Okra

Okra
Mature and developing fruits (pods) (Hong Kong)
Longitudinal section of fruit
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Clade:	Rosids
Order:	Malvales
Family:	Malvaceae
Genus:	Abelmoschus
Species:	A. esculentus
Binomial name
Abelmoschus esculentus (L.) Moench
Synonyms[1]
Abelmoschus bammia Webb Abelmoschus longifolius (Willd.) Kostel. Abelmoschus officinalis (DC.) Endl. Abelmoschus praecox Sickenb. Abelmoschus tuberculatus Pal & Singh Hibiscus esculentus L. Hibiscus hispidissimus A.Chev. nom. illeg. Hibiscus longifolius Willd. Hibiscus praecox Forssk.

Okra (US: /ˈoʊkrə/, UK: /ˈɒkrə/), Abelmoschus esculentus, known in some English-speaking countries as lady's fingers,^[2][3] is a flowering plant in the mallow family native to East Africa.^[4] It has edible green seed pods. Cultivated in tropical, subtropical, and warm temperate regions around the world, okra is used in the cuisines of many countries.^[5]

Etymology

Abelmoschus is Neo-Latin from Arabic: أَبُو المِسْك,^[6] while esculentus is Latin for being fit for human consumption.^[7]

The first use of the word okra (alternatively; okro or ochro) appeared in 1679 in the Colony of Virginia, deriving from Igbo: ọ́kwụ̀rụ̀.^[8] The word gumbo was first used in American English around 1805, derived from Louisiana Creole,^[9] but originates from either Umbundu: ochinggõmbo^[10] or Template:Lang-kmb.^[11] Even though the word gumbo often refers to the dish gumbo in most of the United States , many places in the Deep South may have used it to refer to the pods and plant as well as many other variants of the word found across the African diaspora in the Americas.^[12]

Origin and distribution

Whole plant with blossom and immature pod

Okra is an allopolyploid of uncertain parentage. However, proposed parents include Abelmoschus ficulneus, A. tuberculatus and a reported "diploid" form of okra.^[13] Truly wild (as opposed to naturalised) populations are not known with certainty, and the West African variety has been described as a cultigen.^[14]

Okra originated in West Africa and wild okra plants were seen in eastern Sudan in the nineteenth century.^[4] Okra was introduced to Europe by the Umayyad conquest of Hispania. One of the earliest accounts is by Abu al-Abbas al-Nabati, who visited Ayyubid Egypt in 1216 and described the plant under cultivation by the locals who ate the tender, young pods with meal.^[15] From Arabia, the plant spread around the shores of the Mediterranean Sea and eastward.^[16]

Plants about one week after germination, Oklahoma

The plant was introduced to the Americas by ships plying the Atlantic slave trade^[17] by 1658, when its presence was recorded in Brazil . It was further documented in Suriname in 1686. Okra may have been introduced to southeastern North America from Africa in the early 18th century. By 1748, it was being grown as far north as Philadelphia.^[18] Thomas Jefferson noted it was well established in Virginia by 1781. It was commonplace throughout the Southern United States by 1800, and the first mention of different cultivars was in 1806.^[4]

Botany and cultivation

Pollen grains

Cross-section of a pod

The species is a perennial, often cultivated as an annual in temperate climates, often growing to around 2 metres (6 ft 7 in) tall. As a member of the Malvaceae, it is related to such species as cotton, cocoa, and hibiscus. The leaves are 10–20 centimetres (4–8 in) long and broad, palmately lobed with 5–7 lobes. The flowers are 4–8 centimetres (1 ⁵⁄₈–3 ¹⁄₈ in) in diameter, with five white to yellow petals, often with a red or purple spot at the base of each petal. The pollens are spherical and approximately 188 microns in diameter. The fruit is a capsule up to 18 centimetres (7 in) long with pentagonal cross-section, containing numerous seeds.

Abelmoschus esculentus is cultivated throughout the tropical and warm temperate regions of the world for its fibrous fruits or pods containing round, white seeds. It is among the most heat- and drought-tolerant vegetable species in the world and will tolerate soils with heavy clay and intermittent moisture, but frost can damage the pods. In cultivation, the seeds are soaked overnight prior to planting to a depth of 1–2 centimetres (³⁄₈–¹³⁄₁₆ in). It prefers a soil temperature of at least 20 °C (68 °F) for germination, which occurs between six days (soaked seeds) and three weeks. As a tropical plant, it also requires a lot of sunlight, and it should also be cultivated in soil that has a pH between 5.8 and 7, ideally on the acidic side.^[19] Seedlings require ample water. The seed pods rapidly become fibrous and woody and, to be edible as a vegetable, must be harvested when immature, usually within a week after pollination.^[20] The first harvest will typically be ready about 2 months after planting, and it will be approximately 2–3 inches (51–76 mm) long.^[19]

The most common disease afflicting the okra plant is verticillium wilt, often causing a yellowing and wilting of the leaves. Other diseases include powdery mildew in dry tropical regions, leaf spots, yellow mosaic and root-knot nematodes. Resistance to yellow mosaic virus in A. esculentus was transferred through a cross with Abelmoschus manihot and resulted in a new variety called Parbhani kranti.^[21]

In the United States much of the supply is grown in Florida, especially around Dade in southern Florida.^[22][23] Okra is grown throughout the state to some degree, so okra is available ten months of the year.^[22] Yields range from less than 18,000 pounds per acre (20,000 kg/ha) to over 30,000 pounds per acre (34,000 kg/ha).^[22] Wholesale prices can go as high as $18/bushel which is $0.60 per pound ($1.3/kg).^[22] The Regional IPM Centers provide integrated pest management plans for use in the state.^[22]

Production

In 2021, world production of okra was 10.8 million tonnes, led by India with 60% of the total, with Nigeria and Mali as secondary producers.

Okra production – 2021
Country	(Millions of tonnes)
India	6.47
Nigeria	1.92
Mali	0.67
Sudan	0.32
Pakistan	0.26
World	10.82
Source: FAOSTAT[24]

Uses

Nutrition

Raw okra contains 90% water, 2% protein, 7% carbohydrates and negligible fat. In a 100 gram reference amount, raw okra is a rich source (20% or more of the Daily Value, DV) of dietary fiber, vitamin C, and vitamin K, with moderate contents of thiamin, folate and magnesium (table).

Culinary

Okra is one of three thickeners that may be used in gumbo soup from Louisiana.^[25] Fried okra is a dish from the Cuisine of the Southern United States. In Cuba and Puerto Rico, the vegetable is referred to as quimbombó, and is used in dishes such as quimbombó guisado (stewed okra), a dish similar to gumbo.^[26][27] It is also used in traditional dishes in the Dominican Republic, where it is called molondrón.^[28] In Brazil , it is an important component of several regional dishes, such as Caruru, made with shrimp, in the Northeastern region, and Frango com Quiabo (Chicken with Okra) and Carne Refogada com Quiabo (Stewed meat with Okra) in Minas Gerais.

In South Asia, the pods are used in many spicy vegetable preparations as well as cooked with beef, mutton, lamb and chicken.^[29][30]

Pods

Stir-fried sliced okra fruits

The pods of the plant are mucilaginous, resulting in the characteristic "goo" or slime when the seed pods are cooked; the mucilage contains soluble fiber.^[31] One possible way to de-slime okra is to cook it with an acidic food, such as tomatoes, to minimize the mucilage.^[32] Pods are cooked, pickled, eaten raw, or included in salads. Okra may be used in developing countries to mitigate malnutrition and alleviate food insecurity.^[31]

Leaves and seeds

Young okra leaves may be cooked similarly to the greens of beets or dandelions, or used in salads. Okra seeds may be roasted and ground to form a caffeine-free substitute for coffee.^[4] When importation of coffee was disrupted by the American Civil War in 1861, the Austin State Gazette said, "An acre of okra will produce seed enough to furnish a plantation with coffee in every way equal to that imported from Rio."^[33]

Greenish-yellow edible okra oil is pressed from okra seeds; it has a pleasant taste and odor, and is high in unsaturated fats such as oleic acid and linoleic acid.^[34] The oil content of some varieties of the seed is about 40%. At 794 kilograms per hectare (708 lb/acre), the yield was exceeded only by that of sunflower oil in one trial.^[35]

Industrial

Bast fibre from the stem of the plant has industrial uses such as the reinforcement of polymer composites.^[36] The mucilage produced by the okra plant can be used for the removal of turbidity from wastewater by virtue of its flocculant properties.^[37][38] Having composition similar to a thick polysaccharide film, okra mucilage is under development as a biodegradable food packaging, as of 2018.^[39] A 2009 study found okra oil suitable for use as a biofuel.^[40]

Gallery

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  Large okra plants

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  A giant okra pod

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  Flower close-up

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  Stamen and pollen

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  Young seedling showing cotyledons

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  Fresh-picked fruits

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  Bhindi bharta, an Indian and Pakistani dish

References

External links

Wikidata ☰ Q80531 entry

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