Cell wall polysaccharide-mediated cadmium tolerance between two Arabidopsis thaliana ecotypes

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dc.creatorXiao, Yan
dc.creatorWu, Xiuwen
dc.creatorLiu, Dong
dc.creatorYao, Junyue
dc.creatorLiang, Guihong
dc.creatorSong, Hai-Xing
dc.creatorIsmail, Abdelbagi M.
dc.creatorLuo, Jin-Song
dc.creatorZhang, Zhenhua
dc.date2020-05-13
dc.date2024-12-19T12:53:59Z
dc.date2024-12-19T12:53:59Z
dc.date.accessioned2026-06-27T04:16:04Z
dc.descriptionCadmium (Cd) is a toxic metal element and the mechanism(s) underlying Cd tolerance in plants are still unclear. Increasingly more studies have been conducted on Cd binding to plant cell walls (CW) but most of them have focused on Cd fixation by CW pectin, and few studies have examined Cd binding to cellulose and hemicellulose. Here we found that Cd binding to CW pectin, cellulose, and hemicellulose was significantly higher in Tor-1, a Cd tolerant A. thaliana ecotype, than in Ph2-23, a sensitive ecotype, as were the concentrations of pectin, cellulose, and hemicellulose. Transcriptome analysis revealed that the genes regulating CW pectin, cellulose, and hemicellulose polysaccharide concentrations in Tor-1 differed significantly from those in Ph2-23. The expressions of most genes such as pectin methyl esterase inhibitors (PMEIs), pectin lyases, xyloglucan endotransglucosylase/hydrolase, expansins (EXPAs), and cellulose hydrolase were higher in Ph2-23, while the expressions of cellulose synthase-like glycosyltransferase 3 (CSLG3) and pectin ethyl esterase 4 (PAE4) were higher in Tor-1. The candidate genes identified here seem to regulate CW Cd fixation by polysaccharides. In conclusion, an increase in pectin demethylation activity, the higher concentration of cellulose and hemicellulose, regulated by related genes, in Tor-1 than in Ph2-23 are likely involved in enhanced Cd CW retention and reduce Cd toxicity.
dc.identifierhttps://hdl.handle.net/10568/164508
dc.identifier.urihttp://hdl.handle.net/123456789/27122
dc.languageen
dc.publisherFrontiers Media
dc.rightsOpen Access
dc.sourceXiao, Yan; Wu, Xiuwen; Liu, Dong; Yao, Junyue; Liang, Guihong; Song, Haixing; Ismail, Abdelbagi M.; Luo, Jin-Song and Zhang, Zhenhua. 2020. Cell wall polysaccharide-mediated cadmium tolerance between two Arabidopsis thaliana ecotypes. Front. Plant Sci., Volume 11
dc.subjectplant science
dc.titleCell wall polysaccharide-mediated cadmium tolerance between two Arabidopsis thaliana ecotypes
dc.typeJournal Article

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