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Beetroot

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Beetroot, also known as the beet, is a root vegetable belonging to the Conditiva Group. It is the edible taproot portion of the plant *Beta vulgaris subsp. vulgaris*. This plant is highly valued because both its deep purple roots and its green leaves are edible. The leaves are often categorized as a separate leaf vegetable called beet greens. Beetroot is native to several regions, including the Azores, India, and Western Europe to the Mediterranean. Because it is so versatile, it is known by many names, such as table beet, garden beet, or dinner beet.

The growth of a beetroot plant follows a specific biological timeline. It typically requires 55 to 65 days from germination to reach a harvestable root size. However, the green leaves can be harvested much earlier than the taproot. During its growth, the plant absorbs various substances from the earth. One significant substance is nitrate, which the plant accumulates from the soil. While an appropriate amount of nitrate in beetroot juice can help lower blood pressure, excessive levels can pose health risks. This is because nitrates can be converted into nitrosamine in the human stomach.

Scientists and food producers have found ways to manage the chemistry of the plant. To safely remove excess nitrates, certain bacteria can be used. The bacterium *Paracoccus denitrificans* can break down nitrates, though it creates an intermediate called nitrite. To prevent the formation of harmful nitrosamines during this process, ascorbic acid can be added. In industrial settings involving concentrated beet juice, specialists use halophilic bacteria. The species *Nesterenkonia halobia* is considered the most efficient for this task due to the high osmotic concentration of the juice.

Human history with the beetroot is very long. The domestication of the plant likely began when a specific allele emerged. This genetic change allowed for the biennial harvesting of both leaves and taproots. Originally, the plant was domesticated in the ancient Middle East. Early civilizations, including the Ancient Egyptians, Greeks, and Romans, grew the plant primarily for its greens. It was not until the Roman era that people began cultivating the roots for food.

Throughout the Middle Ages, beetroot played a role in traditional medicine. It was used to treat various conditions, particularly those involving the blood and digestion. In the 17th century, beetroot juice was even used as a way to color wine. During World War II, beetroot became a staple in many "victory gardens." Beyond food, the plant served as a biological tool. It acted as an indicator of soil pH, as healthy growth signaled that the soil acidity was not too strong.

Culinary traditions involving beetroot vary greatly across the globe. In Eastern Europe, beetroot is the star of famous soups like Ukrainian borscht or Polish barszcz czerwony. In Ukraine, a thicker stew called shpundra is often made with pork ribs. In Poland and Ukraine, the vegetable is mixed with horseradish to create a condiment called ćwikła. Other unique preparations include the Lithuanian cold soup ŝaltibarščiai, which contains kefir and cucumber. In Australia and New Zealand, sliced pickled beetroot is a standard ingredient in hamburgers.

The plant's vibrant color is caused by a pigment called betanin. Betanin is a type of betalain known as a betacyanin. This pigment is so strong that it is used industrially to color many foods. It enhances the appearance of tomato paste, jams, jellies, ice cream, and even breakfast cereals. Betanin is very stable in foods with low water content, such as fruit fillings. Interestingly, betanin is not broken down by the human body. It is simply excreted in urine and stools. This can sometimes cause a harmless condition called beeturia, where urine or stools appear reddish.

Beetroot is part of a larger family of related plants. While the beetroot is the most common, other cultivars of the same subspecies exist. The sugar beet is another important variety. There is also the spinach beet, which is commonly known as Swiss chard. Finally, the mangelwurzel is grown as a fodder crop for animals. These different varieties show how one plant species can serve many different human needs, from food to fuel to medicine.

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