Some gardeners grow tomatoes in a rainbow of colours including red, yellow, orange, green and even burgundy. But purple? The United States Department of Agriculture (USDA) last month signed off on ...

Martin identified the snapdragon flower gene that activated the purple color. She then put the gene into bacteria. Tomatoes could absorb foreign genetic material and express this new gene.

Some gardeners grow tomatoes in a rainbow of colours including red, yellow, orange, green and even burgundy. But purple? The United States Department of Agriculture (USDA) last month signed off on ...

Purple tomatoes are a new entrant in the veggie world, offering unique flavors and colors from anthocyanin. These tomatoes ...