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Sunday, March 4, 2018

The persimmon (sometimes spelled persimon) is the edible fruit of a number of species of trees in the genus Diospyros. The most widely cultivated of these is the Oriental or Japanese persimmon, Diospyros kaki. Diospyros is in the family Ebenaceae, and a number of non-persimmon species of the genus are grown for ebony timber.

Names and etymology




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The word Diospyros comes from the ancient Greek words "dios" (δῐος) and "pyron" (πῡρον). A popular etymology construed this as "divine fruit", or as meaning "wheat of Zeus" or "God's pear" and "Jove's fire". The dio-, as shown by the short vowel 'i' has nothing to do with 'divine' (δá¿'oÏ‚ ), dio- being an affix attached to plant names, and in classical Greek the compound referred to 'the fruit of the nettle tree'.

The word persimmon itself is derived from putchamin, pasiminan, or pessamin, from Powhatan, an Algonquian language of the eastern United States, meaning "a dry fruit".

Description


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The tree Diospyros kaki is the most widely cultivated species of persimmon. Typically the tree reaches 4.5 to 18 metres (15 to 59 ft) in height and is round-topped. It stands erect, but sometimes can be crooked or have a willowy appearance.

The leaves alternate, are oblong with brown-hairy petioles that are 2 centimetres (0.8 in) in length. They are leathery and glossy on the upper surface, brown and silky underneath. The leaves are deciduous and bluish-green in color. In the fall, they turn to yellow, orange, or red.

Persimmon trees are typically dioecious, meaning male and female flowers are produced on separate trees. Some trees have both male and female flowers and in rare cases also bear the 'perfect' flower. Male flowers are pink and appear in groups of 3. They have a 4-parted calyx, a corolla, and 24 stamens in 2 rows. Female flowers are creamy-white and appear solitary. They have a large calyx, a 4-parted, yellow corolla, 8 undeveloped stamens, and a rounded ovary bearing the style and stigma. 'Perfect' flowers are a cross between the two and contain both male and female reproductive organs.

Persimmon fruit matures late in the fall and can stay on the tree until winter. In color, the ripe fruit of the cultivated strains range from glossy light yellow-orange to dark red-orange depending on the species and variety. They similarly vary in size from 1.5 to 9 cm (0.59 to 3.54 in) in diameter, and in shape the varieties may be spherical, acorn-, or pumpkin-shaped. The flesh is astringent until fully ripe and is yellow, orange, or dark-brown in color. The calyx generally remains attached to the fruit after harvesting, but becomes easy to remove once the fruit is ripe. The ripe fruit has a high glucose content and is sweet in taste. Like the tomato, persimmons are not typically considered to be berries, but in terms of botanical morphology, the fruit is in fact a berry.

Selected species


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While there are many species of Diospyros that bear fruit inedible to humans, the following are those that bear edible fruit:

Diospyros kaki (Asian persimmon, Japanese persimmon)

Asian or Japanese persimmon (Diospyros kaki) is native to Japan, China, Korea, Burma and Nepal. It is deciduous, with broad, stiff leaves, and is known as the shizi (柿子 in Chinese), and also as the Japanese Persimmon or kaki (柿) in Japanese. It is the most widely cultivated species. Its fruits are sweet and slightly tangy with a soft to occasionally fibrous texture. Cultivation of the fruit extended first to other parts of east Asia, India and Nepal and was later introduced to California and southern Europe in the 1800s and to Brazil in the 1890s. Numerous cultivars have been selected. Some varieties are edible in the crisp, firm state but it has its best flavor when allowed to rest and soften slightly after harvest. The Japanese cultivar 'Hachiya' is widely grown. The fruit has a high tannin content, which makes the unripe fruit astringent and bitter. The tannin levels are reduced as the fruit matures. Persimmons like 'Hachiya' must be completely ripened before consumption. When ripe, this fruit comprises thick, pulpy jelly encased in a waxy thin-skinned shell.

"Sharon fruit" (named after the Sharon plain in Israel) is the marketing name for the Israeli-bred cultivar 'Triumph'. As with all pollination-variant-astringent persimmons, the fruit are ripened off the tree by exposing them to carbon dioxide. The "sharon fruit" has no core, is seedless and particularly sweet, and can be eaten whole.

In the Valencia region of Spain, there is a variegated form of kaki called the "Ribera del Xuquer", "Spanish persimon" (with one 'm') or "Rojo Brillante" ("bright red").

Diospyros lotus (date-plum)

Date-plum (Diospyros lotus), also known as lotus persimmon, is native to southwest Asia and southeast Europe. It was known to the ancient Greeks as "the fruit of the gods" and often referred to as "nature's candy". Its English name probably derives from Persian Khormaloo خرمالو literally "date-plum", referring to the taste of this fruit, which is reminiscent of both plums and dates.

Diospyros virginiana (American persimmon)

American persimmon (Diospyros virginiana) is native to the eastern United States. Its fruit is traditionally eaten in a special steamed pudding in the Midwest, and sometimes its timber is used as a substitute for ebony (e.g., in instruments).

Diospyros digyna (black persimmon)

Black persimmon or black sapote (Diospyros digyna) is native to Mexico. Its fruit has green skin and white flesh that turns black when ripe.

Diospyros discolor

The Mabolo or Velvet-apple (Diospyros discolor) is native to the Philippines. It is bright red when ripe. It is also native to China, where it is known as shizi. It is also known as Korean mango.

Diospyros peregrina (Indian persimmon)

Indian persimmon (Diospyros peregrina) is a slow-growing tree, native to coastal West Bengal. The fruit is green and turns yellow when ripe. It is relatively small with an unremarkable flavor and is better known for uses in folk medicine rather than culinary applications.

Diospyros texana (Texas persimmon)

Texas persimmon (Diospyros texana) is native to central and west Texas and southwest Oklahoma in the United States, and eastern Chihuahua, Coahuila, Nuevo León, and Tamaulipas in northeastern Mexico. The fruit of D. texana are black on the outside (as opposed to just on the inside as with the Mexican persimmon) subglobose berries with a diameter of 1.5â€"2.5 cm (0.59â€"0.98 in) ripen in August. The fleshy berries become edible when they turn dark purple or black, at which point they are sweet and can be eaten from the hand or made into pudding or custard.

Fruit


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Commercially and in general, there are two types of persimmon fruit: astringent and non-astringent.

The heart-shaped Hachiya is the most common variety of astringent persimmon. Astringent persimmons contain very high levels of soluble tannins and are unpalatable if eaten before completely softened, though the sweet, delicate flavor of fully ripened persimmons of varieties that are astringent when unripe is particularly relished. The astringency of tannins is removed in various ways. Examples include ripening by exposure to light for several days and wrapping the fruit in paper (probably because this increases the ethylene concentration of the surrounding air). Ethylene ripening can be increased in reliability and evenness, and the process can be greatly accelerated by adding ethylene gas to the atmosphere in which the fruit is stored. For domestic purposes, the most convenient and effective process is to store the ripening persimmons in a clean, dry container together with other varieties of fruit that give off particularly large quantities of ethylene while they are ripening; apples and related fruits such as pears are effective, and so are bananas and several others. Other chemicals are used commercially in artificially ripening persimmons or delaying their ripening. Examples include alcohol and carbon dioxide, which change tannin into the insoluble form. Such bletting processes sometimes are jump-started by exposing the fruit to cold or frost. The resultant cell damage stimulates the release of ethylene, which promotes cellular wall breakdown.

Astringent varieties of persimmons also can be prepared for commercial purposes by drying. Tanenashi fruit will occasionally contain a seed or two, which can be planted and will yield a larger, more vertical tree than when merely grafted onto the D. virginiana rootstock most commonly used in the U.S. Such seedling trees may produce fruit that bears more seeds, usually 6 to 8 per fruit, and the fruit itself may vary slightly from the parent tree. Seedlings are said to be more susceptible to root nematodes.

The non-astringent persimmon is squat like a tomato and is most commonly sold as fuyu. Non-astringent persimmons are not actually free of tannins as the term suggests but rather are far less astringent before ripening and lose more of their tannic quality sooner. Non-astringent persimmons may be consumed when still very firm and remain edible when very soft.

There is a third type, less commonly available, the pollination-variant non-astringent persimmons. When fully pollinated, the flesh of these fruit is brown insideâ€"known as goma in Japanâ€"and the fruit can be eaten when firm. These varieties are highly sought after. Tsurunoko, sold as "chocolate persimmon" for its dark brown flesh, Maru, sold as "cinnamon persimmon" for its spicy flavor, and Hyakume, sold as "brown sugar", are the three best known.

Before ripening, persimmons usually have a "chalky" or bitter taste.

Production

In 2013, world production of persimmons was 4.6 million tonnes, with China accounting for 43% of this total (table). Other major producers include the Republic of Korea, Japan, Brazil and Azerbaijan (table).

Culinary uses

Persimmons are eaten fresh, dried, raw, or cooked. When eaten fresh, they are usually eaten whole like an apple in bite-size slices, and may be peeled. One way to consume ripe persimmons, which may have soft texture, is to remove the top leaf with a paring knife and scoop out the flesh with a spoon. Riper persimmons can also be eaten by removing the top leaf, breaking the fruit in half, and eating from the inside out. The flesh ranges from firm to mushy, and, when firm owing to being unripe, has an apple-like crunch. American persimmons (Diospyros virginiana) and Diospyros digyna are completely inedible until they are fully ripe.

In China, Korea, Japan, and Vietnam, 'Hachiya' persimmons after harvesting are prepared using traditional hand-drying techniques outdoors for two to three weeks. The fruit is then further dried by exposure to heat over several days before being shipped to market. In Japan, the dried fruit is called hoshigaki, in China "shìbǐng", in Korea gotgam (hangul), and in Vietnam há»"ng khô. It is eaten as a snack or dessert and used for other culinary purposes.

In Korea, dried persimmon fruits are used to make the traditional Korean spicy punch sujeonggwa, while the matured, fermented fruit is used to make a persimmon vinegar called gamsikcho.

In Taiwan, fruits of astringent varieties are sealed in jars filled with limewater to get rid of bitterness. Slightly hardened in the process, they are sold under the name "crisp persimmon" (cuishi) or "water persimmon" (shuishizi). Preparation time is dependent upon temperature (5 to 7 days at 25â€"28 °C (77â€"82 °F)).

For centuries, Japanese have consumed persimmon leaf tea (Kaki-No-Ha Cha) made from the dried leaves of "kaki" persimmons (Diospyros kaki). In some areas of Manchuria and Korea, the dried leaves of the fruit are used for making tea. The Korean name for this tea is ghamnip cha.

In the Old Northwest of the United States, persimmons are harvested and used in a variety of dessert dishes, most notably pies. They can be used in cookies, cakes, puddings, salads, curries and as a topping for breakfast cereal. Persimmon pudding is a baked dessert made with fresh persimmons that has the consistency of pumpkin pie but resembles a brownie and is almost always topped with whipped cream. An annual persimmon festival, featuring a persimmon pudding contest, is held every September in Mitchell, Indiana.

Persimmons may be stored at room temperature 20 °C (68 °F) where they will continue to ripen. In northern China, unripe persimmons are frozen outside during winter to speed up the ripening process.

Nutrient and phytochemical content


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Compared to apples, persimmons have higher levels of dietary fiber and some dietary minerals, but overall are not a significant source of nutrients except for manganese (17% of the Daily Value, DV) and provitamin A beta-carotene (10% DV, table for raw Japanese persimmons per 100 gram amount). In a 100 gram amount, raw American persimmons are a rich source of vitamin C (80% DV) and iron (19% DV, table).

Persimmon fruits contain phytochemicals, such as catechin, gallocatechin and betulinic acid.

Unripened persimmons and bezoars

Unripened persimmons contain the soluble tannin shibuol, which, upon contact with a weak acid, polymerizes in the stomach and forms a gluey coagulum, a "foodball" or phytobezoar, that can affix with other stomach matter. These phytobezoars are often very hard and almost woody in consistency. More than 85% of phytobezoars are caused by ingestion of unripened persimmons.

Persimmon bezoars (diospyrobezoars) often occur in epidemics in regions where the fruit is grown. Diospyrobezoars should not be of concern when consuming moderate quantities of persimmons. One case in medical literature from 2004 revealed a 51-year-old patient who had eaten a kilogram (2.2 pounds) of unpeeled persimmons each day for 40 years. Surgery is sometimes employed, but Coca-Cola also has been used successfully to chemically shrink or eliminate persimmon-related bezoars.

It is often advised that persimmons should not be eaten on an empty stomach.

Horses may develop a taste for the fruit growing on a tree in their pasture and overindulge also, making them quite ill.

Wood


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Though persimmon trees belong to the same genus as ebony trees, persimmon tree wood has a limited use in the manufacture of objects requiring hard wood. It is hard, but cracks easily and is somewhat difficult to process. Persimmon wood is used for paneling in traditional Korean and Japanese furniture.

In North America, the lightly colored, fine-grained wood of D. virginiana is used to manufacture billiard cues and textile shuttles. It is also used in the percussion field to produce the shaft of some mallets and drumsticks. Persimmon wood was also heavily used in making the highest-quality heads of the golf clubs known as "woods" until the golf industry moved primarily to metal woods in the last years of the 20th century. In fact, the first metal woods made by TaylorMade, an early pioneer of that club type, were branded as "Pittsburgh Persimmons". Persimmon woods are still made, but in far lower numbers than in past decades. Over the last few decades persimmon wood has become popular among bow craftsmen, especially in the making of traditional longbows. Persimmon wood is used in making a small number of wooden flutes and eating utensils such as wooden spoons and cornbread knives (wooden knives that may cut through the bread without scarring the dish).

Like some other plants of the genus Diospyros, older persimmon heartwood is black or dark brown in color, in stark contrast to the sapwood and younger heartwood, which is pale in color.

Trees


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The trees of all species have stiff, tumescent leaves, but the female of the D. virginiana can look less turgid than the male because the leaves droop when fruiting, perhaps because of the heavier nutrient requirements. They grow swiftly, and are resilient to the stresses of unpredictable climates. Persimmons can tolerate and adapt to a wide range of climates. Persimmons are also known for their resistance to diseases and pests. They are one of the last trees to leaf out in the spring, and do not flower until well after the leaves have formed, bypassing the threat of blossom loss to frosts. The fruit hangs on the branches long into the winter. Because they grow swiftly and colonize off their root systems, they are ideal for helping recover habitat. A persimmon tree will be mature enough to bear fruit within 7â€"8 years. They hold their own against flooding riverbanks quite well and are listed in Stormwater Journal's list of water-holding trees.

Folklore



  • In Ozark folklore, the severity of the upcoming winter is said to be predictable by slicing a persimmon seed and observing the cutlery-shaped formation within it.
  • In Korean folklore the dried persimmon (gotgam, Korean: 곶감) has a reputation for scaring away tigers.

In popular culture



  • Persimmons are the favourite food of the title character of the film Okja.

Gallery



References



External links



  •  "Persimmon". Encyclopædia Britannica (11th ed.). 1911. 


 
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