Phoenix dactylifera, commonly known as date or date palm, is a flowering plant species in the palm family, Arecaceae, cultivated for its edible sweet fruit called dates. The species is widely cultivated across northern Africa, the Middle East, and South Asia, and is naturalized in many tropical and subtropical regions worldwide. P. dactylifera is the type species of genus Phoenix, which contains 12–19 species of wild date palms.
|Dates on a date palm|
Date trees typically reach about 21–23 metres (69–75 ft) in height, growing singly or forming a clump with several stems from a single root system. Date fruits (dates) are oval-cylindrical, 3 to 7 centimetres (1 to 3 in) long, and about 2.5 centimetres (1 in) in diameter, with colour ranging from bright red to bright yellow, depending on variety. Containing 61–68 percent sugar by mass when dried, dates are very sweet and are enjoyed as desserts on their own or within confections.
Dates have been cultivated in the Middle East and the Indus Valley for thousands of years. There is archaeological evidence of date cultivation in Arabia from the 6th millennium BCE. The total annual world production of dates amounts to 8.5 million metric tons, countries of the Middle East and North Africa being the largest producers and consumers.
The species name dactylifera 'date-bearing' comes from the Greek words daktylos (δάκτυλος), which means 'date' (also 'finger'), and fero (φέρω), which means 'I bear'. The fruit is known as a date. The fruit's English name (through Old French), as well as the Latin both come from the Greek word for 'finger', δάκτυλος, because of the fruit's elongated shape.
The place of origin of date palm is uncertain because of long cultivation. According to some sources it probably originated from the Fertile Crescent region straddling Egypt and Mesopotamia while others state that they are native to the Persian Gulf area or even western India. Fossil records show that the date palm has existed for at least 50 million years.
Dates have been a staple food of the Middle East and the Indus Valley for thousands of years, and there is archaeological evidence of date cultivation in Mehrgarh, a Neolithic civilization in western Pakistan, around 7000 BCE and in eastern Arabia between 5530 and 5320 calBC. Dates have been cultivated since ancient times from Mesopotamia to prehistoric Egypt. The ancient Egyptians used the fruits to make date wine and ate dates at harvest. Evidence of cultivation is continually found throughout later civilizations in the Indus Valley, including the Harappan period from 2600 to 1900 BCE.
In Ancient Rome the palm fronds used in triumphal processions to symbolize victory were most likely those of P. dactylifera. The date palm was a popular garden plant in Roman peristyle gardens, though it would not bear fruit in the more temperate climate of Italy. It is recognizable in frescoes from Pompeii and elsewhere in Italy, including a garden scene from the House of the Wedding of Alexander. In later times, traders spread dates around southwest Asia, northern Africa, and Spain. Dates were introduced into Mexico and California by the Spaniards in 1765, around Mission San Ignacio.
One cultivar, the Judean date palm, is renowned for its long-lived orthodox seed, which successfully sprouted after accidental storage for 2,000 years. The upper survival time limit of properly stored seeds remains unknown. A genomic study from New York University Abu Dhabi Center for Genomics and Systems Biology showed that domesticated date palm varieties from North Africa, including well-known varieties such as Medjool and Deglet Nour, are a hybrid between Middle East date palms and the Cretan wild palm, P. theophrasti. Date palms appear in the archaeological record in North Africa about 2,800 years ago, suggesting that the hybrid was spread by the Minoans or Phoenicians.
Date trees typically reach about 21–23 metres (69–75 ft) in height, growing singly or forming a clump with several stems from a single root system. The leaves are 4–6 metres (13–20 ft) long, with spines on the petiole, and pinnate, with about 150 leaflets. The leaflets are 30 cm (12 in) long and 2 cm (1 in) wide. The full span of the crown ranges from 6–10 m (20–33 ft).
The date palm is dioecious, having separate male and female plants. They can be easily grown from seed, but only 50% of seedlings will be female and hence fruit bearing, and dates from seedling plants are often smaller and of poorer quality. Most commercial plantations thus use cuttings of heavily cropping cultivars. Plants grown from cuttings will fruit 2–3 years earlier than seedling plants.
Dates are naturally wind pollinated, but in both traditional oasis horticulture and in the modern commercial orchards they are entirely pollinated manually. Natural pollination occurs with about an equal number of male and female plants. However, with assistance, one male can pollinate up to 100 females. Since the males are of value only as pollinators, this allows the growers to use their resources for many more fruit-producing female plants. Some growers do not even maintain any male plants, as male flowers become available at local markets at pollination time. Manual pollination is done by skilled labourers on ladders, or by use of a wind machine. In some areas such as Iraq the pollinator climbs the tree using a special climbing tool that wraps around the tree trunk and the climber's back (called تبلية in Arabic) to keep him attached to the trunk while climbing.
Date fruits are oval-cylindrical, 3–7 cm (1–3 in) long, and 2–3 cm (3⁄4–1+1⁄4 in) diameter, and when ripe, range from bright red to bright yellow in colour, depending on variety. Dates contain a single stone about 2–2.5 cm (3⁄4–1 in) long and 6–8 mm (1⁄4–5⁄16 in) thick. Three main cultivar groups of date exist: soft (e.g. 'Barhee', 'Halawy', 'Khadrawy', 'Medjool'); semi-dry (e.g. 'Dayri', 'Deglet Nour', 'Zahdi'), and dry (e.g. 'Thoory'). The type of fruit depends on the glucose, fructose, and sucrose content.
In 2009, a team of researchers at the Weill Cornell Medical College in Qatar published a draft version of the date palm genome (Khalas variety). The draft genome sequence was improved in 2019 with the release of a more complete genome sequence using small molecule real-time sequencing technology by a team from the New York University Abu Dhabi Center for Genomics and Systems Biology and the UAE University Khalifa Center for Genetic Engineering and Biotechnology in the United Arab Emirates. With the release of this improved genome assembly, the UAE researchers were able to map genes for fruit color and sugar content. The NYU Abu Dhabi researchers had also re-sequenced the genomes of several date varieties to develop the first single nucleotide polymorphism map of the date palm genome in 2015.
|Date production – 2019|
UN Food and Agriculture Organization (FAO)
Dates are a traditional crop throughout the Middle East and north Africa. Dates (especially Medjool and Deglet Nour) are also cultivated in the southwestern United States, and in Sonora and Baja California in Mexico.
Date palms can take 4 to 8 years after planting before they will bear fruit, and start producing viable yields for commercial harvest between 7 and 10 years. Mature date palms can produce 70–140 kg (150–300 lb) of dates per harvest season. They do not all ripen at the same time so several harvests are required. To obtain fruit of marketable quality, the bunches of dates must be thinned and bagged or covered before ripening so that the remaining fruits grow larger and are protected from weather and animals, such as birds, that also like to eat them.
A large number of date cultivars and varieties emerged through history of its cultivation, but the exact number is difficult to assess. Hussain and El-Zeid (1975) have reported 400 varieties, while Nixon (1954) named around 250. Most of those are limited to a particular region, and only a few dozen have attained broader commercial importance. The most renowned cultivars worldwide include Deglet Noor, originally of Algeria; Yahidi and Hallawi of Iraq; Medjool of Morocco; Mazafati of Iran.
Diseases and pestsEdit
A major palm pest, the red palm beetle (Rhynchophorus ferrugineus), currently poses a significant threat to date production in parts of the Middle East as well as to iconic landscape specimens throughout the Mediterranean world. Pinhas et al. 2008 uses piezoelectric sensors and speech recognition technology to detect R. ferrugineus. They achieved a 98% detection ratio on young P. dactylifera in very controlled laboratory conditions.
In the 1920s, eleven healthy Medjool palms were transferred from Morocco to the United States where they were tended by members of the Chemehuevi tribe[which?] in a remote region of Nevada. Nine of these survived and in 1935, cultivars were transferred to the "U.S. Date Garden" in Indio, California. Eventually this stock was reintroduced to Africa and led to the U.S. production of dates in Yuma, Arizona, and Bard, California.
Not all cities and countries have benefited with the date palms resilience and ease of growth. It has made the invasive species list in some parts of the United States, Canada and Australia but these references are to the related but inedible Canary Island Date Palm (Phoenix canariensis).
Dry or soft dates are eaten out-of-hand, or may be pitted and stuffed with fillings such as almonds, walnuts, pecans, candied orange and lemon peel, tahini, marzipan or cream cheese. Pitted dates are also referred to as stoned dates. Partially dried pitted dates may be glazed with glucose syrup for use as a snack food. Dates can also be chopped and used in a range of sweet and savory dishes, from tajines (tagines) in Morocco to puddings, ka'ak (types of Arab cookies) and other dessert items. Date nut bread, a type of cake, is very popular in the United States, especially around holidays. Dates are also processed into cubes, paste called 'ajwa, spread, date syrup or "honey" called "dibs" or rub in Libya, powder (date sugar), vinegar or alcohol. Vinegar made from dates was a traditional product of the Middle East. Recent innovations include chocolate-covered dates and products such as sparkling date juice, used in some Islamic countries as a non-alcoholic version of champagne, for special occasions and religious times such as Ramadan. When Muslims break fast in the evening meal of Ramadan, it is traditional to eat a date first.
Reflecting the maritime trading heritage of Britain, imported chopped dates are added to, or form the main basis of a variety of traditional dessert recipes including sticky toffee pudding, Christmas pudding and date and walnut loaf. They are particularly available to eat whole at Christmas time. Dates are one of the ingredients of HP Sauce, a popular British condiment.
In Southeast Spain (where a large date plantation exists including UNESCO-protected Palmeral of Elche) dates (usually pitted with fried almond) are served wrapped in bacon and shallow fried. In Israel date syrup, termed silan, is used while cooking chicken and also for sweets and desserts, and as a honey substitute. Dates are one of the ingredients of jallab, a Middle-Eastern fruit syrup. In Pakistan, a viscous, thick syrup made from the ripe fruits is used as a coating for leather bags and pipes to prevent leaking.
In the past, sticky dates were served using specialized small forks having two metal tines, called daddelgaffel in Scandinavia. Some designs were patented. These have generally been replaced by an inexpensive pale-colored knobbled plastic fork that resembles a date branch (example), which is traditionally included with numerous brands of prepackaged trays of dates (example), though this practice has declined in response to increased use of resealable packaging and calls for fewer single-use plastics.
Date seeds are soaked and ground up for animal feed. Their oil is suitable for use in cosmetics and dermatological applications. The oil contains lauric acid (36%) and oleic acid (41%). Date palm seeds contain 0.56–5.4% lauric acid. They can also be processed chemically as a source of oxalic acid. Date seeds are also ground and used in the manner of coffee beans, or as an additive to coffee. Experimental studies have shown that feeding mice with the aqueous extract of date pits exhibit anti-genotoxic effects and reduce DNA damage induced by N-nitroso-N-methylurea.
Stripped fruit clusters are used as brooms. Recently, the floral stalks have been found to be of ornamental value in households.
Date palm leaves are used for Palm Sunday in the Christian religion. In North Africa, they are commonly used for making huts. Mature leaves are also made into mats, screens, baskets, and fans. Processed leaves can be used for insulating board. Dried leaf petioles are a source of cellulose pulp, used for walking sticks, brooms, fishing floats, and fuel. Leaf sheaths are prized for their scent, and fibre from them is also used for rope, coarse cloth, and large hats. The leaves are used as a lulav in the Jewish holiday of Sukkot. They are also commonly used as the s'chach in the construction of a sukkah.
Young date leaves are cooked and eaten as a vegetable, as is the terminal bud or heart, though its removal kills the palm. The finely ground seeds are mixed with flour to make bread in times of scarcity. The flowers of the date palm are also edible. Traditionally the female flowers are the most available for sale and weigh 300–400 grams (10+1⁄2–14 oz). The flower buds are used in salad or ground with dried fish to make a condiment for bread.
|Nutritional value per 100 g (3.5 oz)|
|Energy||1,180 kJ (280 kcal)|
|Dietary fiber||8 g|
|Vitamin A equiv.|
|Vitamin A||10 IU|
|Pantothenic acid (B5)|
|†Percentages are roughly approximated using US recommendations for adults. |
Source: USDA FoodData Central
Dates are 21% water, 75% carbohydrates, 2% protein, and less than 1% fat (table). In a 100-gram (3+1⁄2 oz) reference amount, dates supply 1,180 kilojoules (280 kilocalories) of food energy and are a moderate source (10-19% of the Daily Value) of pantothenic acid, vitamin B6, and the dietary minerals magnesium, manganese, and potassium, with other micronutrients in low amounts (table).
A 2011 study found that the glycemic index (GI) for five different varieties of date had a range of 46–55, while a 2002 report showed GI values of 31–50, results indicating dates are a relatively low GI food source.
Many Jewish scholars believe that the "honey" reference in the Bible to "a land flowing with milk and honey" (Exodus chapter 3) is actually a reference to date "honey", and not honey from bees.
In the Torah, palm trees are referenced as symbols of prosperity and triumph. In Psalm 92:12 "The righteous shall flourish like the palm tree". Palm branches occurred as iconography in sculpture ornamenting the Second Jewish Temple in Jerusalem, on Jewish coins, and in the sculpture of synagogues. They are also used as ornamentation in the Feast of the Tabernacles. Date palms are one of the seven species of native Israeli plants revered in Judaism. The date palm has historically been considered a symbol of Judea and the Jewish people.
- The Plant List, Phoenix dactylifera L.
- "Phoenix dactylifera". Germplasm Resources Information Network (GRIN). Agricultural Research Service (ARS), United States Department of Agriculture (USDA). Retrieved 10 December 2017.
- Kew World Checklist of Selected Plant Families, Phoenix dactylifera
- Biota of North America Project, Phoenix dactylifera
- Flora of China, v 253 p 143, Phoenix dactylifera
- Krueger, Robert R. "Date Palm Genetic Resource Conservation, Breeding, Genetics, And Genomics In California" (PDF). The Conference Exchange. Retrieved 26 March 2018.
- Divya Bichu. "Arabian Desert Plants". Buzzle. Retrieved 19 April 2015.
- "Dates, deglet noor". FoodData Central. USDA Agricultural Research Service. Retrieved 25 May 2020.
- "FAOSTAT:Crops". Elements:Production Quantity / Items:Dates. Retrieved 26 March 2018.
- δάκτυλος. Liddell, Henry George; Scott, Robert; A Greek–English Lexicon at the Perseus Project
- fĕro. Charlton T. Lewis and Charles Short. A Latin Dictionary on Perseus Project.
- "Date Palm". 15 October 2008. HowStuffWorks.com.
- "Date palm". iranicaonline.org. Retrieved 6 March 2021.
- "Medjool: A Date to Remember". NPR.org. 17 October 2007. Retrieved 19 April 2015.
- Kenoyer, Jonathan Mark; Heuston, Kimberley Burton (2005). The Ancient South Asian World. The World in Ancient Times. Oxford University Press. ISBN 978-0-19-522243-2. Retrieved 30 July 2013.[page needed]
- Tengberg, M. (November 2012). "Beginnings and early history of date palm garden cultivation in the Middle East". Journal of Arid Environments. 86: 139–147. Bibcode:2012JArEn..86..139T. doi:10.1016/j.jaridenv.2011.11.022.
- Ernest Small (2009). Top 100 Food Plants. p. 231. ISBN 9780660198583.
- Linda Farrar (1998). Ancient Roman Gardens. p. 141.
- Linda Farrar (1998). Ancient Roman Gardens. p. 141.
- Fountain, Henry (17 June 2008). "Date Seed of Masada is Oldest Ever to Sprout". New York Times. Retrieved 9 December 2021.
- Bonner, Franklin T. (April 2008). "Chapter 4 Storage of Seeds" (PDF). Woody Plant Seed Manual, USDA FS Agriculture Handbook 727. National Seed Laboratory, 5675 Riggins Mill Rd, Dry Branch, GA 31020. Retrieved 21 June 2008.
- Flowers, Jonathan; et al. (2019). "Cross-species hybridization and the origin of North African date palms". Proceedings of the National Academy of Sciences USA. 116 (5): 1651–1658. doi:10.1073/pnas.1817453116. PMC 6358688. PMID 30642962.
- Date Palm Genome Drafted Science Daily, January 14, 2010, Retrieved August 30, 2010
- Date Palm Draft Sequence Weill Cornell Medical College in Qatar, updated April 7, 2010, Retrieved August 30, 2010
- Genome-wide association mapping of date palm fruit traits Nature Communications 10: 4680 (2019)
- Whole genome re-sequencing of date palms yields insights into diversification of a fruit tree crop Nature Communications 6:8824 (2015)
- "The Date, Phoenix dactylifera". Retrieved 19 April 2015.
- "Publications | Extension | University of Nevada, Reno" (PDF).
- "Date Palm - Phoenix dactylifera". www.growables.org. Retrieved 6 April 2019.
- Ibn al-'Awwam, Yaḥyá (1864). Le livre de l'agriculture d'Ibn-al-Awam (kitab-al-felahah) (in French). Translated by J.-J. Clement-Mullet. Paris: A. Franck. pp. 321–326 (ch. 7 - Article 43). OCLC 780050566.
- Hussain, Fazal; El-Zeid, A (1975). "Studies on physical and chemical characteristics of date varieties of Saudi Arabia". Ministry of Agriculture and Water, Saudi Arabia. Cite journal requires
- Nixon, R.W. (1954). "Date culture in Saudi Arabia". Ann. Date Growers' Instit. (31): 15–20.
- Sidhu, Jiwan S. (28 February 2008). "22. Date Fruits Production and Processing". In Hui, Y. H.; Barta, József; Cano, M. Pilar (eds.). Handbook of Fruits and Fruit Processing. John Wiley & Sons. pp. 396–. ISBN 978-0-470-27648-8.
- Liu, Huajian; Lee, Sang-Heon; Chahl, Javaan Singh (30 August 2016). "A review of recent sensing technologies to detect invertebrates on crops". Precision Agriculture. Springer. 18 (4): 635–666. doi:10.1007/s11119-016-9473-6. ISSN 1385-2256.
- Allen, Lee (25 April 2014). "How One Indian Couple Saved 'The Fruit of Kings'". Indian Country News. Retrieved 2 November 2021.
- "Phoenix canariensis (Canary Island date palm)". www.cabi.org. Retrieved 5 December 2019.
- "Phoenix canariensis Profile". California Invasive Plant Council. 20 March 2017. Retrieved 5 December 2019.
- "Canary Island date palm: Phoenix canariensis (Arecales: Arecaceae): Invasive Plant Atlas of the United States". www.invasiveplantatlas.org. Retrieved 5 December 2019.
- Das, Bhagwan; Sarin, J. L. (1936). "Vinegar from Dates". Industrial & Engineering Chemistry. 28 (7): 814. doi:10.1021/ie50319a016.
- Forbes, Robert James (1971). "Studies in Ancient Technology". Cite journal requires
- dragonflywink. "Jensen fork". Silver Salon Forums. SM Publications. Retrieved 19 April 2020.
- Official Gazette of the United States Patent Office. US Patent Office. 1953. p. 589.
- "Dates in a wooden plate on a wooden table – stock image". Depositphotos. Depositphotos, Inc. Retrieved 19 April 2020.
- Diab, K.A; E. I. Aboul-Ela (2012). "In Vivo Comparative Studies on Antigenotoxicity of Date Palm (Phoenix Dactylifera L.) Pits Extract Against DNA Damage Induced by N-Nitroso-N-methylurea in Mice". Toxicology International. 19 (3): 279–286. doi:10.4103/0971-6580.103669. PMC 3532774. PMID 23293467.
- Kiran, S (2014). "Floral Stalk on Date Palm: A New Discovery". International Journal of Agricultural Research, Innovation and Technology. 4 (2): 53–54. doi:10.3329/ijarit.v4i2.22649.
- Karo, Joseph ben Ephraim (1999). The Metsudah Kitzur Shulchan Aruch. Metsudah Publications. OCLC 421411475.
- "KKL Preparing for Distribution of "Schach"". Israel National News. Retrieved 5 March 2021.
- Alkaabi, Juma M; Al-Dabbagh, Bayan; Ahmad, Shakeel; Saadi, Hussein F; Gariballa, Salah; Ghazali, Mustafa Al (28 May 2011). "Glycemic indices of five varieties of dates in healthy and diabetic subjects". Nutrition Journal. 10 (1): 59. doi:10.1186/1475-2891-10-59. ISSN 1475-2891. PMC 3112406. PMID 21619670.
- Miller, CJ; Dunn, EV; Hashim, IB (2002). "Glycemic index of 3 varieties of dates". Saudi Medical Journal. 23 (5): 536–8. PMID 12070575.
- Maier, VP; Metzler, DM; Huber, AF (1964). "3-O-Caffeoylshikimic acid (dactylifric acid) and its isomers, a new class of enzymic browning substrates". Biochemical and Biophysical Research Communications. 14 (2): 124–8. doi:10.1016/0006-291x(64)90241-4. PMID 5836492.
- , JEWISH ACTION Magazine, Winter 5765/2005 issue
- James Hastings (1909). Dictionary of the Bible. The Monist. p. 675.
- The Quran, Chapter 19 - verses 22-25, retrieved on Feb. 28 2015, So she [Virgin Mary] conceived him, and she retired with him to a remote place. And the pains of childbirth drove her to the trunk of a palm tree. she cried (in her anguish): 'Ah! would that I had died before this! would that I had been a thing forgotten and out of sight!' But (a voice) cried to her from beneath the (palm-tree): 'Grieve not! for thy Lord hath provided a rivulet beneath thee; And shake towards thyself the trunk of the palm-tree; it will let fall fresh ripe dates upon thee.'
- Islam Q & A, question # 214222: Does Islam recommend any particular foods to maintain a woman’s good health during pregnancy?, retrieved on Feb. 28 2015
- Psalm 92.12
- Cooper, John (1993). Eat and be satisfied : a social history of Jewish food. Northvale, N.J.: Jason Aronson. ISBN 0-87668-316-2. OCLC 27266322.
- Jerusalem und die Länder : Ikonographie, Topographie, Theologie ; Festschrift für Max Küchler zum 65. Geburtstag. Max Küchler, Gerd Theissen. Göttingen: Vandenhoeck & Ruprecht. 2009. ISBN 978-3-525-53390-1. OCLC 457130327.CS1 maint: others (link)
- Date palm cultivation (Food and Agriculture Organization)
- Date palm products (additional information from the FAO)
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|Wikisource has the text of the 1911 Encyclopædia Britannica article "Date Palm".|