Construction and high-throughput phenotypic screening of Zymoseptoria tritici over-expression strains


Targeted gene deletion has been instrumental in elucidating many aspects of Zymoseptoria tritici pathogenicity. Gene over-expression is a complementary approach that is amenable to rapid strain construction and high-throughput screening, which has not been exploited to analyze Z. tritici, largely due to a lack of available techniques. Here we exploit the Gateway® cloning technology for rapid construction of over-expression vectors and improved homologous integration efficiency of a Z. tritici Δku70 strain to build a pilot over-expression library encompassing 32 genes encoding putative DNA binding proteins, GTPases or kinases. We developed a protocol using a Rotor-HDA robot for rapid and reproducible cell pinning for high-throughput in vitro screening. This screen identified an over-expression strain that demonstrated a marked reduction in hyphal production relative to the isogenic progenitor. This study provides a protocol for rapid generation of Z. tritici over-expression libraries and a technique for functional genomic screening in this important pathogen.

DOI: 10.1016/j.fgb.2015.04.013

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@inproceedings{Cairns2015ConstructionAH, title={Construction and high-throughput phenotypic screening of Zymoseptoria tritici over-expression strains}, author={T L Cairns and Y S Sidhu and Y K Chaudhari and N. J. Talbot and D. Studholme and Ken Haynes}, booktitle={Fungal genetics and biology : FG & B}, year={2015} }