| Title: | Copper tolerance strategies involving the root cell wall pectins in Silene paradoxa L. |
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| 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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| Files: |
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| Language: | English |
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| Work type: | Not categorized |
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| Typology: | 1.01 - Original Scientific Article |
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| Organization: | UNG - University of Nova Gorica
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| 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. |
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| Keywords: | Copper tolerance
Cell wall
Pectin
Methylation
Root |
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| Year of publishing: | 2012 |
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| Number of pages: | 91-98 |
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| Numbering: | 78, 78 |
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| PID: | 20.500.12556/RUNG-5397 |
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| COBISS.SI-ID: | 5611771 |
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| DOI: | 10.1016/j.envexpbot.2011.12.028 |
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| NUK URN: | URN:SI:UNG:REP:UHG8I3HB |
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| Publication date in RUNG: | 20.04.2020 |
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| Views: | 3598 |
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| Downloads: | 0 |
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