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One of the major intent of metabolic engineering in cell culture systems is to increase yields of secondary metabolites. Efficient transformation methods are a priority to successfully apply metabolic engineering to cell cultures of plants that produce bioactive or therapeutic compounds, such as Vitis vinifera and Taxus x media. The aim of this study was to establish a reliable method to transform non-embryogenic cell cultures of these species. The V. vinifera cv. Gamay/cv. Monastrell cell lines and Taxus x media were used for Agrobacterium-mediated transformation using the Gateway-compatible Agrobacterium sp. binary vector system for fast reliable DNA cloning. The Taxus x media and Vitis cell lines were maintained in culture for more than 4 and 15 months, respectively, with no loss of reporter gene expression or antibiotic resistance. The introduced genes had no discernible effect on cell growth, or led to extracellular accumulation of phytoalexin trans-Resveratrol (t-R) in response to elicitation with methylated cyclodextrins (MBCD) and methyl jasmonate (MeJA) in the grapevine transgenic cell lines compared to the parental control. The method described herein provides an excellent tool to exploit exponentially growing genomic resources to enhance, optimize or diversify the production of bioactive compounds generated by grapevine and yew cell cultures, and offers a better understanding of many grapevine and yew biology areas.

A reliable protocol for the stable transformation of non-embryogenic cells cultures of grapevine (Vitis vinifera L.) and Taxus x media