Difference between revisions of "Lentil" - New World Encyclopedia

From New World Encyclopedia
(added approved tag)
Line 1: Line 1:
{{Images OK}}
+
{{Approved}}{{Images OK}}
 
{{Taxobox
 
{{Taxobox
 
| name = Lentil
 
| name = Lentil

Revision as of 00:14, 17 April 2008

Lentil
Lentils
Lentils
Scientific classification
Kingdom: Plantae
Division: Magnoliophyta
Class: Magnoliopsida
Order: Fabales
Family: Fabaceae
Subfamily: Faboideae
Tribe: Vicieae
Genus: Lens
Species: L. culinaris
Binomial name
Lens culinaris
Medikus

Lentil is the common name for a small, bushy annual plant, Lens culinaris, of the legume family Fabaceae, characterized by slender, branched stems and edible, lens-shaped seeds growing in short, flat pods. Lentil also refers to these round, flattened, protein-rich seeds, which are one of the earliest known cultivated foods. Daal and pulse are other names applied to this plant. The term sometimes is applied to members of all four species in the Lens genus and to their edible seeds.

The lentil seed, so fundamental to the species' individual need for reproduction, likewise serves a purpose for the ecosystem and for humans, providing food for animals and a very nutritious food for people. Indeed, its high protein content has led to it being a meat substitute for many people, and it is a good source of various vitamins, minerals, and fiber. In addition, it provides a unique taste for people, allowing it to be used as a valued main dish or side dish, often included in soups, salads, and stews (Herbst 2001).

Description

Lentils are members of the Fabaceae family, a group of flowering plants known as legumes. It is one of the largest plant families and includes beans, peas, peanuts, lupines, alfalfa, clover, acacia, and many others. All members of this family have five-petaled flowers in which the superior ovary (an ovary attached to the receptacle above the attachment of other floral parts) ripens to form a "pod," technically called a legume, whose two sides split apart, releasing the seeds that are attached to one or both seams.

Legume plants are noteworthy for their ability to fix atmospheric nitrogen, an accomplishment attributable to a symbiotic relationship with certain bacteria known as rhizobia found in root nodules of these plants. Legume seed and foliage has a comparatively higher protein content than non-legume material, probably due to the additional nitrogen that legumes receive through nitrogen-fixation symbiosis. This high protein content makes them desirable crops in agriculture.

The genus Lens of the family Fabaceae contains four species of small, erect or climbing herbs with pinnate leaves, small inconspicuous white flowers, and small flattened pods. While the term lentil sometimes is used to apply to the plants and edible seeds of all four of these species, most commonly, the term lentil refers to Lens culinaris and its seeds.

Lens culinaris, sometimes referred to as Lens esculenta, is a bushy annual plant grown for its thin, lens-shaped seeds. It is about 15 inches tall and the seeds grow in pods, usually with two seeds in each, or sometimes three. Lentil seeds may be green, yellow, or orange-red (Bender and Bender 2005). Other colors may include brown and black. Red, white, and yellow lentils are decorticated; that is, they have their skins removed.

Types of lentils

Three types of lentils
  • Brown/Spanish Pardina
  • French Green/Puy (Dark speckled blue-green)
  • Green (Most common variety)
  • Black/Beluga
  • Yellow/Tan Lentils (Red inside)
    • Red Chief (Decorticated yellow lentils)
  • Eston Green (Small green)
  • Richlea (Medium green)
  • Laird (Large green)
  • Petite Golden (Decorticated lentils)
  • Masoor (Brown-skinned lentils which are red inside)
    • Petite Crimson/Red (Decorticated masoor lentils)
  • Chana (Kernel of chickpeas)
  • Urad (A type of bean)
  • White/Ivory (Peeled Urad beans)
  • Garlic Lentils (Genetically altered)
  • Macachiados (Big Mexican yellow lentils)

Cultivation and production

Lentil output in 2005

The plant originated in the Near East, and has been part of the human diet since the aceramic Neolithic, being one of the first crops domesticated in the Near East. The lentil was known in Greece and Egypt before biblical times and there is reference in the Bible to lentils, with Esau having sold his birthright for lentils, although this also could have referred to other plants.

Lentils are relatively tolerant to drought and are grown throughout the world. Lentils are very popular in Europe and a staple crop throughout the Middle East and India (Herbst 2001). They also are widely cultivated in North Africa, and are of growing popularity in North America.

About half of the worldwide production of lentils is from India, most of which is consumed in the domestic market. Canada is the largest export producer of lentils in the world and Saskatchewan is the most important producing region in Canada. The Food and Agriculture Organization (FAO) estimates that world production of lentils totaled 3.2 million metric tons (MT) in 2003. Canada produced 520,000 MT and, according to the market analysis company STAT Communications, will likely export 400,000 MT during the 2003-04 marketing year, which runs from August to July. The FAO estimates world trade in lentils totaled 1.2 million MT in 2002, with Canada exporting 382,000 MT during the calendar year. The Palouse Region of Eastern Washington and the Idaho Panhandle, with its commercial center at Moscow, Idaho, constitutes the most important producing region in the United States (DPSES 2000).

Culinary use

The three main varieties of lentils are the French or European lentil, the Egyptian or red lentil, and the yellow lentil (Herbst 2001). The French lentil has a grayish-brown seed coat and creamy yellow interior, and is sold with its seed coat on. The red lentil is smaller and rounder and sold without its reddish orange seed coat (Herbst 2001). All of these three are dried as soon as they are ripe, rather than used fresh (Herbst 2001).

The seeds have a short cooking time (especially for small varieties with the husk removed, such as the common red lentil) and a distinctive earthy flavor. Lentils are used to prepare an inexpensive and nutritious soup all over Europe and North and South America, sometimes combined with some form of chicken or pork. They are frequently combined with rice, which has a similar cooking time. A lentil and rice dish is referred to in the Middle East as mujaddara or mejadra. Rice and lentils are also cooked together in khichdi, a popular Indian dish. Lentils are used throughout India, the Mediterranean regions, and the Middle East. In rare cases, the lentils are mixed with dairy cheese.

A large percentage of Indians are vegetarian and lentils have long been part of the indigenous diet as a common source of protein. Usually, lentils are boiled to a stew-like consistency with vegetables and then seasoned with a mixture of spices to make many side dishes such as sambar, rasam, and dal, which are usually served over rice and roti.

When lentils are prepared, they are first inspected for damaged lentils, stones, and other foreign matter. Then they are rinsed until the water runs through and comes out clear. Some prefer to soak the lentils for an extended time and discard the water. This removes substances that may cause indigestion. The lentils are then boiled in water or broth. They may be cooked on the stove top, or in a slow cooker. Pressure cookers are not recommended, since the small lentils may clog the pressure relief valve, and their quick cooking time means there is little benefit from pressure cooking. Cooked lentils often require thinning: adding more hot water or broth to the cooked legumes until the desired final consistency is reached.

Stored airtight at room temperature, lentils will keep up to a year (Herbst 2001).

Nutritional value and health benefits

Lentils, raw
Nutritional value per 100 g
Energy 350 kcal   1480 kJ
Carbohydrates     60 g
- Sugars  2 g
- Dietary fiber  31 g  
Fat 1 g
Protein 26 g
Thiamin (Vit. B1)  0.87 mg   67%
Iron  7.5 mg 60%
Percentages are relative to US
recommendations for adults.
Source: USDA Nutrient database

Apart from a high level of [protein]]s, lentils also contain a rich source of copper and selenium, a good source of iron, and a source of vitamin B6, folate, and zinc (Bender and Bender 2005). They have a fair amount of vitamin A, calcium, and phosphorus (Herbst 2001). Lentils also are a good source of dietary fiber. Red (or pink) lentils contain a lower concentration of fiber than green lentils (11% rather than 31%) (ARS 2008).

In addition to providing slow-burning, complex carbohydrates, lentils are one of the best vegetable sources of iron. This makes them an important part of a vegetarian diet, and useful for preventing iron deficiency. Iron is particularly important for adolescents, and menstruating or pregnant women, whose requirements for it are increased.

Health magazine has selected lentils as one of the five healthiest foods (Raymond 2006). Lentils are often mixed with grains, such as rice, which results in a complete protein dish.

In a study that examined food intake patterns and risk of death from coronary heart disease, researchers followed more than 12,000 middle-aged men in the United States, Finland, the Netherlands, Italy, former Yugoslavia, Greece, and Japan for 25 years (Menotti et al. 1999). Typical food patterns were higher consumption of dairy products in Northern Europe; higher consumption of meat in the U.S.; higher consumption of vegetables, legumes, fish, and wine in southern Europe; and higher consumption of cereals, soy products, and fish in Japan. When researchers analyzed this data in relation to the risk of death from heart disease, they found that legumes were associated with an 82% reduction in risk.

A study published in the Archives of Internal Medicine also suggests that eating high fiber foods, such as lentils, helps prevent heart disease (Bazzano et al. 2003). Almost 10,000 American adults participated in this study and were followed for 19 years. People eating the most fiber, 21 grams per day, had 12% less coronary heart disease (CHD) and 11% less cardiovascular disease (CVD) compared to those eating the least, 5 grams daily. Those eating the most water-soluble dietary fiber fared even better with a 15% reduction in risk of CHD and a 10% risk reduction in CVD.

Lentils' contribution to heart health lies not just in their fiber, but in the significant amounts of folate and magnesium they supply. Folate helps lower levels of homocysteine, an amino acid that is an intermediate product in an important metabolic process called the methylation cycle. When folate and vitamin B6 are present, homocysteine is converted into cysteine or methionine, both of which are benign. When these B vitamins are not available, levels of homocysteine increase in the bloodstream—with potential for the homocysteine to damage artery walls and servingas a risk factor for heart disease.

Lentils' magnesium is a calcium channel blocker. Sufficient magnesium aid veins and arteries to relax, which lessens resistance and improves the flow of blood, oxygen, and nutrients throughout the body. Studies show that a deficiency of magnesium is not only associated with heart attack but that immediately following a heart attack, lack of sufficient magnesium promotes free radical injury to the heart.

In addition to its beneficial effects on the digestive system and the heart, soluble fiber helps stabilize blood sugar levels. Legumes like lentils can help balance blood sugar levels while providing steady, slow-burning energy.

Lentils and lenses

The optical lens is named after the lentil (Latin: lens), whose shape it resembles. This same connection appears in many other languages:

Language lens lentil
Latin lens lens
Greek φακός φακή
Persian adasi adas
Arabic adasa adas
Turkish mercek mercimek
French lentille lentille
Italian lenti lenticchie
Latvian lēca lēca
Polish soczewka soczewica
Serbian sočivo sočivo
Croatian leća leća
Slovene leča leča
Swedish lins lins
Hungarian lencse lencse
Spanish lente lenteja
German Linse Linse
Catalan lent llentia
Romanian lentila linte
Dutch lens linze
Finnish linssi linssi
Czech čočka čočka
Bulgarian леща леща

References
ISBN links support NWE through referral fees

  • Agricultural Research Service (ARS). 2008. USDA nutrient database. United States Department of Agriculture. Retrieved April 14, 2008.
  • Bender, D. A., and A. E. Bender. 2005. A Dictionary of Food and Nutrition. New York: Oxford University Press. ISBN 0198609612.
  • Davidson, A. 1999. The Oxford Companion to Food. Oxford : Oxford University Press. ISBN 0192115790.
  • Department of Plant, Soil, and Entomological Science (DPSES). 2000. Crop profile for lentils in Idaho. Department of Plant, Soil and Entomological Science, University of Idaho. Retrieved April 14, 2008.
  • Herbst, S. T. 2001. The New Food Lover's Companion: Comprehensive Definitions of Nearly 6,000 Food, Drink, and Culinary Terms. Barron's Cooking Guide. Hauppauge, NY: Barron's Educational Series. ISBN 0764112589.
  • Yadav, S. S., et al. 2007. Lentil: An Ancient Crop for Modern Times. Springer Verlag. ISBN 9781402063121.

Credits

New World Encyclopedia writers and editors rewrote and completed the Wikipedia article in accordance with New World Encyclopedia standards. This article abides by terms of the Creative Commons CC-by-sa 3.0 License (CC-by-sa), which may be used and disseminated with proper attribution. Credit is due under the terms of this license that can reference both the New World Encyclopedia contributors and the selfless volunteer contributors of the Wikimedia Foundation. To cite this article click here for a list of acceptable citing formats.The history of earlier contributions by wikipedians is accessible to researchers here:

The history of this article since it was imported to New World Encyclopedia:

Note: Some restrictions may apply to use of individual images which are separately licensed.