Kale
Kale | |
---|---|
Acephala Group | |
Origin | Unknown; before the Middle Ages |
Cultivar group members | Many; see text. |
Kale (/keɪl/), also called leaf cabbage, belongs to a group of cabbage (Brassica oleracea) cultivars primarily grown for their edible leaves. It has also been used as an ornamental plant.
Description
Kale plants have green or purple leaves, and the central leaves do not form a head (as with
Etymology
The name kale originates from Northern Middle English cale (compare Scots kail and German Kohl) for various cabbages. The ultimate origin is Latin caulis 'cabbage'.[1][2]
Cultivation
Derived from
Kale is usually a biennial plant grown from seed with a wide range of germination temperatures.[5] It is hardy and thrives in wintertime,[5] and can survive in temperatures as low as −15 °C (5 °F).[6] Kale can become sweeter after a heavy frost.[7]
History
Kale originated in the eastern Mediterranean and Anatolia, where it was cultivated for food beginning by 2000 BCE at the latest.[8] Curly-leaved varieties of cabbage already existed along with flat-leaved varieties in Greece in the 4th century BC. These forms, which were referred to by the Romans as Sabellian kale, are considered to be the ancestors of modern kales.
The earliest record of cabbages in western Europe is of hard-heading cabbage in the 13th century.[8] Records in 14th-century England distinguish between hard-heading cabbage and loose-leaf kale.[8]
Russian traders introduced Russian kale into Canada and then into the United States in the 19th century.
Cultivars
One may differentiate between kale varieties according to the low, intermediate, or high length of the stem, along with the variety of leaf types. The leaf colours range from light green to green, dark green, violet-green, and violet-brown.
Classification by leaf type:
- Curly-leaf (Scots kale, blue curled kale)
- Bumpy-leaf (black cabbage, better known by its Italian translation 'cavolo nero', and also known as Tuscan Cabbage, Tuscan Kale, lacinato and dinosaur kale)
- Sparkly-leaf (shiny and glossy)
- Plain-leaf (flat-leaf types like red Russian and white Russian kale)
- Leaf and spear, or feathery-type leaf (a cross between curly- and plain-leaf)
- Ornamental (less palatable and tougher leaves)
Because kale can grow well into winter, one variety of rape kale is called "
Ornamental kale
Many varieties of kale and cabbage are grown mainly for ornamental leaves that are brilliant white, red, pink, lavender, blue, or violet in the interior of the rosette. The different types of ornamental kale are peacock kale, coral prince, kamone coral queen, color up kale, and chidori kale.
Uses
Nutrition
Nutritional value per 100 g (3.5 oz) | |
---|---|
Energy | 207 kJ (49 kcal) |
8.8 g | |
Sugars | 2.3 g |
Dietary fiber | 3.6 g |
0.9 g | |
4.3 g | |
Niacin (B3) | 6% 1.0 mg |
Pantothenic acid (B5) | 18% 0.9 mg |
Vitamin B6 | 16% 0.27 mg |
Folate (B9) | 35% 141 μg |
Choline | 0% 0.8 mg |
Vitamin C | 133% 120 mg |
Vitamin E | 10% 1.54 mg |
Vitamin K | 325% 390 μg |
Minerals | Quantity %DV† |
Calcium | 12% 150 mg |
Iron | 8% 1.5 mg |
Magnesium | 11% 47 mg |
Manganese | 29% 0.66 mg |
Phosphorus | 7% 92 mg |
Potassium | 16% 491 mg |
Selenium | 2% 0.9 μg |
Sodium | 2% 38 mg |
Zinc | 5% 0.6 mg |
Other constituents | Quantity |
Water | 84.0 g |
†Percentages estimated using US recommendations for adults,[16] except for potassium, which is estimated based on expert recommendation from the National Academies.[17] |
Nutritional value per 100 g (3.5 oz) | |
---|---|
Energy | 117 kJ (28 kcal) |
5.63 g | |
Sugars | 1.25 g |
Dietary fiber | 2 g |
0.4 g | |
1.9 g | |
Niacin (B3) | 3% 0.5 mg |
Pantothenic acid (B5) | 1% 0.05 mg |
Vitamin B6 | 8% 0.138 mg |
Folate (B9) | 3% 13 μg |
Choline | 0% 0.4 mg |
Vitamin C | 46% 41 mg |
Vitamin E | 6% 0.85 mg |
Vitamin K | 348% 418 μg |
Minerals | Quantity %DV† |
Calcium | 6% 72 mg |
Iron | 5% 0.9 mg |
Magnesium | 4% 18 mg |
Manganese | 18% 0.416 mg |
Phosphorus | 2% 28 mg |
Potassium | 8% 228 mg |
Selenium | 2% 0.9 μg |
Sodium | 1% 23 mg |
Zinc | 2% 0.24 mg |
Other constituents | Quantity |
Water | 91.2 g |
†Percentages estimated using US recommendations for adults,[16] except for potassium, which is estimated based on expert recommendation from the National Academies.[17] |
Raw kale is composed of 84% water, 9%
. Boiling raw kale diminishes most of these nutrients, while values for vitamins A, C, and K and manganese remain substantial.Phytochemicals
Kale is a source of the
Boiling kale decreases the level of glucosinate compounds, whereas steaming, microwaving, or stir frying does not cause significant loss.[21] Kale is high in oxalic acid, the levels of which can be reduced by cooking.[22]
Kale contains high levels of
Culinary
Snack product
Flavored "kale chips" have been produced as a potato chip substitute.[25]
Regional uses
Europe
In the Netherlands, a traditional winter dish called "boerenkoolstamppot" is a mix of curly kale and mashed potatoes, sometimes with fried bacon, and served with rookworst ("smoked sausage").[26]
In Northern Germany, there is a winter tradition known as "Kohlfahrt" ("kale trip"), where a group of people will go on a hike through the woods during the day before gathering at an inn or private residence where kale is served, usually with bacon and Kohlwurst ("kale sausage").[27] Kale is considered a Northern German staple and comfort food.[28]
In Italy,
A traditional Portuguese soup, caldo verde, combines pureed potatoes, very finely sliced kale, olive oil and salt.[30] Additional ingredients can include broth and sliced, cooked spicy sausage.
In Scotland, kale provided such a base for a traditional diet that the word in some Scots dialects is synonymous with food. To be "off one's kail" is to feel too ill to eat.[31]
In Ireland, kale is mixed with mashed potatoes to make the traditional dish colcannon.[32] It is popular on Halloween,[33] when it may be served with sausages.
In the United Kingdom, the cultivation of kale (and other vegetables) was encouraged during World War II via the Dig for Victory campaign.[34] The vegetable was easy to grow and provided important nutrients missing from a diet because of rationing.[35]
Asia
In Sri Lanka, it is known as kola gova or ela gova. It is cultivated for edible use. A dish called 'kale mallung' is served almost everywhere on the island, along with rice.
United States
For most of the 20th century, kale was primarily used in the U.S. for decorative purposes; it became more popular as an edible vegetable in the 1990s due to its nutritional value.[10]
In culture
The Kailyard school of Scottish writers, which included J. M. Barrie (creator of Peter Pan), consisted of authors who wrote about traditional rural Scottish life (kailyard = 'kale field').[36] In Cuthbertson's book Autumn in Kyle and the charm of Cunninghame, he states that Kilmaurs in East Ayrshire was famous for its kale, which was an important foodstuff. A story is told in which a neighbouring village offered to pay a generous price for some kale seeds, an offer too good to turn down. The locals agreed, but a gentle roasting on a shovel over a coal fire ensured the seeds never germinated.[37]
Gallery
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Curly-leaf kale
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Red Russian kale
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Tuscan kale
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Makingkale chipsin Illinois
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A traditionalDanish dish: boiled ham, glazed potatoes and stewed kale
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A kale-based dish with other vegetables andsourdough bread, served at a restaurant in Australia
See also
- Bowen's Kale
- Crambe maritima – sea kale
- Leaf vegetable
- Kalettes
- Cabbage
References
- ^ "Kale". Online Etymology Dictionary, Douglas Harper. 2016. Archived from the original on 11 September 2016. Retrieved 16 August 2016.
- ^ "Greeks and Romans Grew Kale and Collards". aggie-hort.tamu.edu. Retrieved 29 June 2023.
- ^ Facts, Best Food (26 April 2017). "Food Facts: Broccoli's Wild Roots | BestFoodFacts.org". Best Food Facts. Retrieved 29 June 2023.
- ISBN 978-81-88597-06-2. Archivedfrom the original on 17 June 2016.
- ^ a b "Growing guide for kale". Cornell University, Ithaca, NY. 2006. Archived from the original on 4 November 2016. Retrieved 7 November 2016.
- ^ Derek B. Munro Vegetables of Canada, p. 120, at Google Books
- ISBN 978-0-395-70818-7.
kale frost.
- ^ a b c d Perry, Leonard. "Interesting cool crops". University of Vermont Extension, Department of Plant and Soil Science. Archived from the original on 19 June 2022. Retrieved 5 June 2018.
- ^ Diamond, Anna (January 2018). "America's First "Food Spy" Traveled the World Hunting for Exotic Crops". Smithsonian. Retrieved 5 June 2018.
- ^ a b c d e Graber, Cynthia; Twilley, Nicola. "Meet the Man Who Found, Finagled, and Ferried Home the Foods We Eat Today". Gastropod. Retrieved 5 June 2018.
- ISBN 0-405-06762-3.
- ^ "Couve Galega (Portuguese Cabbage)". myfolia.com. Archived from the original on 28 August 2017. Retrieved 3 June 2017.
- ^ "Is Ornamental Kale Edible? Yes, But Not That Tasty". Garden.eco. 14 December 2017. Retrieved 2 March 2018.
- ISBN 978-0-7112-2204-5. Archivedfrom the original on 29 June 2014. Retrieved 30 August 2012.
- ^ Jamieson, Sophie (30 October 2015). "Kale, broccoli and cabbage replace traditional flowers as brides opt for vegetable wedding bouquets". The Telegraph. Archived from the original on 18 March 2017. Retrieved 25 March 2017.
- ^ a b United States Food and Drug Administration (2024). "Daily Value on the Nutrition and Supplement Facts Labels". Retrieved 28 March 2024.
- ^ )
- PMID 26477753.
- PMID 10564014.
- PMID 24147970.
- S2CID 25728864.
- S2CID 51712893.
- .
- PMID 20095605.
- ^ "A kid-friendly potato chip alternative". The Washington Post. 23 June 2015. Archived from the original on 2 April 2017. Retrieved 2 April 2017.
- ISBN 978-1-61237-028-6. Retrieved 2 April 2017.]
{{cite book}}
:|first=
has generic name (help)[permanent dead link - ^ "Bremen's unique tradition | European Traveler". europeantraveler.net. Archived from the original on 28 March 2022. Retrieved 24 February 2020.
- ^ Gorman, Louise (11 April 2016). "On the kale tour trail in Germany, schnapps in hand". sbs.com.au. Retrieved 24 February 2020.
- ISBN 978-1-4464-6035-1. Retrieved 2 April 2017.
- ISBN 978-0-7566-7673-5. Retrieved 2 April 2017.
- ^ "THE LAZY GARDENER 'Off one's kail' you'll be if you eat these winter beauties". 4 December 2009. Archived from the original on 27 August 2017. Retrieved 3 June 2017.
- ISBN 978-0-7611-1772-8. Retrieved 2 April 2017.
- ISBN 978-0-19-516896-9. Archivedfrom the original on 2 May 2016. Retrieved 2 April 2017.
- ^ Titchmarsh, Alan (3 May 2015). "Land army: Alan Titchmarsh on how gardening became essential for survival during wartime". The Express. Retrieved 5 August 2017.
- ^ "Kitchen Memories". The National WWII Museum Blog. National WWII Museum. 15 August 2014. Retrieved 24 August 2020.
- ^ Scott, Maggie. "Scots Word of the Season: Kailyard". arts.gla.ac.uk. Archived from the original on 3 March 2016. Retrieved 13 June 2017.
- ^ Cuthbertson, David Cuningham (1945). Autumn in Kyle and the Charm of Cunninghame. London: Jenkins. Page 186
External links
- Marrow-Stem Kale – Plants for a Future database
- PROTAbase on Brassica oleracea (leaf cabbage)