| Summary: | Abstract Background Green plants comprise two lineages: (1) the streptophytes that colonised land and (2) the chlorophytes that have adaptations to land but remained mostly aquatic. To better understand what made streptophytes so successful, we are currently establishing the chlorophyte alga Draparnaldia sp. (Chaetophorales, Chlorophyceae) as a model for comparative analyses between these two lineages. However, establishing Draparnaldia as a valuable model requires that it can be transformed. Thus, our goal is to develop a transformation protocol for this alga. Results We have established the first transformation protocol for Draparnaldia. This protocol is based on protoplast transformation by electroporation. It includes instructions on protoplast isolation, regeneration and transient transfection. It also provides a list of the effective selective agents for future Draparnaldia transformations. Conclusions Our protocol opens a way for Draparnaldia functional genomics analyses. Moreover, it also provides an important base for establishment of stable transformation.
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