1
|
Wei M, Liu J, Wang S, Wang X, Liu H, Ma Q, Wang J, Shi W. Genetic Diversity and Phylogenetic Analysis of Zygophyllum loczyi in Northwest China's Deserts Based on the Resequencing of the Genome. Genes (Basel) 2023; 14:2152. [PMID: 38136974 PMCID: PMC10742952 DOI: 10.3390/genes14122152] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2023] [Revised: 11/19/2023] [Accepted: 11/23/2023] [Indexed: 12/24/2023] Open
Abstract
In order to study the genetics of local adaptation in all main deserts of northwest China, whole genomes of 169 individuals were resequenced, which covers 20 populations of Zygophyllum loczyi (Zygophyllales: Zygophylaceae). We describe more than 15 million single nucleotide polymorphisms and numerous InDels. The expected heterozygosity and PIC values associated with local adaptation varied significantly across biogeographic regions. Variation in environmental factors contributes largely to the population genetic structure of Z. loczyi. Bayesian analysis performed with STRUCTURE defined four genetic clusters, while the results of principle component analysis were similar. Our results shows that the Qaidam Desert group appears to be diverging into two branches characterized by significant geographic separation and gene flow with two neighboring deserts. Geological data assume that it is possible that the Taklamakan Desert was the original distribution site, and Z. loczyi could have migrated later on and expanded within other desert areas. The above findings provide insights into the processes involved in biogeography, phylogeny, and differentiation within the northwest deserts of China.
Collapse
Affiliation(s)
- Mengmeng Wei
- State Key Laboratory of Desert and Oasis Ecology, Key Laboratory of Ecological Safety and Sustainable, Development in Arid Lands, Xinjiang Institute of Ecology and Geography, Urumqi 830011, China; (M.W.); (J.L.); (X.W.); (J.W.)
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jingdian Liu
- State Key Laboratory of Desert and Oasis Ecology, Key Laboratory of Ecological Safety and Sustainable, Development in Arid Lands, Xinjiang Institute of Ecology and Geography, Urumqi 830011, China; (M.W.); (J.L.); (X.W.); (J.W.)
- University of Chinese Academy of Sciences, Beijing 100049, China
- College of Forestry and Landscape Architecture, Xinjiang Agricultural University, Urumqi 830052, China
| | - Suoming Wang
- State Key Laboratory of Herbage Improvement and Grassland Agro-Ecosystems, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou 730020, China; (S.W.); (H.L.); (Q.M.)
| | - Xiyong Wang
- State Key Laboratory of Desert and Oasis Ecology, Key Laboratory of Ecological Safety and Sustainable, Development in Arid Lands, Xinjiang Institute of Ecology and Geography, Urumqi 830011, China; (M.W.); (J.L.); (X.W.); (J.W.)
- University of Chinese Academy of Sciences, Beijing 100049, China
- Turpan Eremophytes Botanic Garden, The Chinese Academy of Sciences, Turpan 838008, China
| | - Haisuang Liu
- State Key Laboratory of Herbage Improvement and Grassland Agro-Ecosystems, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou 730020, China; (S.W.); (H.L.); (Q.M.)
| | - Qing Ma
- State Key Laboratory of Herbage Improvement and Grassland Agro-Ecosystems, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou 730020, China; (S.W.); (H.L.); (Q.M.)
| | - Jiancheng Wang
- State Key Laboratory of Desert and Oasis Ecology, Key Laboratory of Ecological Safety and Sustainable, Development in Arid Lands, Xinjiang Institute of Ecology and Geography, Urumqi 830011, China; (M.W.); (J.L.); (X.W.); (J.W.)
- University of Chinese Academy of Sciences, Beijing 100049, China
- Turpan Eremophytes Botanic Garden, The Chinese Academy of Sciences, Turpan 838008, China
| | - Wei Shi
- State Key Laboratory of Desert and Oasis Ecology, Key Laboratory of Ecological Safety and Sustainable, Development in Arid Lands, Xinjiang Institute of Ecology and Geography, Urumqi 830011, China; (M.W.); (J.L.); (X.W.); (J.W.)
- University of Chinese Academy of Sciences, Beijing 100049, China
- Turpan Eremophytes Botanic Garden, The Chinese Academy of Sciences, Turpan 838008, China
| |
Collapse
|
2
|
Jalali J, Gaudin P, Capiaux H, Ammar E, Lebeau T. Fate and transport of metal trace elements from phosphogypsum piles in Tunisia and their impact on soil bacteria and wild plants. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2019; 174:12-25. [PMID: 30802673 DOI: 10.1016/j.ecoenv.2019.02.051] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2018] [Revised: 02/13/2019] [Accepted: 02/15/2019] [Indexed: 06/09/2023]
Abstract
The phosphate industry in Tunisia generates large amounts of phosphogypsum (PG) with more than 107 t per year. Environmental impact of this solid waste was studied. Cd, Ce, La, Nd, Sr and Y were analyzed from soils near PG stockpiles (Sfax and M'dhilla) and sediments from marine discharge (Gabes). Their impacts on the bacterial community structure and wild plants were investigated. Metal trace elements (MTE) concentrations (in mg Kg-1 DM) were much higher in contaminated soil than in the control (at 12 km from PG stockpiles). Highest concentrations were recorded in top soil and decreased with depth. A low bacterial diversity was shown (impacted by plants more than by MTE). The MTE concentrations in aerial parts (AP) and roots varied according to the plant species and were higher in contaminated sites. Sr, La and Cd in the AP ranged 33.10-657.56, 2.22-11.05 and 0.21-14.20 mg Kg-1 DM respectively. Plants exhibiting the maximal metal concentrations in AP (in mg Kg-1 DM) were the following: Zygophylum album for Sr (657.56) >Zygophylum album for Cd (14.20) >Zygophylum album (11.05) for La >Conyza canadensis (1.11) for Ce >Conyza canadensis (0.75) for Nd >Arthrocemum inducum (0.72) for Y. Kochia indica showed the highest bioconcentration factor (1.60) for Cd, while Zygophylum album exhibited the highest translocation factor (6.12) for La. Zygophylum album would be the most suitable candidate for MTE phytoextraction. CAPSULE: Phosphogypsum contaminates soils near stockpiles with metal trace elements including rare earth element and selects wild plants able to be used for phytostabilization and phytomining.
Collapse
Affiliation(s)
- Jihen Jalali
- Laboratory of Planetology and Geodynamics of Nantes, UMR 6112 CNRS, Faculty of Sciences and Technology of Nantes, BP 92208, 44322 Nantes Cedex 3, France; Research Unit Coastal and Urban Environments, University of Sfax, National Engineering, School of Sfax, BP 1173, 3038 Sfax, Tunisia
| | - Pierre Gaudin
- Laboratory of Planetology and Geodynamics of Nantes, UMR 6112 CNRS, Faculty of Sciences and Technology of Nantes, BP 92208, 44322 Nantes Cedex 3, France
| | - Hervé Capiaux
- Laboratory of Planetology and Geodynamics of Nantes, UMR 6112 CNRS, Faculty of Sciences and Technology of Nantes, BP 92208, 44322 Nantes Cedex 3, France; Platform for molecular analysis of biodiversity-environnement, IUT Génie Biologique, 85035 La Roche sur Yon, France
| | - Emna Ammar
- Research Unit Coastal and Urban Environments, University of Sfax, National Engineering, School of Sfax, BP 1173, 3038 Sfax, Tunisia
| | - Thierry Lebeau
- Laboratory of Planetology and Geodynamics of Nantes, UMR 6112 CNRS, Faculty of Sciences and Technology of Nantes, BP 92208, 44322 Nantes Cedex 3, France.
| |
Collapse
|
3
|
Pardo T, Bernal MP, Clemente R. Phytostabilisation of severely contaminated mine tailings using halophytes and field addition of organic and inorganic amendments. CHEMOSPHERE 2017; 178:556-564. [PMID: 28351014 DOI: 10.1016/j.chemosphere.2017.03.079] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/31/2016] [Revised: 03/14/2017] [Accepted: 03/20/2017] [Indexed: 06/06/2023]
Abstract
Phytostabilisation strategies have proven to be an efficient remediation option for mine tailings, but the adequate plant species and amendments have to be carefully selected. A remediation experiment was carried out at the semi-field level in tailings (pH 3.2, ≈1100, 4700 and 5000 mg kg-1 of As, Pb and Zn, respectively) from the mining district of La Unión-Cartagena (SE Spain). A red mud derivative (Fe/Al oxides), its combination with compost, and hydrated lime (Ca hydroxide) were applied in field plots of 0.25 m2. After four months of field stabilisation, tailings were transferred unaltered to a plant growth facility, and Atriplex halimus and Zygophyllum fabago (halophytes) were sown. Three months later, trace element (TE) solubility, plant accumulation and chemical speciation in the tailings pore water were studied. In unamended tailings, soluble TEs concentrations were very high (e.g., 40 mg Zn l-1), the dominant species being free ions and SO42-- complexes (>70%). The addition of amendments increased tailings pH (6.7-7), reduced TEs solubility and extractability (>80-99%) and changed the dominant species of soluble Al, Cu, Pb and Zn to hydroxides and/or organo-metallic complexes, but increased slightly the extractable As and soluble Tl concentrations. Plants were able to grow only in amended tailings, and both species presented low levels of Al, As, Cd and Zn. Therefore, the use of combined red mud derivative and compost and halophytes was shown to be a good phytostabilisation strategy, although the dose applied must be carefully chosen in order to avoid possible solubilisation of As and Tl.
Collapse
Affiliation(s)
- T Pardo
- Department of Soil and Water Conservation and Organic Waste Management, CEBAS-CSIC, PO Box 164, 30100, Murcia, Spain
| | - M P Bernal
- Department of Soil and Water Conservation and Organic Waste Management, CEBAS-CSIC, PO Box 164, 30100, Murcia, Spain
| | - R Clemente
- Department of Soil and Water Conservation and Organic Waste Management, CEBAS-CSIC, PO Box 164, 30100, Murcia, Spain.
| |
Collapse
|
4
|
Kamiński P, Barczak T, Bennewicz J, Jerzak L, Bogdzińska M, Aleksandrowicz O, Koim-Puchowska B, Szady-Grad M, Klawe JJ, Woźniak A. Effects of chemical elements in the trophic levels of natural salt marshes. ENVIRONMENTAL GEOCHEMISTRY AND HEALTH 2016; 38:783-810. [PMID: 26358963 DOI: 10.1007/s10653-015-9761-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2014] [Accepted: 08/24/2015] [Indexed: 06/05/2023]
Abstract
The relationships between the bioaccumulation of Na, K, Ca, Mg, Fe, Zn, Cu, Mn, Co, Cd, and Pb, acidity (pH), salinity (Ec), and organic matter content within trophic levels (water-soil-plants-invertebrates) were studied in saline environments in Poland. Environments included sodium manufactures, wastes utilization areas, dumping grounds, and agriculture cultivation, where disturbed Ca, Mg, and Fe exist and the impact of Cd and Pb is high. We found Zn, Cu, Mn, Co, and Cd accumulation in the leaves of plants and in invertebrates. Our aim was to determine the selectivity exhibited by soil for nutrients and heavy metals and to estimate whether it is important in elucidating how these metals are available for plant/animal uptake in addition to their mobility and stability within soils. We examined four ecological plant groups: trees, shrubs, minor green plants, and water macrophytes. Among invertebrates, we sampled breastplates Malacostraca, small arachnids Arachnida, diplopods Diplopoda, small insects Insecta, and snails Gastropoda. A higher level of chemical elements was found in saline polluted areas (sodium manufactures and anthropogenic sites). Soil acidity and salinity determined the bioaccumulation of free radicals in the trophic levels measured. A pH decrease caused Zn and Cd to increase in sodium manufactures and an increase in Ca, Zn, Cu, Cd, and Pb in the anthropogenic sites. pH increase also caused Na, Mg, and Fe to increase in sodium manufactures and an increase in Na, Fe, Mn, and Co in the anthropogenic sites. There was a significant correlation between these chemical elements and Ec in soils. We found significant relationships between pH and Ec, which were positive in saline areas of sodium manufactures and negative in the anthropogenic and control sites. These dependencies testify that the measurement of the selectivity of cations and their fluctuation in soils provide essential information on the affinity and binding strength in these environments. The chemical elements accumulated in soils and plants; however, further flow is selective and variable. The selectivity exhibited by soil systems for nutrients and heavy metals is important in elucidating how these metals become available for plant/animal uptake and also their mobility and stability in soils.
Collapse
Affiliation(s)
- Piotr Kamiński
- Department of Ecology and Environmental Protection, Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University in Toruń, M. Skłodowska-Curie St. 9, 85-094, Bydgoszcz, Poland.
- Department of Biotechnology, Faculty of Biological Sciences, University of Zielona Góra, Prof. Szafran St. 1, 65-516, Zielona Gora, Poland.
| | - Tadeusz Barczak
- Department of Zoology, University of Technology and Life Sciences Bydgoszcz, Kordecki St. 20, 85-061, Bydgoszcz, Poland
| | - Janina Bennewicz
- Department of Zoology, University of Technology and Life Sciences Bydgoszcz, Kordecki St. 20, 85-061, Bydgoszcz, Poland
| | - Leszek Jerzak
- Department of Nature Protection, Faculty of Biological Sciences, University of Zielona Góra, Prof. Szafran St. 1, 65-516, Zielona Gora, Poland
| | - Maria Bogdzińska
- Department of Genetics and Animal Breeding, University of Technology and Life Sciences, Mazowiecka St. 28, 85-084, Bydgoszcz, Poland
| | - Oleg Aleksandrowicz
- Institute of Biology and Environment Protection, Department of Zoology, Pomeranian University, Arciszewski St. 22 B, 76-200, Słupsk, Poland
| | - Beata Koim-Puchowska
- Department of Ecology and Environmental Protection, Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University in Toruń, M. Skłodowska-Curie St. 9, 85-094, Bydgoszcz, Poland
| | - Małgorzata Szady-Grad
- Department of Hygiene and Epidemiology, Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University in Toruń, M. Skłodowska-Curie St. 9, 85-094, Bydgoszcz, Poland
| | - Jacek J Klawe
- Department of Hygiene and Epidemiology, Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University in Toruń, M. Skłodowska-Curie St. 9, 85-094, Bydgoszcz, Poland
| | - Alina Woźniak
- Department of Medical Biology, Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University in Toruń, Karłowicz St. 24, 85-092, Bydgoszcz, Poland
| |
Collapse
|
5
|
Lutts S, Lefèvre I. How can we take advantage of halophyte properties to cope with heavy metal toxicity in salt-affected areas? ANNALS OF BOTANY 2015; 115:509-28. [PMID: 25672360 PMCID: PMC4332614 DOI: 10.1093/aob/mcu264] [Citation(s) in RCA: 111] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2014] [Revised: 10/01/2014] [Accepted: 12/10/2014] [Indexed: 05/15/2023]
Abstract
BACKGROUND Many areas throughout the world are simultaneously contaminated by high concentrations of soluble salts and by high concentrations of heavy metals that constitute a serious threat to human health. The use of plants to extract or stabilize pollutants is an interesting alternative to classical expensive decontamination procedures. However, suitable plant species still need to be identified for reclamation of substrates presenting a high electrical conductivity. SCOPE Halophytic plant species are able to cope with several abiotic constraints occurring simultaneously in their natural environment. This review considers their putative interest for remediation of polluted soil in relation to their ability to sequester absorbed toxic ions in trichomes or vacuoles, to perform efficient osmotic adjustment and to limit the deleterious impact of oxidative stress. These physiological adaptations are considered in relation to the impact of salt on heavy metal bioavailabilty in two types of ecosystem: (1) salt marshes and mangroves, and (2) mine tailings in semi-arid areas. CONCLUSIONS Numerous halophytes exhibit a high level of heavy metal accumulation and external NaCl may directly influence heavy metal speciation and absorption rate. Maintenance of biomass production and plant water status makes some halophytes promising candidates for further management of heavy-metal-polluted areas in both saline and non-saline environments.
Collapse
Affiliation(s)
- Stanley Lutts
- Groupe de Recherche en Physiologie végétale (GRPV) - Earth and Life Institute - Agronomy (ELI-A), Université catholique de Louvain, 4-5 (Bte 7.07.13) Place Croix du Sud, 1348 Louvain-la-Neuve, France and Institute of Plant Molecular Biology, Biology Centre CAS, Branišovská 31, 37005 České Budějovice, Czech Republic
| | - Isabelle Lefèvre
- Groupe de Recherche en Physiologie végétale (GRPV) - Earth and Life Institute - Agronomy (ELI-A), Université catholique de Louvain, 4-5 (Bte 7.07.13) Place Croix du Sud, 1348 Louvain-la-Neuve, France and Institute of Plant Molecular Biology, Biology Centre CAS, Branišovská 31, 37005 České Budějovice, Czech Republic Groupe de Recherche en Physiologie végétale (GRPV) - Earth and Life Institute - Agronomy (ELI-A), Université catholique de Louvain, 4-5 (Bte 7.07.13) Place Croix du Sud, 1348 Louvain-la-Neuve, France and Institute of Plant Molecular Biology, Biology Centre CAS, Branišovská 31, 37005 České Budějovice, Czech Republic
| |
Collapse
|
6
|
Lefèvre I, Vogel-Mikuš K, Jeromel L, Vavpetič P, Planchon S, Arčon I, Van Elteren JT, Lepoint G, Gobert S, Renaut J, Pelicon P, Lutts S. Differential cadmium and zinc distribution in relation to their physiological impact in the leaves of the accumulating Zygophyllum fabago L. PLANT, CELL & ENVIRONMENT 2014; 37:1299-320. [PMID: 24237383 DOI: 10.1111/pce.12234] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2013] [Revised: 10/20/2013] [Accepted: 10/21/2013] [Indexed: 05/12/2023]
Abstract
Cadmium and zinc share many similar physiochemical properties, but their compartmentation, complexation and impact on other mineral element distribution in plant tissues may drastically differ. In this study, we address the impact of 10 μm Cd or 50 μm Zn treatments on ion distribution in leaves of a metallicolous population of the non-hyperaccumulating species Zygophyllum fabago at tissue and cell level, and the consequences on the plant response through a combined physiological, proteomic and metabolite approach. Micro-proton-induced X-ray emission and laser ablation inductively coupled mass spectrometry analyses indicated hot spots of Cd concentrations in the vicinity of vascular bundles in response to Cd treatment, essentially bound to S-containing compounds as revealed by extended X-ray absorption fine structure and non-protein thiol compounds analyses. A preferential accumulation of Zn occurred in vascular bundle and spongy mesophyll in response to Zn treatment, and was mainly bound to O/N-ligands. Leaf proteomics and physiological status evidenced a protection of photosynthetically active tissues and the maintenance of cell turgor through specific distribution and complexation of toxic ions, reallocation of some essential elements, synthesis of proteins involved in photosynthetic apparatus or C-metabolism, and metabolite synthesis with some specificities regarding the considered heavy metal treatment.
Collapse
Affiliation(s)
- Isabelle Lefèvre
- Groupe de Recherche en Physiologie végétale (GRPV), Earth and Life Institute - Agronomy (ELI-A), Université catholique de Louvain, Croix du Sud 4-5, bte L7.07.13, 1348, Louvain-la-Neuve, Belgium
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
7
|
Kabas S, Arocena JM, Acosta JA, Faz A, Martínez-Martínez S, Zornoza R, Carmona DM. Syrian bean-caper (Zygophyllum fabago L.) improves organic matter and other properties of mine wastes deposits. INTERNATIONAL JOURNAL OF PHYTOREMEDIATION 2014; 16:366-378. [PMID: 24912237 DOI: 10.1080/15226514.2013.783552] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The omni-presence of Zygophyllum fabago L. (Syrian bean-caper) natural colonies in post mining areas prompted us to investigate its contributions to reclamation of mine wastes deposits in southeast Spain. Select plant-related (edaphic) characteristics and bio- and water soluble-Cd, Cu, Pb and Zn in rhizosphere of Z. fabago were compared to deposits one year since application of pig slurry and marble waste. Total N in rhizosphere increased up to a factor of 20X (339 vs 17 mg N kg(-1)) in El Gorguel and 27X (85 vs 3.1 mg N kg(-1)) in El Lirio sites. Organic matter accumulation in rhizosphere from litter and roots of Z. fabago increased organic C from 6.6 to 19.5 g kg(-1) in El Gorguel and from 2.1 to 5.7 g kg(-1) in El Lirio in one year. Dissolution of inorganic C takes place due to organic acids from root exudates of Z. fabago. Reduction in bio-available Cd, Cu, Pb, and Zn in rhizosphere of Z. fabago at El Lirio is attributed to increase in pH from 5.3 to 7.7 through marble waste addition, although increased cation exchange capacity may also have played a role. Addition of marble waste to encourage colonization by Z. fabago in acidic mine wastes deposits was recommended.
Collapse
|
8
|
Lefèvre I, Correal E, Lutts S. Impact of cadmium and zinc on growth and water status of Zygophyllum fabago in two contrasting metallicolous populations from SE Spain: comparison at whole plant and tissue level. PLANT BIOLOGY (STUTTGART, GERMANY) 2010; 12:883-894. [PMID: 21040303 DOI: 10.1111/j.1438-8677.2009.00296.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Cadmium and zinc accumulation and toxicity were assessed in whole plants and callus culture of two Zygophyllum fabago populations originating from two metallicolous sites in Murcia (southeast Spain), La Peña and Mazarrón, the first containing 2.8-times more Cd and five-times more Zn than the second. Seedlings from both ecotypes were exposed for 3 weeks to 1 or 10 μm Cd, and to 10 or 100 μm Zn in nutrient solution in a controlled environment. Calli from both ecotypes were exposed to 0.01, 0.1 or 1 mm Cd, and to 0.1, 1 or 5 mm Zn. Plants from both populations exhibited similar tolerance to Zn, while tolerance to Cd appeared more important in plants from La Peña than those from Mazarrón. Only minor differences were recorded in final Cd accumulation, with higher Cd retention in roots and stems of plants from La Peña. In both populations, transient decreases in the rate of Zn intake and translocation from root to shoot were recorded. This reduction in ion uptake was not more efficient for the population from the most contaminated area compared to the less contaminated area. Similar concentrations of Cd were found in cotyledon-derived calli from the two populations, but absorbed Cd induced conspicuous water stress in calli issues from Mazarrón but not in those from La Peña. It is concluded that, beside comparable levels of heavy metal concentration in tissues, the physiological strategy of tolerance may differ according to the metal and according to the considered population.
Collapse
Affiliation(s)
- I Lefèvre
- Groupe de Recherche en Physiologie végétale, Université catholique de Louvain, Louvain-la-Neuve, Belgium
| | | | | |
Collapse
|
9
|
|
10
|
Delpérée C, Lutts S. Growth inhibition occurs independently of cell mortality in tomato (Solanum lycopersicum) exposed to high cadmium concentrations. JOURNAL OF INTEGRATIVE PLANT BIOLOGY 2008; 50:300-310. [PMID: 18713362 DOI: 10.1111/j.1744-7909.2007.00625.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
In order to analyze the adaptation potential of tomato shoots to a sudden increase in Cd concentration, tomato plants (Solanum lycopersicum L. var. Ailsa Craig) were exposed under controlled environmental conditions to a high dose of this heavy metal (250 microM CdCl2) in nutrient solution for 7 and 14 d. Both root and shoot growth was completely inhibited but all plants remained alive until the end of the treatment. Cell viability remained unaffected but the activity of the mitochondrial alternative pathway was stimulated by Cd stress at the expense of the cytochrome pathway. Cadmium concentration was higher in roots than in shoots and a decrease in the rate of net Cd translocation was noticed during the second week of stress. Cadmium decreased both leaf conductance (g(l)) and chlorophyll concentration. However, the effect on net CO2 assimilation remained limited and soluble sugars accumulated in leaves. Photochemical efficiency of PSII (Fv/Fm) was not affected despite a decrease in the number of reaction centers and an inhibition of electron transfer to acceptors of PSII. It is concluded that tomato shoot may sustain short term exposure to high doses of cadmium despite growth inhibition. This property implies several physiological strategies linked to both avoidance and tolerance mechanisms.
Collapse
Affiliation(s)
- Christine Delpérée
- (Unité de Biologie végétale, Université catholique de Louvain, 5 (Bte 13) Place Croix du Sud, 1348 Louvain-la-Neuve, Belgium)
| | | |
Collapse
|