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Tamarind

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Tamarind
Scientific classificationEdit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Fabales
Family: Fabaceae
Subfamily: Detarioideae
Tribe: Amherstieae
Genus: Tamarindus
L.
Species:
T. indica
Binomial name
Tamarindus indica
L. 1753
Synonyms[3][4][5]
  • CavaraeaSpeg. 1916
  • Cavaraea elegansSpeg. 1916[2]
  • Tamarindus erythraeusMattei 1908
  • Tamarindus occidentalisGaertn. 1791
  • Tamarindus officinalisHook. 1851
  • Tamarindus somalensisMatteqi 1908
  • Tamarindus umbrosaSalisb. 1796

Tamarind(Tamarindus indica) is aleguminoustree bearing edible fruit that is indigenous totropical Africaand naturalized inAsia.[6]The genusTamarindusismonotypic,meaning that it contains only this species. It belongs to the familyFabaceae.

The tamarind tree produces brown, pod-likefruitsthat contain a sweet, tangy pulp, which is used in cuisines around the world. The pulp is also used intraditional medicineand as ametal polish.The tree's wood can be used forwoodworkingandtamarind seed oilcan be extracted from the seeds. Tamarind's tender young leaves are used inSouth IndianandFilipino cuisine.[7][8]Because tamarind has multiple uses, it is cultivated around the world intropicalandsubtropical zones.

Description

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The tamarind is a long-living, medium-growthtree,which attains a maximumcrownheight of 25 metres (80 feet). The crown has an irregular,vase-shaped outline of densefoliage.The tree grows well in full sun. It prefersclay,loam,sandy,and acidic soil types, with a high resistance to drought and aerosol salt (wind-borne salt as found in coastal areas).[9][failed verification]

Theevergreenleaves are alternately arranged andparipinnately compound.The leaflets are bright green, elliptic-ovular,pinnatelyveined, and less than 5 centimetres (2 inches) in length. The branches droop from a single, centraltrunkas the tree matures, and are oftenprunedin agriculture to optimize tree density and ease of fruit harvest. At night, the leaflets close up.[9][failed verification]

As a tropical species, it is frost-sensitive. The pinnate leaves with opposite leaflets give a billowing effect in the wind. Tamarindtimberconsists of hard, dark redheartwoodand softer, yellowishsapwood.[10]

Tamarind pollen grains

The tamarind flowers bloom (although inconspicuously), with red and yellow elongated flowers. Flowers are 2.5 cm (1 in) wide, five-petalled, borne in smallracemes,and yellow with orange or red streaks.Budsare pink as the foursepalsare pink and are lost when the flowerblooms.[11]

Fruit

[edit]
Philippine sampalok

The fruit is anindehiscentlegume,sometimes called a pod,12 to 15 cm (4+12to 6 in) in length, with a hard, brown shell.[12][13][14]

The fruit has a fleshy, juicy, acidic pulp. It is mature when the flesh is coloured brown or reddish brown. The tamarinds of Asia have longer pods (containing six to 12 seeds), whereas African and West Indian varieties have shorter pods (containing one to six seeds). The seeds are somewhat flattened, and a glossy brown. The fruit is sweet and sour in taste.

History

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Etymology

[edit]

The name derives fromArabic:تمر هندي,romanizedtamr hindi,"Indiandate".[15]Several early medieval herbalists and physicians wrotetamar indi,medieval Latin use wastamarindus,andMarco Polowrote oftamarandi.

In Colombia, Nicaragua, Costa Rica, Ecuador, Cuba, the Dominican Republic, Guatemala, El Salvador, Honduras, Mexico, Peru, Puerto Rico, Venezuela, Italy, Spain, and throughout theLusosphere,it is calledtamarindo.In those countries it is often used to make thebeverage of the same name(oragua de tamarindo). In the Caribbean, tamarind is sometimes calledtamón.[citation needed]

Countries inSoutheast AsialikeIndonesiacall itasam jawa(Javanesesour fruit) or simplyasam,[16]andsukaerinTimor.[17]While in thePhilippines,it is calledsampalokorsampalocinFilipino,andsambaginCebuano.[18]Tamarind (Tamarindus indica) is sometimes confused with "Manila tamarind" (Pithecellobium dulce). While in the same taxonomic familyFabaceae,Manila tamarindis a different plant native to Mexico and known locally asguamúchili.

Taxonomy

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Tamarindus indicais probablyindigenousto tropical Africa,[19]but has been cultivated for so long on the Indian subcontinent that it is sometimes reported to be indigenous there.[20]It grows wild in Africa in locales as diverse as Sudan,[20][citation needed]Cameroon, Nigeria, Kenya, Zambia, Somalia, Tanzania and Malawi. In Arabia, it is found growing wild in Oman, especiallyDhofar,where it grows on the sea-facing slopes of mountains. It reached South Asia likely through human transportation and cultivation several thousand years ago.[20][21]It is widely distributed throughout the tropics,[20]from Africa to South Asia.

In the 16th century, it was introduced to Mexico and Central America, and to a lesser degree to South America, by Spanish and Portuguese colonists, to the degree that it became a staple ingredient in the region's cuisine.[22]

As of 2006India is the largest producer of tamarind.[23]The consumption of tamarind is widespread due to its central role in the cuisines of the Indian subcontinent, Southeast Asia, and the Americas, especially Mexico.[citation needed]

Uses

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Tamarinds, raw
Nutritional value per 100 g (3.5 oz)
Energy1,000 kJ (240 kcal)
62.5 g
Sugars57.4
Dietary fiber5.1 g
0.6 g
Saturated0.272 g
Monounsaturated0.181 g
Polyunsaturated0.059 g
2.8 g
Tryptophan0.018 g
Lysine0.139 g
Methionine0.014 g
Vitamins and minerals
VitaminsQuantity
%DV
Vitamin A equiv.
0%
2 μg
Vitamin A30 IU
Thiamine (B1)
36%
0.428 mg
Riboflavin (B2)
12%
0.152 mg
Niacin (B3)
12%
1.938 mg
Pantothenic acid (B5)
3%
0.143 mg
Vitamin B6
4%
0.066 mg
Folate (B9)
4%
14 μg
Choline
2%
8.6 mg
Vitamin C
4%
3.5 mg
Vitamin E
1%
0.1 mg
Vitamin K
2%
2.8 μg
MineralsQuantity
%DV
Calcium
6%
74 mg
Copper
96%
0.86 mg
Iron
16%
2.8 mg
Magnesium
22%
92 mg
Phosphorus
9%
113 mg
Potassium
21%
628 mg
Selenium
2%
1.3 μg
Sodium
1%
28 mg
Zinc
1%
0.1 mg
Other constituentsQuantity
Water31.40 g

Percentages estimated usingUS recommendationsfor adults,[24]except for potassium, which is estimated based on expert recommendation fromthe National Academies.[25]

Culinary

[edit]

The fruit is harvested by pulling the pod from its stalk. A mature tree can produce up to 175 kilograms (386 pounds) of fruit per year.Veneer grafting,shield (T or inverted T) budding,andair layeringmay be used to propagate desirable cultivars. Such trees will usually fruit within three to four years if provided optimum growing conditions.[9]

The fruit pulp is edible. The hard green pulp of a young fruit is considered by many to be too sour, but is often used as a component of savory dishes, as apicklingagent or as a means of making certain poisonousyamsin Ghana safe for human consumption.[26]As the fruit matures it becomes sweeter and less sour (acidic) and the ripened fruit is considered more palatable. The sourness varies between cultivars and some sweet tamarind ones have almost no acidity when ripe. In Western cuisine, tamarind pulp is found inWorcestershire sauce,[27]HP Sauce,and some brands ofbarbecue sauce[28][29](especially in Australia, with the tamarind derived from Worcestershire sauce[30]).

Tamarind paste has many culinary uses including as a flavoring forchutneys,curries, and the traditionalsharbatsyrup drink.[31]Tamarind sweetchutneyis popular in India and Pakistan[32]as a dressing for many snacks and often served withsamosa.Tamarind pulp is a key ingredient in flavoring curries and rice in south Indian cuisine, in theChigalilollipop, inrasam,Koddeland in certain varieties ofmasala chai.

Across the Middle East, from theLevanttoIran,tamarind is used in savory dishes, notably meat-based stews, and often combined with dried fruits to achieve a sweet-sour tang.[33][34]

In the Philippines, the whole fruit is used as one of the souring agents of the sour soupsinigang(which can also use other sour fruits), as well as another type of soup calledsinampalukan(which also uses tamarind leaves).[35][8]The fruit pulp are also cooked in sugar and/or salt to makechampóy na sampalok(or simply "sampalok candy" ), a traditional tamarind candy.[36]Indonesia also has a similarly sour, tamarind-based soup dish calledsayur asem.Tamarind pulp mixed with liquid is also used in beverage astamarind juice.In Java, Indonesia, tamarind juice is known ases asemorgula asem,tamarind juice served withpalm sugarand ice as a fresh sour and sweet beverage.

In Mexico, Central America, and the Caribbean, the pulp is diluted with water and sugared to make anagua frescadrink. It is widely used throughout all of Mexico for candy making, including tamarind mixed with chilli powder candy.

InSokoto,Nigeria,tamarind pulp is used to fix the color indyedleather products by neutralizing the alkali substances used in tanning.[37]

The leaves and bark are also edible, and the seeds can be cooked to make safe for consumption.[38]Blanched, tender tamarind leaves are used in aBurmese saladcalledmagyi ywet thoke(မန်ကျည်းရွက်သုပ်;lit.'tamarind leaf salad'), a salad fromUpper Myanmarthat features tender blanched tamarind leaves, garlic, onions, roasted peanuts, and pounded dried shrimp.[39][40]

Seed oil and kernel powder

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Tamarind seed oil is made from the kernel of tamarind seeds.[41]The kernel is difficult to isolate from its thin but tough shell (ortesta). It has a similar consistency to linseed oil, and can be used to make paint or varnish.[42]

Tamarind kernel powder is used assizingmaterial for textile and jute processing, and in the manufacture of industrial gums and adhesives. It is de-oiled to stabilize its colour and odor on storage.[citation needed]

Folk medicine

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Throughout Southeast Asia, the fruit of the tamarind is used as apoulticeapplied to the foreheads of people with fevers.[12]The fruit exhibitslaxativeeffects due to its high quantities ofmalic acid,tartaric acid,andpotassium bitartrate.Its use for the relief ofconstipationhas been documented throughout the world.[43][44]Extract of steamed and sun-dried old tamarind pulp in Java (asem kawa) are used to treat skin problems like rashes and irritation; it can also be ingested after dilution as anabortifacient.[16]

Woodworking

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Tamarind wood is used to make furniture, boats (as perRumphius) carvings, turned objects such asmortars and pestles,chopping blocks, and other small specialty wood items likekrises.[16]Tamarind heartwood is reddish brown, sometimes with a purplish hue. The heartwood in tamarind tends to be narrow and is usually only present in older and larger trees. The pale yellow sapwood is sharply demarcated from the heartwood. Heartwood is said to be durable to very durable in decay resistance, and is also resistant to insects. Its sapwood is not durable and is prone to attack by insects and fungi as well asspalting.Due to its density and interlocked grain, tamarind is considered difficult to work. Heartwood has a pronounced blunting effect on cutting edges. Tamarind turns, glues, and finishes well. The heartwood is able to take a high natural polish.[45]

Metal polish

[edit]

In homes and temples, especially inBuddhistAsian countries includingMyanmar,the fruit pulp is used to polish brass shrine statues and lamps, and copper, brass, and bronze utensils.[46]Tamarind containstartaric acid,a weak acid that can removetarnish.Lime,another acidic fruit, is used similarly.[20]

Composition of tamarind seed kernel
Composition Original De-oiled
Oil 7.6% 0.6%
Protein 7.6% 19.0%
Polysaccharide 51.0% 55.0%
Crude fiber 1.2% 1.1%
Total ash 3.9% 3.4%
Acid insoluble ash 0.4% 0.3%
Moisture 7.1%
The fatty acid composition of the oil islinoleic46.5%,oleic27.2%,
andsaturated fatty acids26.4%. The oil is usually bleached after refining.
Fatty acid composition of tamarind kernel oil
Fatty acid (%) Range reported
Lauric acid(C12:0) tr-0.3
Myristic acid(C14:0) tr-0.4
Palmitic acid(C16:0) 8.7–14.8
Stearic acid(C18:0) 4.4–6.6
Arachidic acid(C20:0) 3.7–12.2
Lignoceric acid(C24:0) 4.0–22.3
Oleic acid(C18:1) 19.6–27.0
Linoleic acid(18:2) 7.5–55.4
Linolenic acid(C18:3) 2.8–5.6

Research

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In hens, tamarind has been found to lower cholesterol in their serum and in the yolks of the eggs they laid.[47][48]

In dogs, thetartaric acidof tamarind causesacute kidney injury,which can often be fatal.[49]

Lupanone,lupeol,catechins,epicatechin,quercetin,andisorhamnetinare present in the leafextract.[50]Ultra-high performance liquid chromatography analyses revealed that tamarind seeds contained catechin,procyanidin B2,caffeic acid,ferulic acid,chloramphenicol,myricetin,morin,quercetin,apigeninandkaempferol.[51]

Cultivation

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Seeds can bescarifiedor briefly boiled to enhancegermination.They retain their germination capability for several months if kept dry.[citation needed]

The tamarind has long beennaturalizedin Indonesia, Malaysia, Sri Lanka, the Philippines, the Caribbean, and Pacific Islands. Thailand has the largest plantations of theASEANnations, followed by Indonesia, Myanmar, and the Philippines. In parts of Southeast Asia, tamarind is calledasam.[52]It is cultivated all over India, especially inMaharashtra,Chhattisgarh,Karnataka,Telangana,Andhra Pradesh,andTamil Nadu.Extensive tamarind orchards in India produce 250,000 tonnes (280,000 short tons) annually.[9]

In the United States, it is a large-scale crop introduced for commercial use (second in net production quantity only to India), mainly in southern states, notably south Florida, and as a shade tree, along roadsides, in dooryards and in parks.[53]

A traditional food plant in Africa, tamarind has the potential to improve nutrition, boost food security, foster rural development and support sustainable landcare.[54]In Madagascar, its fruit and leaves are a well-known favorite of thering-tailed lemur,providing as much as 50 percent of their food resources during the year if available.[55]

Horticulture

[edit]

Throughout South Asia and the tropical world, tamarind trees are used as ornamental, garden, and cash crop plantings. Commonly used as a bonsai species in many Asian countries, it is also grown as an indoor bonsai in temperate parts of the world.[56]

References

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