RETRACTED ARTICLE: Transgenic ramie [<Emphasis Type="Italic">Boehmeria nivea</Emphasis> (L.) Gaud.]: factors affecting the efficiency of <Emphasis Type="Italic">Agrobacterium</Emphasis><Emphasis Type="Italic">tumefaciens</Emphasis>-mediated transformation and regeneration |
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Authors: | Bo Wang Lijun Liu Xuxia Wang Jinyu Yang Zhenxia Sun Na Zhang Shimei Gao Xiulong Xing Dingxiang Peng |
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Institution: | (1) College of Plant Science and Technology, Huazhong Agricultural University, 430070 Wuhan, Hubei, China |
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Abstract: | In the present study, an efficient Agrobacterium-mediated gene transformation system was developed for ramie Boehmeria nivea (L.) Gaud.] based on the examinations of several factors affecting plant transformation efficiency. The effects of Agrobacterium cell density, acetosyringone, co-cultivation temperature, co-cultivation duration, co-cultivation photoperiod and pH on stable
transformation were evaluated. Agrobacterium at a concentration of OD = 0.5–0.8 improved the efficiency of transformation. Concentration of acetosyringone at 50 mg/L
during co-cultivation significantly increased transformation efficiency. Co-cultivation at 20°C, in comparison to 15, 25 and
28°C, consistently resulted in higher transformation frequencies. A relatively short co-cultivation duration (3 days) was
optimal for ramie transformation. Co-cultivation medium at pH 5.9 and co-cultivation in darkness both improved the transformation
efficiencies of ramie. An overall scheme for producing transgenic ramie is presented, through which an average transformation
rate from 10.5 to 24.7% in five ramie varieties was obtained. Stable expression and integration of the transgenes were confirmed
by histochemical GUS assay, kanamycin painting assay, PCR and Southern blotting. This optimized transformation system should be employed for efficient
Agrobacterium-mediated transformation of ramie.
An erratum to this article can be found at |
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Keywords: | Ramie GUS Cotyledon Organogenesis Transformation |
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