Асаи пальмасы: пайдалы жемісі мен шаруашылық маңызы

Palm tree with many uses, mainly fruit as cash crop

The açaí palm (/ə/'/s//aɪ//.//iː/, asaˈi, from Nheengatu asai), Euterpe oleracea, is a species of palm tree (Arecaceae) cultivated for its fruit (açaí berries, or simply açaí), hearts of palm (a vegetable), leaves, and trunk wood. Global demand for the fruit has expanded rapidly in the 21st century, and the tree is cultivated for that purpose primarily. The species is native to eastern Amazonia, especially in Brazil, mainly in swamps and floodplains. Açaí palms are tall, slender trees growing to more than tall, with pinnate leaves up to long. The fruit is small, round, and black purple in color. The fruit became a staple food in floodplain areas around the 18th century, but its consumption in urban areas and promotion as a health food only began in the mid 1990s along with the popularization of other Amazonian fruits outside the region. The importance of the fruit as a staple food in the Amazon River delta gives rise to the local legend of how the plant got its name. The folklore says that chief Itaqui ordered all newborns put to death owing to a period of famine. When his own daughter gave birth and the child was sacrificed, she cried and died beneath a newly sprouted tree. The tree fed the tribe and was called açaí because that was the daughter's name (Iaçá) spelled backwards. Its specific epithet oleracea means "vegetable" in Latin and is a form of holeraceus (oleraceus).

The fruit, commonly known as açaí or açaí berry, is a small, round, black purple drupe about in circumference, similar in appearance to a grape, but smaller and with less pulp and produced in branched panicles of 500 to 900 fruits. The exocarp of the ripe fruits is a deep purple color, or green, depending on the kind of açaí and its maturity. The mesocarp is pulpy and thin, with a consistent thickness of or less. It surrounds the voluminous and hard endocarp, which contains a single large seed about in diameter. The seed makes up about 60–80% of the fruit. The palm bears fruit year round but the berry cannot be harvested during the rainy season.

There are two harvests: one is normally between January and June, while the other is between August and December, producing larger volumes. In 2022, the state of Pará, which accounts for 90% of Brazil's total açaí economy, produced of açaí berries, generating US$26 million in revenue. The 2022 production was 209 times greater than the volume produced in 2012. BRS Pará was developed in 2004 by the Brazilian Agricultural Research Agency. The pulp yield ranges from 15% to 25%. BRS Pai d'Égua is the newest cultivar developed by the Brazilian Agricultural Research Agency.

Anthocyanins define the blue pigmentation of açaí and the antioxidant capacity of the plant's natural defense mechanisms and in laboratory experiments in vitro. Anthocyanins in açaí accounted for only about 10% of the overall antioxidant capacity in vitro. The Linus Pauling Institute and European Food Safety Authority state that "the relative contribution of dietary flavonoids to ( ) antioxidant function in vivo is likely to be very small or negligible". Unlike in controlled test tube conditions, anthocyanins have been shown to be poorly conserved (less than 5%) in vivo, and most of what is absorbed exists as chemically modified metabolites destined for rapid excretion. A powdered preparation of freeze dried açaí fruit pulp and skin was shown to contain cyanidin 3 O glucoside and cyanidin 3 O rutinoside as major anthocyanins (3.19 mg/g). The powdered preparation was also reported to contain twelve flavonoid like compounds, including homoorientin, orientin, taxifolin deoxyhexose, isovitexin, scoparin, as well as proanthocyanidins (12.89 mg/g), and low levels of resveratrol (1.1 μg/g). The powder was also shown to contain (per 100 g) negligible vitamin C, 260 mg calcium, 4 mg iron, and 1002 IU vitamin A. In 2003, American celebrity doctor Nicholas Perricone included açaí berries among "superfoods", but such extravagant marketing claims regarding açaí as miracle cures for everything from obesity to attention deficit disorder were challenged in subsequent studies. The FTC handed down an $80 million judgement in January 2012 against five companies that were marketing açaí berry supplements with fraudulent claims that their products promoted weight loss and prevented colon cancer. One company, Central Coast Nutraceuticals, was ordered to pay a $1.5 million settlement.

Brazil is a major producer, particularly in the state of Pará, which alone in 2019 produced more than 1.2 million tons of açaí, an amount equal to 95% of Brazil's total.

Fresh açaí has been consumed as a dietary staple in the region around the Amazon river delta for centuries. The fruit is processed into pulp for supply to food product manufacturers or retailers, sold as frozen pulp, juice, or an ingredient in various products from beverages, including grain alcohol, smoothies, foods, cosmetics and supplements. Açaí na tigela (known in English as açaí bowl) is a Brazilian dessert made from frozen açaí berry purée, served in a bowl and topped with other fruit and granola.

As of 2008, no açaí products have been evaluated by the FDA, and their efficacy is doubtful. As of 2009, there is no scientific evidence that açaí consumption affects body weight, promotes weight loss or has any positive health effect.

Açaí oil is suitable for cooking or as a salad dressing, but is mainly used in cosmetics as shampoos, soaps or skin moisturizers. Although these compounds are under study for potential health effects, there remains no substantial evidence that açaí polyphenols have any effect in humans.

Leaves of the palm may be made into hats, mats, baskets, brooms and roof thatch for homes, and trunk wood, resistant to pests, for building construction. Tree trunks may be processed to yield dietary minerals. Comprising 80% of the fruit mass, açaí seeds may be ground for livestock food or as a component of organic soil for plants. Planted seeds are used for new palm tree stock, which, under the right growing conditions, can require months to form seedlings. Seeds may become waste in landfills or used as fuel for producing bricks.

Orally administered açaí has been tested as a contrast agent for magnetic resonance imaging (MRI) of the gastrointestinal system. Its anthocyanins have also been characterized for stability as a natural food coloring agent.