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- W2023891901 abstract "Nuclear matrix attachment regions (MARs) are suggested to regulate chromatin structure and influence the expression of flanking genes. Our previous study showed that TM2, a new DNA fragment isolated from tobacco, can bind with the rice nuclear matrix in vitro and increase transgene expression in vivo. Here, we investigated the role of TM2 MAR in improving transformation frequency of Agrobacterium ‐mediated transformation in tobacco and rice. The gusA reporter gene flanked by TM2 MAR in pBI121 and pCAMBIA‐1301 vectors was controlled by a constitutive promoter or a photosynthetic tissue‐specific promoter. The presence of TM2 MAR in different expression cassettes significantly increased the numbers of kanamycin‐resistant tobacco shoots, hygromycin‐resistant rice calli and shoots. Seeds from the independent transgenic lines with TM2 MAR can germinate normally on the medium containing 500 mg l −1 kanamycin, whereas none of the seeds from the transgenic lines without TM2 MAR survived. Furthermore, RNA gel blot analysis revealed that nptII messenger RNA levels are more abundant in the independent transgenic lines with TM2 MAR than in the lines without TM2 MAR. Altogether, these data reveal a possible mechanism that TM2 MAR improves the transformation frequency by increasing nptII gene expression." @default.
- W2023891901 created "2016-06-24" @default.
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- W2023891901 date "2007-02-07" @default.
- W2023891901 modified "2023-10-15" @default.
- W2023891901 title "High transformation frequency of tobacco and rice via Agrobacterium-mediated gene transfer by flanking a tobacco matrix attachment region" @default.
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- W2023891901 doi "https://doi.org/10.1111/j.1399-3054.2006.00779.x" @default.
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