Ripening and color development in tomatoes is governed primarily by two factors: temperature and the presence of a naturally occurring hormone called “ethylene.” The optimum temperature range for ...

The plant gets its color — and a boost in antioxidants — from genes from an edible flower. It's the first time a genetically modified crop is marketed directly to gardeners to raise at home ...

The new Oregon State University-developed tomato Midnight Roma follows in the steps of 10-year-old Indigo Rose, the first antioxidant-rich purple tomato available on the market.