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Açaí palm

life science Maturity 5-7 Next article →

The açaí palm, known scientifically as Euterpe oleracea, is a vital species of palm tree from the Arecaceae family.

Acai Rio 20070416
Acai Rio 20070416

This tall, slender tree is native to eastern Amazonia, particularly within the swamps and floodplains of Brazil. It is highly valued because almost every part of the plant can be used by humans. People cultivate these palms for their fruit, known as açaí berries, as well as their hearts of palm, leaves, and trunk wood. While the fruit has been a dietary staple for local floodplain populations since the 18th century, its global popularity surged in the 1990s. Today, it is recognized worldwide as a popular health food and ingredient.

The structure of the açaí berry is quite unique compared to many other fruits. It is classified as a drupe, which is a fruit with a hard pit or stone in the center. The fruit is small, round, and dark purple, appearing somewhat like a small grape. It consists of a thin, pulpy layer called the mesocarp that surrounds a hard endocarp. Inside this endocarp lies a single, large seed that can be about 5 mm in diameter. Interestingly, this seed is the most substantial part of the fruit, making up between 60% and 80% of its total mass.

Acai Rio 20070416
Acai Rio 20070416

Cultivation of the açaí palm follows specific seasonal patterns. Although the trees bear fruit throughout the entire year, harvesting is restricted by the weather. Workers cannot harvest the berries during the rainy season. There are generally two distinct harvest periods throughout the year. The first harvest typically occurs between January and June. The second harvest happens between August and December and usually produces larger volumes of fruit. This seasonal cycle is essential for managing the supply of berries for both local and global markets.

There are different varieties, or cultivars, of the açaí palm. One rare variety is called Branco, which means "White" in Portuguese. This cultivar is found near the Amazon estuary. Unlike most açaí, Branco berries do not change color and remain green even when they are ripe. Scientists believe this trait is caused by a recessive gene, as only about 30% of Branco seeds will actually express this color. Other varieties have been developed by the Brazilian Agricultural Research Agency, such as BRS-Pará, released in 2004, and the newer BRS Pai d'Égua. These developed varieties help manage the pulp yield, which typically ranges from 15% to 25%.

The economic impact of açaí is massive, especially in the state of Pará. This single state accounts for 90% of Brazil's total açaí economy. In 2022, Pará produced 150,000 tons of berries, generating US$26 million in revenue. This production level was a staggering 209 times greater than the volume produced in 2012.

Banca de açai na rua Belem
Banca de açai na rua Belem

However, the industry faces challenges regarding labor. In the rainforest, children as young as 13 are sometimes employed to clear paths or climb trees up to 30 meters tall. These workers often climb without harnesses, which can lead to serious falls and injuries.

Nutritionally, açaí is complex and has been the subject of much scientific study. A freeze-dried powder of the fruit and skin contains significant amounts of carbohydrates, protein, and fats. For example, 100 grams of dry powder provides 534 calories and 52 grams of carbohydrates. The fats include oleic acid, palmitic acid, and linoleic acid. The fruit is also rich in anthocyanins, which are pigments that provide the dark blue color.

Acai oil
Acai oil

While these compounds show antioxidant activity in laboratory settings, studies suggest they may be poorly absorbed by the human body. Because of this, some health claims made by marketers have been challenged by scientific organizations.

Beyond food, the açaí palm is deeply connected to many different industries. The oil extracted from the fruit is used in cosmetics like shampoos, soaps, and moisturizers. The leaves are woven into useful items such as hats, mats, baskets, and even roof thatch for homes. Even the heavy trunk wood is used in construction because it is resistant to pests.

Acai oil
Acai oil

Even the large seeds, which might otherwise be waste, can be ground up for livestock food or used as organic soil for plants. This makes the açaí palm a remarkably efficient and multi-purpose resource for the Amazonian ecosystem.

Açaí
Açaí
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