A recent study conducted by the University of Florida revealed that storing blood oranges at cool temperatures can enhance their antioxidant properties and other health benefits. However, it is still uncertain if blood oranges could be a profitable crop for Florida citrus growers, as more research is needed to determine if farmers could substantially increase their income by adding them to their crop selection. Blood oranges are rich in anthocyanins, which have been linked to various health benefits such as anti-inflammatory and antioxidant properties, along with other beneficial phytochemicals like vitamin C, flavonoids, and dietary fiber.
Ali Sarkhosh, a UF/IFAS associate professor of horticultural sciences, emphasized that blood oranges can develop internal color at home under similar conditions. However, blood oranges in the supermarket should have good internal color and be ready for consumption. The research was conducted at the UF/IFAS North Florida Research and Education Center in Quincy, where scientists found that storing blood oranges at temperatures between 40 to 53 degrees enhanced their anthocyanin, phenolic content, and antioxidants. Lowering the temperatures to 43 to 46 degrees also preserved the fruit’s firmness, weight loss, and sugar content, important attributes for maintaining overall quality, texture, and taste during storage.
Blood oranges are distinctive for their deep red flesh, which comes from the antioxidant pigment found in their skin. They are commonly grown in countries like Italy and Spain, which have a Mediterranean climate conducive to their growth. In the United States, blood oranges are primarily grown in California but have not been commercially grown in Florida yet. Anthocyanin development in blood oranges occurs when the fruit is exposed to cold temperatures between 46 and 59 degrees for at least 20 days, conditions that are rare in Florida’s subtropical climate.
While blood oranges may command higher prices than other common citrus varieties like navel or Valencia oranges, it remains uncertain if they can be a profitable crop for Florida citrus growers. The study suggests that improved fruit quality resulting from the storage method presents a promising opportunity for the Florida citrus industry but further research is necessary before any recommendations can be made to growers. Understanding the impact of cold storage on blood oranges’ nutrient content and antioxidant properties can help determine the viability of cultivating them commercially in Florida. Ultimately, the potential health benefits and market value of blood oranges could offer a valuable addition to the citrus industry in the state.