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Title:Copper tolerance strategies involving the root cell wall pectins in Silene paradoxa L.
Authors:ID Colzi, Ilaria, Department of Evolutionary Biology, Università di Firenze, via Micheli 1, 50121 Firenze, Italy (Author)
ID Arnetoli, Miluscia, Department of Evolutionary Biology, Università di Firenze, via Micheli 1, 50121 Firenze, Italy (Author)
ID Gallo, Alessia, Department of Evolutionary Biology, Università di Firenze, via Micheli 1, 50121 Firenze, Italy (Author)
ID Doumett, Saer, Department of Chemistry, Università di Firenze, via della Lastruccia, 3, 50019 Sesto Fiorentino (FI), Italy (Author)
ID Del Bubba, Massimo, Department of Chemistry, Università di Firenze, via della Lastruccia, 3, 50019 Sesto Fiorentino (FI), Italy (Author)
ID Pignattelli, Sara, Department of Evolutionary Biology, Università di Firenze, via Micheli 1, 50121 Firenze, Italy (Author)
ID Gabbrielli, Roberto, Department of Evolutionary Biology, Università di Firenze, via Micheli 1, 50121 Firenze, Italy (Author)
ID Gonnelli, Cristina, Department of Evolutionary Biology, Università di Firenze, via Micheli 1, 50121 Firenze, Italy (Author)
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Language:English
Work type:Not categorized
Typology:1.01 - Original Scientific Article
Organization:UNG - University of Nova Gorica
Abstract:New insights were provided on the function of root cell wall pectin concentration and methylation degree in copper tolerance studying contrasting ecotypes of Silene paradoxa. A metallicolous copper tolerant population and a non-metallicolous sensitive population were grown in hydroponics and exposed to different CuSO4 treatments to evaluate copper accumulation in relation to pectin concentration and methylation degree of the root cell wall. In short-term exposure experiments the tolerant population decreased root cell wall pectin concentration and increased their methylation degree, while the sensitive population did not respond. Moreover, a positive correlation between root pectin concentration and metal accumulation in root apoplast and symplast was found. In addition, a negative correlation between pectin methylation degree and apoplastic copper concentration were found to be negatively correlated. In longterm exposure experiments, the sensitive population increased the concentration of pectins with the same methylation degree and consequently the ability of its root cell wall to bind the metal. The opposite phenomenon was shown by the tolerant population. Moreover, pectin methylation degree was higher in the tolerant population in respect to the sensitive one, possibly to limit metal binding to the root cell wall. Therefore, in the copper tolerant population of S. paradoxa the generation of metal-excluding root cell walls was suggested to be one of the factors concurring to guarantee a low apoplastic copper accumulation and probably also to limit symplastic copper uptake by the root cells.
Keywords:Copper tolerance Cell wall Pectin Methylation Root
Year of publishing:2012
Number of pages:91-98
Numbering:78, 78
PID:20.500.12556/RUNG-5397 New window
COBISS.SI-ID:5611771 New window
DOI:10.1016/j.envexpbot.2011.12.028 New window
NUK URN:URN:SI:UNG:REP:UHG8I3HB
Publication date in RUNG:20.04.2020
Views:3006
Downloads:0
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Record is a part of a journal

Title:Environmental and Experimental Botany
Shortened title:ENVIRON EXP BOT
Year of publishing:2012
ISSN:0098-8472

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License:CC BY-NC-ND 4.0, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
Link:http://creativecommons.org/licenses/by-nc-nd/4.0/
Description:The most restrictive Creative Commons license. This only allows people to download and share the work for no commercial gain and for no other purposes.
Licensing start date:20.04.2020

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