The durian () is the edible fruit of several tree species belonging to the genus Durio. There are 30 recognized species, at least nine of which produce edible fruit.
Known in some regions as the "king of fruits", the durian is distinctive for its large size, strong odour, and thorn-covered rind. The fruit can grow as large as long and in diameter, and it typically weighs . Its shape ranges from oblong to round, the colour of its husk from green to brown, and its flesh from pale yellow to red, depending on the species.
Some people regard the durian as having a pleasantly sweet fragrance, whereas others find the aroma overpowering and unpleasant. The persistence of its strong odour, which may linger for several days, has led some hotels and public transportation services in Southeast Asia, such as in Singapore and Bangkok, to ban the fruit. The flesh can be consumed at various stages of ripeness, and it is used to flavour a wide variety of sweet desserts and savoury dishes in Southeast Asian cuisines. The seeds can be eaten when cooked.
D. zibethinus is the only species commercially cultivated on a large scale and available outside its native region. Since this species is open-pollinated, it shows considerable diversity in fruit colour and odour, size of flesh and seed, and tree phenology. In the species name, zibethinus refers to the Indian civet, Viverra zibetha. There is disagreement over whether this name, bestowed by Carl Linnaeus, alludes to civets being so fond of the durian that the fruit was used as bait to entrap them, or to the durian's smelling like the civet. See also pp. 5–6 on whether Linnaeus or Murray is the correct authority for the binomial name.
Durian flowers are large and feathery, with copious nectar; they give off a heavy, sour, buttery odour. These features are typical of flowers pollinated by certain species of that eat nectar and pollen. Durians can be pollinated by bats (the cave nectar bat Eonycteris spelaea, the lesser short-nosed fruit bat Cynopterus brachyotis, and the large flying fox, Pteropus vampyrus). Two species, D. grandiflorus and Durio oblongus, are pollinated by spiderhunter birds (Nectariniidae), while D. kutejensis is pollinated by giant honey bees and birds as well as by bats. Some scientists have hypothesised that the development of monothecate Stamen and larger flowers (compared with those of the remaining genera in Durioneae) in the clade consisting of Durio, Boschia, and Cullenia was in conjunction with a transition from beetle pollination to vertebrate pollination.
Musang King (D197) was discovered in the 1980s, when a man named Tan Lai Fook from Raub, Pahang, stumbled upon a durian tree in Gua Musang, Kelantan. He brought a branch back to Raub for grafting. The cultivar was named after its place of origin. The variety has bright yellow flesh and is like a more potent or enhanced version of the D24. The D24 or Sultan durian has golden yellow flesh and a rich texture and aroma. It is a popular variety in Malaysia.
Other popular cultivars in Malaysia include "Tekka", with a distinctive yellowish core in the inner stem; "D168" (IOI), which is round, of medium size, green and yellow outer skin, and easily dislodged flesh which is medium-thick, solid, yellow in colour, and sweet; and "Red Prawn" ( Udang Merah, D175), found in the states of Pahang and Johor. The fruit is medium-sized, oval, brownish green, with short thorns. The flesh is thick, not solid, yellow-coloured, and has a sweet taste.
By 2007, Thai government scientist Songpol Somsri had crossbred more than ninety varieties of durian to create Chantaburi No. 1, a cultivar without the characteristic odour. Another hybrid, Chantaburi No. 3, develops the odour about three days after the fruit is picked, which enables an odourless transport yet satisfies consumers who prefer the pungent odour. In 2012, two odourless cultivars, Long Laplae and Lin Laplae, were presented to the public by Yothin Samutkhiri, governor of Thailand's Uttaradit province where they were developed.
In Brunei, consumers prefer D. graveolens, D. kutejensis, and D. oxleyanus. These species constitute a genetically diverse crop source.
Durian was introduced into Australia in the early 1960s, and clonal material followed in 1975. Over thirty clones of D. zibethinus and six other Durio species have been subsequently introduced into Australia. In 2019 the value of imported fresh durian became the highest of all fresh fruits imported to China, which was previously Cherry. In 2021, China purchased at least US$3.4 billion worth or 90 percent of Thailand's fresh durian exports in that year. Overall Chinese imports grew to $4 billion in 2022, when the Philippines and Vietnam gained permission to export fresh durians to China, and $6.7 billion in 2023 when 1.4 million tonnes were imported. Durian has become a status symbol indicating wealth. Durian from Thailand retails at around ¥150 (US$20), while the more prestigious Musang King variety retails at around ¥500 and can be a birthday or wedding gift. The potential value for exporters has allowed China to leverage durian as part of trade talks. The entire export of durians from Southeast Asia to China increased from US$550 million in 2017, to US$6.7 billion in 2023. China's largest imports of the fruit came from Thailand, followed by Malaysia and Vietnam.
Durian is a relatively costly fruit because of its short shelf life. Shelf life can be extended to around 4 to 5 weeks by shrink wrapping each fruit. This inhibits dehiscence, probably by multiple mechanisms: inhibiting respiration; reducing loss of water; holding the fruit's parts together; and reducing decomposition by microbes. The edible portion of the fruit, known as the aril and usually called the 'flesh' or 'pulp', only accounts for about 15–30% of the mass of the entire fruit.
The novelist Anthony Burgess wrote that eating durian is "like eating sweet raspberry blancmange in the lavatory". The travel and food writer Richard Sterling states that "its odor is best described as pig-excrement, turpentine and onions, garnished with a gym sock."
The fruit's strong smell has led to its ban from public transport systems in Singapore and in Bangkok.
Hundreds of responsible for durian flavour and aroma include diverse volatile compounds, such as , , alcohols (primarily ethanol), and organosulfur compounds, with various . Ethyl butyrate had the highest content among esters in a study of several varieties. Sugar content, primarily sucrose, has a range of 8–20% among different durian varieties. Durian flesh contains diverse , especially myricetin, and various , including a rich content of beta-carotene. In 2019, ethanethiol and its derivatives were identified as a source of the fetid smell. However, the biochemical pathway by which the plant produces ethanethiol remained unclear.
People in Southeast Asia with frequent exposures to durian are able to easily distinguish the sweet-like scent of its ketones and esters from rotten or putrescine odours which are from volatile amines and . Some individuals are unable to differentiate these smells and find this fruit noxious, whereas others find it pleasant and appealing.
This strong odour can be detected half a mile away by animals, thus luring them. In addition, the fruit is highly appetising to diverse animals, including , Chevrotain, pigs, sun bear, orangutan, Asian elephant, and even carnivorous . While some of these animals swallow the seed with the fruit and then transport it some distance before excreting, thus dispersing the seed,
The various preferences regarding ripeness among consumers make it hard to issue general statements about choosing a "good" durian. A durian that falls off the tree continues to ripen for two to four days, but after five or six days most would consider it overripe and unpalatable. All the same, some Thais cook such overripe fruit with palm sugar, creating a dessert called durian (or thurian) guan.
Durian fruit is used to flavour a wide variety of sweet edibles such as traditional Malay candy, ice kacang, dodol, lempuk, rose biscuits, ice cream, , , Yule logs, and cappuccino. Es durian (durian ice cream) is a popular dessert in Indonesia, sold at streetside stalls in Indonesian cities, especially in Java. Pulut durian or ketan durian is glutinous rice steamed with coconut milk and served with ripened durian. In Sabah, red durian is fried with onions and chilli and served as a side dish. Red-fleshed durian is traditionally added to sayur, an Indonesian soup made from freshwater fish. Ikan brengkes tempoyak is fish cooked in a durian-based sauce, traditional in Sumatra.
The earliest known European reference to the durian is the record of Niccolò de' Conti, who travelled to Southeast Asia in the 15th century. Translated from the Latin in which Poggio Bracciolini recorded de Conti's travels: "They people have a green fruit which they call durian, as big as a watermelon. Inside there are five things like elongated oranges, and resembling thick butter, with a combination of flavours."
D. zibethinus was introduced into Sri Lanka by the Portuguese in the 16th century and was reintroduced many times later. It has been planted in the Americas but confined to . The first seedlings were sent from the Royal Botanic Gardens, Kew, to Auguste Saint-Arroman of Dominica in 1884.
In Southeast Asia, the durian has been cultivated for centuries at the village level, probably since the late 18th century, and commercially since the mid-20th century. In My Tropic Isle, Australian author and naturalist Edmund James Banfield tells how, in the early 20th century, a friend in Singapore sent him a durian seed, which he planted and cared for on his tropical island off the north coast of Queensland.
In 1949, the British botanist E. J. H. Corner published The Durian Theory, or the Origin of the Modern Tree. This proposed that Zoochorous (the enticement of animals to transport seeds in their stomach) arose before any other method of seed dispersal and that primitive ancestors of Durio species were the earliest practitioners of that dispersal method, in particular red durian ( D. dulcis) exemplifying the primitive fruit of flowering plants. However, in more recent circumscriptions of Durioneae, the tribe into which Durio and its sister taxa fall, fleshy arils and spiny fruits are derived within the clade. Some genera possess these characters, but others do not. The most recent molecular evidence (on which the most recent, well-supported circumscription of Durioneae is based) therefore refutes Corner's Durian Theory.
Since the early 1990s, the domestic and international demand for durian in the Association of Southeast Asian Nations (ASEAN) region has increased significantly. In the early 2020s, a durian craze in China led to a large increase in international trade of the fruit.
In its native Southeast Asia, the durian is an everyday food and portrayed in the local media in accordance with the cultural perception it has in the region. The durian symbolised the subjective nature of ugliness and beauty in Hong Kong director Fruit Chan's 2000 film Durian Durian (榴槤飄飄, lau lin piu piu), and was a nickname for the reckless but lovable protagonist of the eponymous Singaporean TV comedy Durian King played by Adrian Pang. Likewise, the oddly shaped Esplanade building in Singapore (Theatres on the Bay) is often called "The Durian" by locals, and "The Big Durian" is the nickname of Jakarta, Indonesia.
A saying in Malay and Indonesian, mendapat durian runtuh, "getting a fallen durian", is the equivalent of the English phrase 'windfall gain'.
Nevertheless, trees bearing mature durians are dangerous because the fruit is heavy, armed with sharp thorns, and can fall from a significant height. are worn when collecting the fruit. A common saying is that a durian has eyes, and can see where it is falling, because the fruit supposedly never falls during daylight hours when people may be hurt. In Malaysia, a spineless durian clone D172 was registered by the Agriculture Department in 1989. It was called "Durian Botak" ('Bald Durian').
Sumatran elephants and tigers sometimes eat durians. Being a fruit much loved by a variety of animals, the durian is sometimes taken to signify the animalistic aspect of humans, as in the legend of Orang Mawas, the Malaysian version of Bigfoot, and Orang Pendek, its Sumatran version, both of which have been claimed to feast on durians.
Southeast Asian traditional beliefs, as well as traditional Chinese food therapy, consider the durian fruit to have warming properties liable to cause excessive sweating. The traditional method to counteract this is to pour water into the empty shell of the fruit after the pulp has been consumed and drink it. An alternative method is to eat the durian in accompaniment with mangosteen, which is considered to have cooling properties. Pregnant women or people with high blood pressure are traditionally advised not to consume durian.
The Javanese people believe durian to have aphrodisiac qualities, and impose a set of rules on what may or may not be consumed with it or shortly thereafter. A saying in Indonesian, durian jatuh sarung naik, meaning "the durian falls and the sarong comes up", refers to this belief. The warnings against the supposed lecherous quality of this fruit soon spread to the West – the philosopher Herman Vetterling commented on so-called "erotic properties" of the durian in the early 20th century.
The prevalence of the Musang King and Monthong varieties in Malaysia and Thailand, respectively, has led to concerns about a decrease in the durian's genetic diversity at the expense of higher-quality varieties. A 2022 study of durian species in Kalimantan, Indonesia, found low genetic diversity, suggestive of inbreeding depression and genetic drift. Additionally, these dominant hybrid varieties are more susceptible to pests and fungal diseases, requiring the use of and that can weaken the trees.
Biochemical basis
Ripeness and selection
Uses
Culinary
Nutrition
Origin and history
Culture and folk medicine
Cultural influences
Folk medicine
Environmental impact
See also
Sources
External links
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