine de Tunis, Avenue Mohamed Karoui, 4002 Tunis, Tunisia
| | - Abdelly Chedly
- Laboratoire des Plantes Extrêmophiles, Centre de Biotechnologie de Borj-Cedria, Université de Tunis El Manar, B.P. 901, Hammam-Lif 2050, Tunisia
| | - Smaoui Abderazzak
- Laboratoire des Plantes Extrêmophiles, Centre de Biotechnologie de Borj-Cedria, Université de Tunis El Manar, B.P. 901, Hammam-Lif 2050, Tunisia
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Mariem W, Kilani BR, Benet G, Abdelbasset L, Stanley L, Charlotte P, Chedly A, Tahar G. How does NaCl improve tolerance to cadmium in the halophyte Sesuvium portulacastrum? Chemosphere 2014; 117:243-50. [PMID: 25104648 DOI: 10.1016/j.chemosphere.2014.07.041] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2014] [Revised: 07/14/2014] [Accepted: 07/15/2014] [Indexed: 05/27/2023]
Abstract
Sesuvium portulacastrum is a halophyte with considerable Cd tolerance and accumulation, especially under high salinity. The species seems a good candidate for phytoremediation of Cd-contaminated, saline soils. However, the mechanisms sustaining salt-induced alleviation of Cd toxicity remain unknown. Seedlings of S. portulacastrum were submitted hydroponically to different Cd concentrations (0, 25 and 50 μM Cd) in combination with low (0.09 mM), or high (200 mM) NaCl. Cadmium distribution within leaves and stems was assessed by total Cd, cell sap Cd, and Cd in different cell fractions. In plants with low salt supply (LS) Cd induced severe toxicity. The presence of 200 mM NaCl (HS) significantly alleviated Cd toxicity symptoms. HS drastically reduced both Cd-induced H2O2 production and membrane damage. In HS plants the reduced Cd uptake was only in part responsible for the lower Cd toxicity. Even at equal internal leaf Cd concentrations less Cd toxicity was observed in HS than in LS plants. In HS plants proportionally more Cd was bound in cell walls and proportionally less accumulated in the soluble fraction than in LS plants. Our results show that NaCl improves plant performance under Cd stress by both a decrease of Cd(2+) activity in the medium leading to less Cd uptake and a change of Cd speciation and compartmentation inside tissues. More efficient internal detoxification seems mainly brought about by preferential Cd binding to chloride and cell walls in plants treated with a high salt concentration.
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Affiliation(s)
- Wali Mariem
- Laboratoire des Plantes Extremophiles (LPE), Centre de Biotechnologies de la Technopole de Borj Cedria, BP 901, Hammam Lif 2050, Tunisia; Departamento de Fisiologia Vegetal, Facultad de Ciencias, Universidad Autonoma de Barcelona, E-08193 Bellaterra, Spain
| | - Ben Rjab Kilani
- Laboratoire des Plantes Extremophiles (LPE), Centre de Biotechnologies de la Technopole de Borj Cedria, BP 901, Hammam Lif 2050, Tunisia
| | - Gunsé Benet
- Departamento de Fisiologia Vegetal, Facultad de Ciencias, Universidad Autonoma de Barcelona, E-08193 Bellaterra, Spain
| | - Lakdhar Abdelbasset
- Laboratoire des Plantes Extremophiles (LPE), Centre de Biotechnologies de la Technopole de Borj Cedria, BP 901, Hammam Lif 2050, Tunisia
| | - Lutts Stanley
- Groupe de Recherche en Physiologie Végétale (GRPV), Earth and Life Institute, Université Catholique de Louvain, Louvain-la-Neuve, Belgium
| | - Poschenrieder Charlotte
- Departamento de Fisiologia Vegetal, Facultad de Ciencias, Universidad Autonoma de Barcelona, E-08193 Bellaterra, Spain
| | - Abdelly Chedly
- Laboratoire des Plantes Extremophiles (LPE), Centre de Biotechnologies de la Technopole de Borj Cedria, BP 901, Hammam Lif 2050, Tunisia
| | - Ghnaya Tahar
- Laboratoire des Plantes Extremophiles (LPE), Centre de Biotechnologies de la Technopole de Borj Cedria, BP 901, Hammam Lif 2050, Tunisia.
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Amel R, Hanen F, Ferid L, Riadh K, Chedly A, Aly R. Upshot of the ripening time on biological activities, phenol content and fatty acid composition of Tunisian Opuntia ficus-indica fruit. ACTA ACUST UNITED AC 2013. [DOI: 10.5897/ajb12.612] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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Ouni Y, Lakhdar A, Rabhi M, Smaoui A, Maria AR, Chedly A. Effects of the halophytes Tecticornia indica and Suaeda fruticosa on soil enzyme activities in a Mediterranean Sabkha. Int J Phytoremediation 2013; 15:188-197. [PMID: 23487995 DOI: 10.1080/15226514.2012.687194] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
In the present work, we studied the effectiveness of the predominant halophytes of Soliman sabkha (Tecticornia indica and Suaeda fruticosa) to promote soil biological activities and ecosystem productivity. Soil Arylsulphatese ARY, beta-glucosidase beta-GLU, phosphatase PHO, invertase INV, urease URE, and dehydogenase DES activities in Extra- and Intra-tuft halophytes and plant productivity were assessed. Results revealed a high increase of microbial community and ARY, beta-GLU, PHO, INV URE and DES activities (+298%, +400%, +800%, +350%, +320%, +25% and +759%, respectively) in Intra-tuft rhizosphere as compared to Extra-tuft one, which is likely due to the significant decrease of salinity in the rhizosphere of Tecticornia indica and Suaeda fruticosa. Both perennial plants exhibited high productivities (7.4 t dry weight ha(-1) and 2.2 t dry weight ha(-1), respectively) and Na+-hyperaccumulating capacities (0.75 t Na+ ha(-1) and 0.22 t Na+ ha(-1), respectively), reducing salt constraint and favouring soil fertility. This constitutes a promising alternative to enhance productivity in such a salt-affected biotope by offering suitable microhabitat for annual glycophytes.
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Affiliation(s)
- Youssef Ouni
- Laboratory of Extremophile Plants, Biotechnology Centre of Borj-Cedria, University of Tunis El Manar, Hammam-Lif, Tunisia
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Saber K, Tarek S, Imen BS, Chedly A. Eco-physiological responses and symbiotic nitrogen fixation capacity of salt-exposed Hedysarum carnosum plants. ACTA ACUST UNITED AC 2010. [DOI: 10.5897/ajb10.211] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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Wided M, Nader BA, Ahmed D, Kamel H, Riadh K, Chedly A. Physiological and biochemical traits involved in the genotypic variability to salt tolerance of TunisianCakile maritima. Afr J Ecol 2009. [DOI: 10.1111/j.1365-2028.2009.01073.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Kourda M, Fraoua-Abdelmoula F, Chedly A, Karma L, Mzabi-Regaya S, Souissi R. [Round, squamous, pigmented plaques]. Ann Dermatol Venereol 2000; 127:521-2. [PMID: 10863188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Affiliation(s)
- M Kourda
- Service de Dermatologie, Hôpital Habib-Thameur, Tunis
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Kheder AB, Bartegi Z, Nacef T, Bouzayen A, Chedly A. [The anaerobic threshold. Its application in the evaluation of cardiorespiratory capacity under effort in high-caliber athletes]. Tunis Med 1984; 62:547-50. [PMID: 6531808] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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