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• W4385800263 abstract "Abstract In response to our ever-increasing demand for metals, phytotechnologies are being developed to limit the environmental impact of conventional metal mining. However, the development of these technologies, which rely on plant species able to tolerate and accumulate metals, is partly limited by our lack of knowledge of the underlying molecular mechanisms. In this work, we aimed to identify genes involved in nickel hyperaccumulation in the Euphorbiaceae species Leucocroton havanensis . Using transcriptomic data, we identified two homologous genes, LhavIREG1 and LhavIREG2 , encoding divalent metal transporters of the IREG/ferroportin family. Both genes are expressed at similar levels in shoots, but LhavIREG1 shows higher expression in roots. Heterologous expression of these transporters in A. thaliana revealed that LhavIREG1 is localized to the plasma membrane, whereas LhavIREG2 is located at the vacuole. In addition, expression of each gene induced a significant increase in nickel tolerance. Taken together, our data suggest that LhavIREG2 is involved in nickel sequestration in vacuoles of leaf cells, whereas LhavIREG1 is mainly involved in nickel translocation from roots to shoots, but could also be involved in metal sequestration in cell walls. Our results suggest that paralogous IREG/ferroportin transporters may play complementary roles in nickel hyperaccumulation in plants. Highlight The nickel hyperaccumulator Leucocroton havanensis endemic to Cuba, expresses two paralogous metal transporters of the IREG/ferroportin family that play distinct but complementary roles in nickel tolerance and accumulation." @default.
• W4385800263 created "2023-08-15" @default.
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• W4385800263 date "2023-08-11" @default.
• W4385800263 modified "2023-09-27" @default.
• W4385800263 title "Divergent roles of IREG/Ferroportin transporters from the nickel hyperaccumulator<i>Leucocroton havanensis</i>" @default.
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• W4385800263 doi "https://doi.org/10.1101/2023.08.11.552958" @default.
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