Buckwheat | |
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Scientific classification | |
Kingdom: | Plantae |
Clade: | Tracheophytes |
Clade: | Angiosperms |
Clade: | Eudicots |
Order: | Caryophyllales |
Family: | Polygonaceae |
Genus: | Fagopyrum |
Species: | F. esculentum |
Binomial name | |
Fagopyrum esculentum | |
Synonyms [1] | |
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Buckwheat (Fagopyrum esculentum) or common buckwheat [2] [3] is a flowering plant in the knotweed family Polygonaceae cultivated for its grain-like seeds and as a cover crop. Buckwheat originated around the 6th millennium BCE in the region of what is now Yunnan Province in southwestern China. The name "buckwheat" is used for several other species, such as Fagopyrum tataricum , a domesticated food plant raised in Asia.
Despite its name, buckwheat is not closely related to wheat. Buckwheat is not a cereal, nor is it even a member of the grass family. It is related to sorrel, knotweed, and rhubarb. Buckwheat is considered a pseudocereal, because its seeds' high starch content allows them to be used in cooking like a cereal.
The name "buckwheat" or "beech wheat" comes from its tetrahedral seeds, which resemble the much larger seeds of the beech nut from the beech tree, and the fact that it is used like wheat. The word may be a translation of Middle Dutch boecweite: boec "beech" (Modern Dutch beuk; see PIE *bhago-) and weite "wheat" (Mod. Dut. tarwe, antiquated weit), or maybe a native formation on the same model as the Dutch word. [4]
Buckwheat is a herbaceous annual flowering plant growing to about 60 centimetres (24 in), with red stems and pink and white flowers resembling those of knotweeds. [5] : 68 The leaves are arrow-shaped and the fruits are achenes about 5–7 mm with 3 prominent sharp angles. [6] : 94
Fagopyrum esculentum is native to south-central China and Tibet, [7] and has been introduced into suitable climates across Eurasia, Africa and the Americas. [7]
The wild ancestor of common buckwheat is F. esculentum ssp. ancestrale. F. homotropicum is interfertile with F. esculentum and the wild forms have a common distribution, in Yunnan, a southwestern province of China. The wild ancestor of tartary buckwheat is F. tataricum ssp. potanini. [8]
Common buckwheat was domesticated and first cultivated in inland Southeast Asia, possibly around 6000 BCE, and from there spread to Central Asia and Tibet, and then to the Middle East and Europe, which it reached by the 15th century. [9] Domestication most likely took place in the western Yunnan region of China. [10]
The oldest remains found in China so far date to circa 2600 BCE, while buckwheat pollen found in Japan dates from as early as 4000 BCE. It is the world's highest-elevation domesticate, being cultivated in Yunnan on the edge of the Tibetan Plateau or on the plateau itself. Buckwheat was one of the earliest crops introduced by Europeans to North America. Dispersal around the globe was complete by 2006, when a variety developed in Canada was widely planted in China. In India, buckwheat flour is known as kuttu ka atta and has long been culturally associated with many festivals like Shivratri, Navaratri and Janmashtami. On the day of these festivals, food items made only from buckwheat are consumed. [11]
Buckwheat is a short-season crop that grows well in low-fertility or acidic soils; too much fertilizer – especially nitrogen – reduces yields, and the soil must be well drained. In hot climates buckwheat can be grown only by sowing late in the season, so that it blooms in cooler weather. The presence of pollinators greatly increases yield. [12] Nectar from flowering buckwheat produces a dark-colored honey. [13]
The buckwheat plant has a branching root system with a primary taproot that reaches deeply into moist soil. [14] It grows 75 to 125 centimetres (30 to 50 inches) tall. [15] Buckwheat has tetrahedral seeds and produces a flower that is usually white, although can also be pink or yellow. [16] Buckwheat branches freely, as opposed to tillering or producing suckers, enabling more complete adaption to its environment than other cereal crops. [14]
Buckwheat is raised for grain only where a brief time is available for growth, either because the buckwheat is an early or a second crop in the season, or because the total growing season is limited. It establishes quickly, which suppresses summer weeds, and can be a reliable cover crop in summer to fit a small slot of warm season. [15] Buckwheat has a growing period of only 10–12 weeks [17] and it can be grown in high latitude or northern areas. [18] Buckwheat is sometimes used as a green manure, as a plant for erosion control or as wildlife cover and feed. [15]
In 2022, world production of buckwheat was 2.2 million tonnes, led by Russia with 55% of the world total, followed by China with 23% and Ukraine with 7%. [19]
Country | Production (tonnes) |
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Russia | 1,222,382 |
China | 506,440 |
Ukraine | 147,690 |
Kazakhstan | 89,803 |
United States | 85,305 |
Brazil | 64,376 |
Total: | 2,235,193 |
Source: FAOSTAT of the United Nations [19] |
F. esculentum is often studied and used as a pollen and nectar source to increase natural predator numbers to control crop pests. [20] Berndt et al. 2002 found that the results were not entirely promising in one vineyard in New Zealand [21] [22] [23] but the same team - Berndt et al. 2006, four years later and studying a number of vineyards up and down New Zealand - did find a significant increase in 22 parasitoids, especially Dolichogenidea tasmanica , [23] as did Irvin et al. 1999 for D. t. in Canterbury orchards. [24] Gurr et al. 1998 showed that floral nectaries - and not shelter in or alternate hosts on F. esculentum - were responsible for this increase, and Stephens et al. 1998 for Anacharis spp. on Micromus tasmaniae . Stephens et al. 1998 also first demonstrated a great increase of A. spp. on M. t. (which also commonly predates on F. e.). [24] Cullen et al. 2013 found that vineyards around Waipara had not continued planting buckwheat, suggesting a need for further technique development so that buckwheat will integrate well with real-world vineyard practice. [23] English-Loeb et al. 2003 found that it does sustain greater numbers of Anagrus parasitoids on Erythroneura leafhoppers, [23] and Balzan and Wäckers 2013 found the same for Necremnus artynes and Ferracini et al. 2012 for Necremnus tutae on Tuta absoluta , and thereby act as pest controls in tomato, potato, and to a lesser degree other Solanaceous and non-Solanaceous horticulturals. [25] Kalinova and Moudry 2003 found that further companion planting with other flowers at the wrong time of year may actually cause F. esculentum to be killed by frosts it would have otherwise survived, and Colley and Luna 2000 found that it may delay its flowering to not coincide with the natural enemy it was planted to feed. [20] Foti et al. 2016 found significant short-chain carboxylic acid variation to be the most likely explanation for biocontrol performance variation between cultivars. [20]
Buckwheat contains diverse phytochemicals, including rutin, tannins, catechin-7-O-glucoside in groats, [26] [27] and fagopyrins, [28] [29] [30] which are located mainly in the cotyledons of the buckwheat plant. [31] It has almost no levels of inorganic arsenic. [32]
Salicylaldehyde (2-hydroxybenzaldehyde) was identified as a characteristic component of buckwheat aroma. [33] 2,5-dimethyl-4-hydroxy-3(2H)-furanone, (E,E)-2,4-decadienal, phenylacetaldehyde, 2-methoxy-4-vinylphenol, (E)-2-nonenal, decanal and hexanal also contribute to its aroma. They all have odour activity value of more than 50, but the aroma of these substances in an isolated state does not resemble buckwheat. [34]
Nutritional value per 100 g (3.5 oz) | |||||||||||||||||||||||||||||||||||||||||||||||
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Energy | 1,435 kJ (343 kcal) | ||||||||||||||||||||||||||||||||||||||||||||||
71.5 g | |||||||||||||||||||||||||||||||||||||||||||||||
Dietary fiber | 10 g | ||||||||||||||||||||||||||||||||||||||||||||||
3.4 g | |||||||||||||||||||||||||||||||||||||||||||||||
Saturated | 0.741 g | ||||||||||||||||||||||||||||||||||||||||||||||
Monounsaturated | 1.04 g | ||||||||||||||||||||||||||||||||||||||||||||||
Polyunsaturated | 1.039 g 0.078 g 0.961 g | ||||||||||||||||||||||||||||||||||||||||||||||
13.25 g | |||||||||||||||||||||||||||||||||||||||||||||||
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Other constituents | Quantity | ||||||||||||||||||||||||||||||||||||||||||||||
Water | 9.8 g | ||||||||||||||||||||||||||||||||||||||||||||||
"Link to database entry". Food Details. USDA. 170286. | |||||||||||||||||||||||||||||||||||||||||||||||
†Percentages estimated using US recommendations for adults, [35] except for potassium, which is estimated based on expert recommendation from the National Academies. [36] |
With a 100-gram serving of dry buckwheat providing 1,440 kilojoules (343 kilocalories) of food energy, or 380 kJ (92 kcal) cooked, buckwheat is a rich source (20% or more of the Daily Value, DV) of protein, dietary fiber, four B vitamins and several dietary minerals, with content especially high (47 to 65% DV) in niacin, magnesium, manganese and phosphorus (table). Buckwheat is 72% carbohydrates, 10% dietary fiber, 3% fat, 13% protein, and 10% water.
As buckwheat contains no gluten, it may be eaten by people with gluten-related disorders, such as celiac disease, non-celiac gluten sensitivity or dermatitis herpetiformis. [37] [38] Nevertheless, buckwheat products may have gluten contamination. [37]
Cases of severe allergic reactions to buckwheat and buckwheat-containing products have been reported. [39] Buckwheat contains fluorescent phototoxic fagopyrins. [28] Seeds, flour, and teas are generally safe when consumed in normal amounts,[ quantify ] but fagopyrism can appear in people with diets based on high consumption of buckwheat sprouts, and particularly flowers or fagopyrin-rich buckwheat extracts. [40] Symptoms of fagopyrism in humans may include skin inflammation in sunlight-exposed areas, cold sensitivity, and tingling or numbness in the hands. [40]
This section needs additional citations for verification .(December 2015) |
The fruit is an achene, similar to sunflower seed, with a single seed inside a hard outer hull. The starchy endosperm is white and makes up most or all of buckwheat flour. The seed coat is green or tan, which darkens buckwheat flour. The hull is dark brown or black, and some may be included in buckwheat flour as dark specks. The dark flour is known as blé noir (black wheat) in French, along with the name sarrasin (saracen). Similarly, in Italy, it is known as grano saraceno (saracen grain). [41] The grain can be prepared by simple dehulling, milling into farina, to whole-grain flour or to white flour. The grain can be fractionated into starch, germ and hull for specialized uses.
Buckwheat groats are commonly used in western Asia and eastern Europe. The porridge was common, and is often considered the definitive peasant dish. It is made from roasted groats that are cooked with broth to a texture similar to rice or bulgur. The dish was taken to America by Jewish, Ukrainian, Russian, and Polish immigrants who called it kasha , as it is known today, who mixed it with pasta or used it as a filling for cabbage rolls (stuffed cabbage), knishes, and blintzes. Groats were the most widely used form of buckwheat worldwide during the 20th century, eaten primarily in Estonia, Latvia, Lithuania, Russia, Ukraine, Belarus, and Poland, called grechka (Greek [grain]) in Belarusian, Ukrainian and Russian languages.
Buckwheat noodles have been eaten in Tibet and northern China for centuries, where the growing season is too short to raise wheat. A wooden press is used to press the dough into hot boiling water when making buckwheat noodles. Old presses found in Tibet and Shanxi share the same basic design features. The Japanese and Koreans may have learned the process of making buckwheat noodles from them.
Buckwheat noodles play a major role in the cuisines of Japan ( soba ) [42] and Korea ( naengmyeon , makguksu and memil guksu). Soba noodles are the subject of deep cultural importance in Japan. The difficulty of making noodles from flour with no gluten has resulted in a traditional art developed around their manufacture by hand. A jelly called memilmuk in Korea is made from buckwheat starch.
Noodles also appear in Italy, with pasta di grano saraceno in Apulia region of Southern Italy and pizzoccheri in the Valtellina region of Northern Italy.
Buckwheat pancakes are eaten in several countries. They are known as buckwheat blini in Russia, galettes bretonnes in France, ployes in Acadia, poffertjes in the Netherlands, boûketes in the Wallonia region of Belgium, kuttu ki puri in India and kachhyamba in Nepal. Similar pancakes were a common food in American pioneer days. [43] They are light and airy when baked. The buckwheat flour gives the pancakes an earthy, mildly mushroom-like taste.
Yeasted patties called hrechanyky are made in Ukraine.
Buckwheat is a permitted sustenance during fasting in several traditions. In India, on Hindu fasting days (Navaratri, Ekadashi, Janmashtami, Maha Shivaratri, etc.), fasting people in northern states of India eat foods made of buckwheat flour. Eating cereals such as wheat or rice is prohibited during such fasting days. While strict Hindus do not even drink water during their fast, others give up cereals and salt and instead eat non-cereal foods such as buckwheat (kuttu). In the Russian Orthodox tradition, it is eaten on the St. Philip fast. [44]
Buckwheat honey is dark, strong and aromatic. Because it does not complement other honeys, it is normally produced as a monofloral honey.
In recent years, buckwheat has been used as a substitute for other grains in gluten-free beer. Although it is not an actual cereal (being a pseudocereal), buckwheat can be used in the same way as barley to produce a malt that can form the basis of a mash that will brew a beer without gliadin or hordein (together gluten) and therefore can be suitable for coeliacs or others sensitive to certain glycoproteins. [45]
Buckwheat whisky is a type of distilled alcoholic beverage made entirely or principally from buckwheat. It is produced in the Brittany region of France and in the United States.
Buckwheat shōchū (焼酎) is a Japanese distilled beverage produced since the 16th Century. The taste is milder than barley shōchū.[ citation needed ]
Buckwheat tea, known as kuqiao-cha (苦荞茶) in China, memil-cha (메밀차) in Korea and soba-cha (蕎麦茶) in Japan, is a tea made from roasted buckwheat. [46]
Buckwheat hulls are used as filling for a variety of upholstered goods, including pillows. The hulls are durable and do not insulate or reflect heat as much as synthetic filling. They are sometimes marketed as an alternative natural filling to feathers for those with allergies. However, medical studies to measure the health effects of pillows manufactured with unprocessed and uncleaned hulls concluded that such buckwheat pillows do contain higher levels of a potential allergen that may trigger asthma in susceptible individuals than do new synthetic-filled pillows. [47] [48]
Pasta is a type of food typically made from an unleavened dough of wheat flour mixed with water or eggs, and formed into sheets or other shapes, then cooked by boiling or baking. Pasta was originally only made with durum, although the definition has been expanded to include alternatives for a gluten-free diet, such as rice flour, or legumes such as beans or lentils. Pasta is believed to have developed independently in Italy and is a staple food of Italian cuisine, with evidence of Etruscans making pasta as early as 400 BCE in Italy.
Wheat is a group of wild and domesticated grasses of the genus Triticum. They are cultivated for their cereal grains, which are staple foods around the world. Well-known wheat species and hybrids include the most widely grown common wheat, spelt, durum, emmer, einkorn, and Khorasan or Kamut. The archaeological record suggests that wheat was first cultivated in the regions of the Fertile Crescent around 9600 BC.
Millets are a highly varied group of small-seeded grasses, widely grown around the world as cereal crops or grains for fodder and human food. Most millets belong to the tribe Paniceae.
Panicum miliaceum is a grain crop with many common names, including proso millet, broomcorn millet, common millet, hog millet, Kashfi millet, red millet, and white millet. Archaeobotanical evidence suggests millet was first domesticated about 10,000 BP in Northern China. Major cultivated areas include Northern China, Himachal Pradesh of India, Nepal, Russia, Ukraine, Belarus, the Middle East, Turkey, Romania, and the Great Plains states of the United States. About 500,000 acres are grown each year. The crop is notable both for its extremely short lifecycle, with some varieties producing grain only 60 days after planting, and its low water requirements, producing grain more efficiently per unit of moisture than any other grain species tested. The name "proso millet" comes from the pan-Slavic general and generic name for millet.
Flour is a powder made by grinding raw grains, roots, beans, nuts, or seeds. Flours are used to make many different foods. Cereal flour, particularly wheat flour, is the main ingredient of bread, which is a staple food for many cultures. Corn flour has been important in Mesoamerican cuisine since ancient times and remains a staple in the Americas. Rye flour is a constituent of bread in both Central Europe and Northern Europe.
Spelt, also known as dinkel wheat is a species of wheat. It is a relict crop, eaten in Central Europe and northern Spain. It is high in protein and may be considered a health food.
The genus Fagopyrum is in the flowering plant family Polygonaceae. It includes some important food plants, such as F. esculentum (buckwheat) and F. tataricum. The genus is native to the Indian subcontinent, much of Indochina, and central and southeastern China. Species have been widely introduced elsewhere, throughout the Holarctic and parts of Africa and South America.
Groats are the hulled kernels of various cereal grains, such as oats, wheat, rye, and barley. Groats are whole grains that include the cereal germ and fiber-rich bran portion of the grain, as well as the endosperm.
Fagopyrum tataricum, also known as Tartary buckwheat, green buckwheat, ku qiao, Tatar buckwheat, or bitter buckwheat, is a domesticated food plant in the genus Fagopyrum in the family Polygonaceae. With another species in the same genus, common buckwheat, it is often counted as a cereal, but the buckwheats are not closely related to true cereals.
Rutin is the glycoside combining the flavonol quercetin and the disaccharide rutinose. It is a flavonoid glycoside found in a wide variety of plants, including citrus.
Wheat allergy is an allergy to wheat that typically presents as a food allergy, but can also be a contact allergy resulting from occupational exposure. The exact mechanism of this allergy is not yet clear. Wheat allergy may be immunoglobulin E-mediated or not, and may involve a mast cell response. Wheat allergy is rare - prevalence in adults was estimated to be 0.21% in a 2012 study in Japan.
2-Nonenal is an unsaturated aldehyde. The colorless liquid is an important aroma component of aged beer and buckwheat, and is insoluble in water.
Decanal is an organic compound with the chemical formula CH3(CH2)8CHO. A colorless oil, it is classified as an aldehyde.
Furaneol, or strawberry furanone, is an organic compound used in the flavor and perfume industry. It is formally a derivative of furan. It is a white or colorless solid that is soluble in water and organic solvents.
(E,E)-2,4-Decadienal is an aromatic substance found in butter, cooked beef, fish, potato chips, roasted peanut, buckwheat and wheat bread crumb. In an isolated state, it smells of deep fat flavor, characteristic of chicken aroma (at 10ppm). At lower concentration, it has the odor of citrus, orange or grapefruit. It might be carcinogenic. It has been used as aroma in the EU, but use restrictions apply until the required data have been submitted.
Phenylacetaldehyde is an organic compound used in the synthesis of fragrances and polymers. Phenylacetaldehyde is an aldehyde that consists of acetaldehyde bearing a phenyl substituent; the parent member of the phenylacetaldehyde class of compounds. It has a role as a human metabolite, a Saccharomyces cerevisiae metabolite, an Escherichia coli metabolite and a mouse metabolite. It is an alpha-CH2-containing aldehyde and a member of phenylacetaldehydes.
2-Methoxy-4-vinylphenol is an aromatic substance used as a flavoring agent. It is one of the compounds responsible for the natural aroma of buckwheat.
Fagopyrin is a term used for several closely related naturally occurring substances in the buckwheat plant. Their chemical structure contains a naphthodianthrone skeleton similar to that of hypericin.
A grain is a small, hard, dry fruit (caryopsis) – with or without an attached hull layer – harvested for human or animal consumption. A grain crop is a grain-producing plant. The two main types of commercial grain crops are cereals and legumes.