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• W3025665548 endingPage "110501" @default.
• W3025665548 startingPage "110501" @default.
• W3025665548 abstract "Here, we describe functional characterization of Arabidopsis thaliana MYB4 transcription factor, a member of R2R3-subfamily of MYB domain protein, in the regulation of Cd-stress tolerance in Arabidopsis. Transgenic Arabidopsis plants overexpressing MYB4 showed appreciable Cd tolerance than wild-type plants, while MYB4 loss of function mutant lines (atmyb4) showed increased sensitivity to Cd-stress. MYB4 overexpression lines showed strong activation of anti-oxidant defense components and increased Cd accumulation than wild-type and atmyb4 mutant lines under Cd-stress. MYB4 overexpression resulted in the coordinated activation of the expression of phytochelatin (PC) synthesis related genes and specifically enhanced the transcript abundance of phytochelatin synthase 1 (PCS1) and metallothionein 1C (MT1C) genes under Cd-stress. In contrast, atmyb4 mutant lines showed reduced Cd accumulation and compromised expression of PC-synthesis related genes. Electrophoretic gel mobility shift assays have demonstrated specific binding activity of recombinant AtMYB4 to the putative MYB4-binding motifs ACCAACCAA and GGTAGGT identified in the promoters of PCS1 and MT1C genes, respectively. Further analyses have revealed that MYB4 binds directly to PCS1 and MT1C promoters in vivo and positively regulates their transcriptional expression, suggesting that PCS1 and MT1C are the key targets of MYB4. Overall, our results have provided evidence that MYB4 regulates Cd-tolerance via the coordinated activity of improved anti-oxidant defense system and through the enhanced expression of PCS1 and MT1C under Cd-stress in Arabidopsis." @default.
• W3025665548 created "2020-05-21" @default.
• W3025665548 creator A5031591908 @default.
• W3025665548 creator A5045276240 @default.
• W3025665548 creator A5052124218 @default.
• W3025665548 creator A5075838514 @default.
• W3025665548 date "2020-08-01" @default.
• W3025665548 modified "2023-10-18" @default.
• W3025665548 title "MYB4 transcription factor, a member of R2R3-subfamily of MYB domain protein, regulates cadmium tolerance via enhanced protection against oxidative damage and increases expression of PCS1 and MT1C in Arabidopsis" @default.
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• W3025665548 doi "https://doi.org/10.1016/j.plantsci.2020.110501" @default.
• W3025665548 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/32563471" @default.
• W3025665548 hasPublicationYear "2020" @default.
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