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- W4381988751 abstract "The auxin polar transporter, PIN-FORMED 2 (PIN2) plays an important role in root development. However, it remains unclear whether <i>PIN2</i> genes form two <i>Liriodendron</i> species, <i>L. chinense (<i>LcPIN2</i>)</i> and <i>L. tulipifera (<i>LtPIN2</i>)</i>, are both involved in root development and whether and to what extent these two genes diverge in function. Here, we cloned and overexpressed <i>LcPIN2</i> and <i>LtPIN2</i> in A<i>rabidopsis thaliana</i> wild-type (WT) and <i>Atpin2</i> mutant. Phylogenetic and sequence analysis showed a small degree of differentiation between these two <i>Liriodendron PIN2</i> genes. Tissue-specific gene expression analysis indicated that both <i>Liriodendron PIN2</i> genes were highly expressed in roots, implying a potential role in root development. Finally, heterologous overexpression of <i>LcPIN2</i> and <i>LtPIN2</i> in <i>Arabidopsis</i> both significantly increased the root length compared to wild-type and empty vector. Furthermore, the root length defect in <i>Atpin2</i> was complemented both by <i>LcPIN2</i> and <i>LtPIN2</i>. However, heterologous overexpression of <i>LcPIN2</i> and <i>LtPIN2</i> cannot rescue the defect in root gravitropism of <i>Atpin2</i> mutants. Taken together, our findings unravel <i>PIN2</i> genes from the magnoliids plant <i>Liriodendron</i> were functionally conserved with AtPIN2 in the dicotyledonous plant <i>Arabidopsis</i> in regard to the regulation of root length, but not root gravitropism. This study also provides a potential target for genetic improvement of the root system in these valuable forest trees <i>Liriodendron</i>." @default.
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- W4381988751 date "2023-01-01" @default.
- W4381988751 modified "2023-09-26" @default.
- W4381988751 title "Overexpression of the LcPIN2 and LtPIN2 Gene in Arabidopsis thaliana Promotes Root Elongation" @default.
- W4381988751 doi "https://doi.org/10.32604/phyton.2023.029845" @default.
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