[Plant scientist Cathie] Martin and her colleagues at the John Innes Centre in the UK were aiming to make a tomato high in anthocyanin, an antioxidant-rich pigment found in blackberries and blueberries. The team engineered the jewel tone by adding two genes from the snapdragon flower, which act like a switch to turn on the production of anthocyanins. Over the years, Martin and her team have crossed their purple tomatoes with other breeds to make them bigger—and tastier—than the micro variety they initially grew.
Now, the United States Department of Agriculture has decided that their purple tomato can be grown and cultivated in the US. On September 7, the agency issued a statement saying the tomato is “unlikely to pose an increased plant pest risk compared to other cultivated tomatoes” and is not subject to regulation. (This is the main criteria the agency uses to determine whether crops made using biotechnology should be regulated.) Norfolk Plant Sciences, a company cofounded by Martin, plans to roll out a purple cherry tomato in a handful of test markets in 2023. The biotech firm is also working on purple tomato juice, sun-dried tomatoes, and beefsteak tomatoes, and plans to sell seeds for backyard gardeners. “We hope people will eventually grow their own,” says Martin.
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Nathan Pumplin, president and CEO of Norfolk Healthy Produce, the US arm of Norfolk Plant Sciences that will commercialize the product, is very aware that a large segment of consumers may reject the purple tomato. But he’s hoping to connect with those who are more open to eating them. He says the company plans to first introduce their purple tomato at farmers markets. “It’s a place where growers get to directly interact with consumers, and consumers can ask: ‘What is this new vegetable? How was it grown? Where did it come from?’”