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Agrobacterium rhizogenes-mediated transformation of a high oil-producing fil a m en to us fungusUmbelopsis isabellina

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Abstract

TheAgrobacterium rhizogenes-mediated transformation procedure was developed by using the hygromycin B phosphotransferase gene (hph) as a selective marker for the oil-producing fungusUmbelopsis isabellina. Different conditions were combined to increase the transformation efficiency. The highest efficiency was obtained by usingA. rhizogenes strain R105 and a vector with zygomycete promoter. Southern blot analysis demonstrated that 71 % of transformants contained random integrations of T-DNA sequences under optimal conditions. We randomly selected 115 positive transformants resistant to hygromycin to analyze the amount of total fatty acid and gamma-linolenic acid (GLA). Six transformants produced a higher amount of total fatty acids than the wild strain, and one transformant also produced a higher level of GLA than the wild strain in gas chromatography analysis. This is the first report about usingA. rhizogenes strain R105 and germinated conidia to transform successfully the recalcitrant zygomycetes and to obtain transformants with a stable phenotype.

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Authors and Affiliations

  1. Key Laboratory of Molecular Microbiology and Technology, Ministry of Education, Department of Microbiology, Nankai University, 300071, Tianjin, PR China

    D. Sh. Wei, Y. H. Zhang, L. J. Xing & M. Ch. Li

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  1. D. Sh. Wei
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  2. Y. H. Zhang
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  3. L. J. Xing
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  4. M. Ch. Li
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Correspondence to M. Ch. Li.

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Wei, D.S., Zhang, Y.H., Xing, L.J. et al. Agrobacterium rhizogenes-mediated transformation of a high oil-producing fil a m en to us fungusUmbelopsis isabellina. J Appl Genet 51, 225–232 (2010). https://doi.org/10.1007/BF03195734

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  • DOI: https://doi.org/10.1007/BF03195734

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