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Vicia faba

life science Maturity 5-7 Next article →

The broad bean, known scientifically as *Vicia faba*, is a significant flowering plant.

Fava beans 1
Fava beans 1

It belongs to the Fabaceae family, which includes many common peas and beans. Humans cultivate this species for food and as a cover crop. A cover crop is a plant grown to protect and improve the soil. These plants are very hardy and can survive harsh, cold climates. They can even grow in clay or salty soils. This makes them very useful for farmers around the world.

Structurally, the *Vicia faba* plant is quite distinct. It is an annual plant that grows stiffly upright. It usually has two to four stems that are square in cross-section. The leaves are long and pinnate, meaning they have several leaflets. These leaves have a grey-green color known as glaucous. Unlike many other vetches, this plant does not use tendrils to climb. Instead, it stands on its own. The flowers have five petals and a sweet scent.

Five favas around a quarter (close up)
Five favas around a quarter (close up)

This scent attracts bees and other pollinators to the plant.

The plant produces fruit in the form of broad, leathery pods. These pods start green but turn a dark, blackish-brown as they mature. The surface of the pod is densely downy. In the wild, pods are about 1 cm in diameter. However, modern food varieties have much larger pods, often 2 to 3 cm thick. Each pod contains between three and eight seeds. These seeds are often flattened and can reach 20 to 25 mm in length.

Broad-beans-after-cooking
Broad-beans-after-cooking

They are much larger than the 5 to 10 mm seeds found in wild plants.

History shows that humans have grown these beans for thousands of years. They are among the oldest cultivated plants in the world. Scientists have found charred remains of ancient beans at the el-Wad Terrace. They also found carbonized remains at three Neolithic sites in Israel's Lower Galilee. These sites include Yiftah'el, Ahi'hud, and Nahal Zippori. Based on radiocarbon dating, researchers believe domestication began as early as 8,250 BCE. This long history makes the broad bean a vital part of Old World agriculture.

On a microscopic level, the broad bean has a very complex biology. It is a diploid organism with a chromosome number of 12. This means it has six homologous pairs of chromosomes. The genome of *Vicia faba* is one of the largest among diploid field crops. It contains about 13 GB of DNA. Most of this DNA comes from satellite repeats and retrotransposons. Scientists have predicted that the genome contains 34,221 protein-coding genes. This massive amount of genetic information helps explain the plant's many traits.

While nutritious, the plant faces several biological challenges. It can be attacked by many different pests and diseases. For example, the chocolate spot fungus, *Botrytis fabae*, can cause severe damage. This fungus thrives in high temperature and humidity. It can reduce photosynthesis and lower the amount of beans produced. Other issues include powdery mildew and various bacterial diseases.

Broadbean Yield
Broadbean Yield

Insects like the black bean aphid can also cover large parts of the plant. These pests can reduce the total yield of a field.

Nutrition and safety are also important topics for this plant. Broad beans are very rich in nutrients. They have a high protein-to-carbohydrate ratio compared to lentils or chickpeas. They provide high amounts of folate and minerals like manganese, phosphorus, magnesium, and iron. However, some people must be careful. People with a metabolic disorder called G6PD deficiency may experience favism. This is a serious reaction caused by the alkaloid glycoside vicine found in the beans.

Fried broad beans (china)
Fried broad beans (china)

Fortunately, modern breeding has created low-vicine varieties that are safer to eat.

Globally, the bean is used in many different ways. In the United States, they are often called fava beans. In the United Kingdom and other Commonwealth nations, they are called broad beans. They appear in many regional cuisines. In Egypt, they are a staple used to make ful medames or falafel. In China, they are used to make a spicy paste called doubanjiang.

Whether boiled, steamed, or fried into a snack, they remain a vital food source.

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🖼️ Images & Media (9)
File:Broadbean Yield.png
Broadbean Yield.png
File:Fava beans 1.jpg
Fava beans 1.jpg
File:Broad-beans-after-cooking.jpg
Broad-beans-after-cooking.jpg
File:Five favas around a quarter (close up).jpg
Five favas around a quarter (close up).jpg
File:Fried broad beans (china).jpg
Fried broad beans (china).jpg
File:Fava bean chunks.png
Fava bean chunks.png
File:Traditional Maltese Kusksu (Fava Bean Soup).jpg
Traditional Maltese Kusksu (Fava Bean Soup).jpg
File:Favas à Portuguesa .png
Favas à Portuguesa .png
File:08 Vegan lunch brunch outdoor, broad bean salad - vegan lunch in Stockholm, Sweden.jpg
08 Vegan lunch brunch outdoor, broad bean...
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