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Title:Copper tolerance strategies involving the root cell wall pectins in Silene paradoxa L.
Authors:Colzi, Ilaria (Author)
Arnetoli, Miluscia (Author)
Gallo, Alessia (Author)
Doumett, Saer (Author)
Del Bubba, Massimo (Author)
Pignattelli, Sara (Author)
Gabbrielli, Roberto (Author)
Gonnelli, Cristina (Author)
Files:This document has no files. This document may have a phisical copy in the library of the organization, check the status via COBISS. Link is opened in a new window
Language:English
Work type:Not categorized (r6)
Tipology: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
COBISS_ID:5611771 Link is opened in a new window
URN:URN:SI:UNG:REP:UHG8I3HB
DOI:10.1016/j.envexpbot.2011.12.028 Link is opened in a new window
License:CC BY-NC-ND 4.0
This work is available under this license: Creative Commons Attribution Non-Commercial No Derivatives 4.0 International
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Record is a part of a journal

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

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