Protoplast transformation as a potential platform for exploring gene function in Verticillium dahliae

文献类型: 外文期刊

第一作者: Rehman, Latifur

作者: Rehman, Latifur;Su, Xiaofeng;Guo, Huiming;Qi, Xiliang;Cheng, Hongmei

作者机构:

关键词: Verticillium dahliae;Driselase;Transformation;siRNAs

期刊名称:BMC BIOTECHNOLOGY ( 影响因子:2.563; 五年影响因子:3.292 )

ISSN: 1472-6750

年卷期: 2016 年 16 卷

页码:

收录情况: SCI

摘要: Background: Large efforts have focused on screening for genes involved in the virulence and pathogenicity of Verticillium dahliae, a destructive fungal pathogen of numerous plant species that is difficult to control once the plant is infected. Although Agrobacterium tumefaciens-mediated transformation (ATMT) has been widely used for gene screening, a quick and easy method has been needed to facilitate transformation. Results: High-quality protoplasts, with excellent regeneration efficiency (65 %) in TB3 broth (yeast extract 30 g, casamino acids 30 g and 200g sucrose in 1L H(2)0), were generated using driselase (Sigma D-9515) and transformed with the GFP plasmid or linear GFP cassette using PEG or electroporation. PEG-mediated transformation yielded 600 transformants per microgram DNA for the linear GFP cassette and 250 for the GFP plasmid; electroporation resulted in 29 transformants per microgram DNA for the linear GFP cassette and 24 for the GFP plasmid. To determine whether short interfering RNAs (siRNAs) can be delivered to the protoplasts and used for silencing genes, we targeted the GFP gene of Vd-GFP (V. dahliae GFP strain obtained in this study) by delivering one of four different siRNAs-19-nt duplex with 2-nt 3' overhangs (siRNA-gfp1, siRNA-gfp2, siRNA-gfp3 and siRNA-gfp4)-into the Vd-GFP protoplasts using PEG-mediated transformation. Up to 100 % silencing of GFP was obtained with siRNA-gfp4; the other siRNAs were less effective (up to 10 % silencing). Verticillium transcription activator of adhesion (Vta2) gene of V. dahliae was also silenced with four siRNAs (siRNA-vta1, siRNA-vta2, siRNA-vta3 and siRNA-vta4) independently and together using the same approach; siRNA-vta1 had the highest silencing efficiency as assessed by colony diameter and quantitative real time PCR (qRT-PCR) analysis. Conclusion: Our quick, easy transformation method can be used to investigate the function of genes involved in growth, virulence and pathogenicity of V. dahliae.

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