Reference: Matsuda T, et al. (2009) A novel plant cysteine-rich peptide family conferring cadmium tolerance to yeast and plants. Plant Signal Behav 4(5):419-21

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Abstract


We have identified a novel cDNA clone, termed DcCDT1, from Digitaria ciliaris, that confers cadmium (Cd)-tolerance to yeast (Saccharomyces cerevisiae). The gene encodes a predicted peptide of 55 amino acid residues of which 15 (27.3%) are cysteine residues. We found that monocotyledonous plants possess multiple DcCDT1 homologues, for example rice contains five DcCDT1 homologues (designated OsCDT1~5), whereas dicotyledonous plants, including Arabidopsis thaliana, Brassica rapa, poplar (Populus tremula x Populus alba) and Picea sitchensis, appear to possess only a single homologue. GFP fusion experiments demonstrate that DcCDT1 and OsCDT1 are targeted to both the plant cytoplasmic membranes and cell walls. Constitutive expression of DcCDT1 or OsCDT1 confers Cd-tolerance to transgenic A. thaliana plants by lowering the accumulation of Cd in the cells. The functions of the DcCDT1 family members are discussed in the light of these findings.

Reference Type
Comment | Journal Article
Authors
Matsuda T, Kuramata M, Takahashi Y, Kitagawa E, Youssefian S, Kusano T
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