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Chakkour S, Kassout J, Kadaoui K, El Ghalabzouri A, Sahli A, Kadiri M, Ater M. Arable plant communities of ultramafic and non-ultramafic soils in Beni Bousera (North Morocco). COMMUNITY ECOL 2023. [DOI: 10.1007/s42974-023-00140-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/29/2023]
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Capuana M, Colzi I, Buccianti A, Coppi A, Palm E, Del Bubba M, Gonnelli C. Paradoxical effects of density on measurement of copper tolerance in Silene paradoxa L. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:1331-1339. [PMID: 29086177 DOI: 10.1007/s11356-017-0593-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2017] [Accepted: 10/24/2017] [Indexed: 06/07/2023]
Abstract
This work investigated if the assessment of tolerance to trace metals can depend on plant density in the experimental design. A non-metallicolous and a metallicolous populations of Silene paradoxa were hydroponically cultivated at increasing density and in both the absence (-Cu conditions) and excess of copper (+Cu conditions). In -Cu conditions, the metallicolous population showed a lower susceptibility to plant density in comparison to the non-metallicolous one, explained by a higher capacity of the metallicolous population to exploit resources. In +Cu conditions, an alleviating effect of increasing density was found in roots. Such effect was present to a greater extent in the non-metallicolous population, thus making the populations equally copper-tolerant at the highest density used. In shoots, an additive effect of increasing plant density to copper toxicity was reported. Its higher intensity in the metallicolous population reverted the copper tolerance relationship at the highest plant densities used. In both populations, a density-induced decrease in root copper accumulation was observed, thus concurring to the reported mitigation in +Cu conditions. Our work revealed the importance of density studies on the optimization of eco-toxicological bioassays and of metal tolerance assessment and it can be considered the first example of an alleviating effect of increasing plant number on copper stress in a metallophyte.
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Affiliation(s)
- Maurizio Capuana
- Institute of Bioscience and Bioresources-Consiglio Nazionale delle Ricerche, Polo Scientifico, Via Madonna del Piano 10, Sesto Fiorentino, Florence, Italy
| | - Ilaria Colzi
- Department of Biology, Università di Firenze, via Micheli 1, 50121, Florence, Italy
| | - Antonella Buccianti
- Department of Earth Science, Università di Firenze, via La Pira 4, 50121, Florence, Italy
| | - Andrea Coppi
- Department of Biology, Università di Firenze, via Micheli 1, 50121, Florence, Italy
| | - Emily Palm
- Department of Agri-Food and Environmental Science, Università di Firenze, via delle Idee 30, Sesto Fiorentino, 50019, Florence, Italy
| | - Massimo Del Bubba
- Department of Chemistry, University of Florence, Via della Lastruccia 3, Sesto Fiorentino, 50019, Florence, Italy
| | - Cristina Gonnelli
- Department of Biology, Università di Firenze, via Micheli 1, 50121, Florence, Italy.
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Bazihizina N, Colzi I, Giorni E, Mancuso S, Gonnelli C. Photosynthesizing on metal excess: copper differently induced changes in various photosynthetic parameters in copper tolerant and sensitive Silene paradoxa L. populations. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2015; 232:67-76. [PMID: 25617325 DOI: 10.1016/j.plantsci.2014.12.015] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2014] [Revised: 12/16/2014] [Accepted: 12/17/2014] [Indexed: 05/22/2023]
Abstract
This work investigated Cu-induced changes in photosynthetic activity in contrasting populations of Silene paradoxa L. A metallicolous Cu-tolerant population and a non-metallicolous sensitive population were grown in hydroponics and exposed to different CuSO4 treatments for different times. Copper accumulation, MDA concentrations, and several photosynthetic parameters were measured to assess different effects of Cu exposure on plants from the two populations. A more efficient ability to photosynthesize in the presence of Cu excess was showed by the Cu-tolerant population with respect to the sensitive one. Interestingly, Cu-imposed limitations were present not only at a different degree, but also of different nature in the two populations. In the tolerant population, the most limiting factor to photosynthesis seemed to be Cu-imposed stomatal closure, whereas Cu-mediated biochemical limitation was scarce and Cu-mediated reduction in mesophyll conductance almost non-existent. In the sensitive population, Cu largely affected all the measured parameters, so that its photosynthetic activity experienced any kind of limitation, diffusional and especially biochemical. The lower Cu concentrations accumulated in the tolerant plant could be one of the factors concurring to the reported differences in photosynthetic activity, but also a higher capacity of internal detoxification and compartmentalization of the metal could not be excluded.
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Affiliation(s)
- Nadia Bazihizina
- Department of Agri-Food and Environmental Science, Università di Firenze, via delle Idee 30, Sesto Fiorentino, 50019 Firenze, Italy.
| | - Ilaria Colzi
- Department of Biology, Università di Firenze, via Micheli 1, 50121 Firenze, Italy.
| | - Elisabetta Giorni
- Department of Biology, Università di Firenze, via Micheli 1, 50121 Firenze, Italy.
| | - Stefano Mancuso
- Department of Agri-Food and Environmental Science, Università di Firenze, via delle Idee 30, Sesto Fiorentino, 50019 Firenze, Italy.
| | - Cristina Gonnelli
- Department of Biology, Università di Firenze, via Micheli 1, 50121 Firenze, Italy.
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Pignattelli S, Colzi I, Buccianti A, Cecchi L, Arnetoli M, Monnanni R, Gabbrielli R, Gonnelli C. Exploring element accumulation patterns of a metal excluder plant naturally colonizing a highly contaminated soil. JOURNAL OF HAZARDOUS MATERIALS 2012; 227-228:362-369. [PMID: 22673060 DOI: 10.1016/j.jhazmat.2012.05.075] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2012] [Revised: 05/11/2012] [Accepted: 05/20/2012] [Indexed: 06/01/2023]
Abstract
This work investigates the element distribution in Silene paradoxa growing on the mine dump of Fenice Capanne (Tuscany, Italy). The accumulation of As, Cd, Co, Cr, Cu, Fe, Mn, Ni, Pb and Zn in root apoplast and symplast and in shoot was assessed and compared to the levels of the same metals in the respective rizosphere soils, analyzing both the total and the phytoavailable fractions. Levels of As, Cu, Fe, Pb and Zn, were above toxicity thresholds in both soil and shoot samples. Inter- and intra-element correlations were analyzed in plant and soil using different statistical methods. Soil total and phytoavailable metal concentration were shown not to be dominant in determining metal accumulation by the plant, since no significant positive correlation was found between metal concentration in soils and plants. Moreover, results indicated that S. paradoxa was able to cope with the studied multi-metal contaminated soil excluding the elements from its tissues and preferentially accumulating them into the root compartment, thus suggesting this species as possible good candidate for phytostabilization purposes.
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Affiliation(s)
- S Pignattelli
- Department of Evolutionary Biology, University of Florence, Firenze, Italy
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Cassina L, Tassi E, Morelli E, Giorgetti L, Remorini D, Chaney RL, Barbafieri M. Exogenous cytokinin treatments of an Ni hyper-accumulator, Alyssum murale, grown in a serpentine soil: implications for phytoextraction. INTERNATIONAL JOURNAL OF PHYTOREMEDIATION 2011; 13 Suppl 1:90-101. [PMID: 22046753 DOI: 10.1080/15226514.2011.568538] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Application of exogenous plant growth regulators was examined as a viable technique to increase the efficiency of plant metal extraction from contaminated soils. The aim of this study was to investigate the alteration of Ni phytoextraction by Alyssum murale, a Ni hyperaccumulator, following the application of cytokinins. The following parameters were investigated: Ni accumulation, plant growth, gas exchange, stomata behavior and the concentration of nonprotein thiols (glutathione, y-Glu-Cys, and phytochelatins). In a pot experiment, A. murale plants grown in a serpentine soil were treated with a mix of naturally occurring cytokinins. Results showed that Ni accumulation in plants ranged from 4000 to 7000 mg kg(-1) confirming the hyper-accumulation ability from the soil used. Cytokinin treatments produced a significant increase in plant biomass and transpiration rate whereas no significant variation in Ni accumulation or the concentration of non-protein thiols was observed. The results suggest that A. murale is a plant species sensitive to cytokinin treatment and that cytokinin treatment is potentially useful in increasing the phytoextraction capability by increasing biomass. Moreover, for first time, evidence was obtained that the Ni hyperaccumulation mechanism is independent of water flux and transpiration rate.
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Affiliation(s)
- L Cassina
- CNR, Institute of Ecosystem Study, Section of Pisa, Italy
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Kazakou E, Dimitrakopoulos PG, Baker AJM, Reeves RD, Troumbis AY. Hypotheses, mechanisms and trade-offs of tolerance and adaptation to serpentine soils: from species to ecosystem level. Biol Rev Camb Philos Soc 2008; 83:495-508. [PMID: 18823392 DOI: 10.1111/j.1469-185x.2008.00051.x] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Understanding the relative importance of the abiotic environment and species interactions in determining the distribution and abundance of organisms has been a challenge in ecological research. Serpentine substrata are stressful environments for plant growth due to multiple limitations, collectively called the "serpentine syndrome". In the present review, our aim is not only to describe recent work in serpentine ecology, but also to highlight specific mechanisms of species tolerance and adaptation to serpentine soils and their effects on community structure and ecosystem functioning. We present hypotheses of the development of serpentine endemism and a description of functional traits of serpentine plants together with a synthesis of species interactions in serpentine soils and their effects on community structure and ecosystem productivity. In addition, we propose hypotheses about the effects of the 'serpentine syndrome' on ecosystem processes including productivity and decomposition.
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Affiliation(s)
- E Kazakou
- Biodiversity Conservation Laboratory, Department of Environment, University of the Aegean, University Hill, 81100 Mytilene, Lesbos, Greece.
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Quantifying the effects of nutrient addition on community diversity of serpentine vegetation using parametric entropy of type α. ACTA OECOLOGICA-INTERNATIONAL JOURNAL OF ECOLOGY 2004. [DOI: 10.1016/j.actao.2003.11.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Chiarucci A, Rocchini D, Leonzio C, De Dominicis V. A test of vegetation-environment relationship in serpentine soils of Tuscany, Italy. Ecol Res 2002. [DOI: 10.1046/j.1440-1703.2001.00437.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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