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Basil (Ocimum basilicum) ( or ), of the Family Lamiaceae (mints), is a tender low-growing herb.Basil is a culinary herb prominently featured in Italian cuisine, and also plays a major role in the Southeast Asian cuisines of Thailand, Vietnam, Cambodia, and Laos. The plant tastes somewhat like anise, with a strong, pungent, sweet smell.

There are many varieties of basil. That which is used in Italian food is typically called sweet basil, as opposed to Thai basil, lemon basil and holy basil, which are used in Asia. While most common varieties of basil are treated as annuals, some are perennial in warm, tropical climates, including African Blue and Holy Thai basil.

Basil is originally native to Iranmarker, Indiamarker and other tropical regions of Asia, having been cultivated there for more than 5,000 years.

Etymology

The word basil comes from the Greek βασιλεύς (basileus), meaning "king", as it is believed to have grown above the spot where St. Constantine and Helen discovered the Holy Cross. The Oxford English Dictionary quotes speculations that basil may have been used in "some royal unguent, bath, or medicine". Basil is still considered the "king of herbs" by many cookery authors.

Nomenclature and taxonomy

The genetic family and different species name are detailed here.

Culinary use

Dried basil leaves.
Basil is commonly used fresh in cooked recipes. It is generally added at the last moment, as cooking quickly destroys the flavour. The fresh herb can be kept for a short time in plastic bags in the refrigerator, or for a longer period in the freezer, after being blanched quickly in boiling water. The dried herb also loses most of its flavour, and what little flavour remains tastes very different, with a weak coumarin flavour, like hay.

Basil is one of the main ingredients in pesto—a green Italian oil-and-herb sauce. Its other two main ingredients are olive oil and pine nuts.

The most commonly used Mediterranean basil cultivars are "Genovese", "Purple Ruffles", "Mammoth", "Cinnamon", "Lemon", "Globe", and "African Blue". The Chinese also use fresh or dried basils in soups and other foods. In Taiwanmarker, people add fresh basil leaves to thick soups ( ). They also eat fried chicken with deep-fried basil leaves. Basil (most commonly Thai Basil) is commonly steeped in cream or milk to create an interesting flavor in ice cream or chocolates (such as truffles).

Basil is sometimes used with fresh fruit and in fruit jams and sauces—in particular with strawberries, but also raspberries or dark-colored plums. Arguably the flat-leaf basil used in Vietnamese cooking, which has a slightly different flavour, is more suitable for use with fruit.

Basil seeds

When soaked in water the seeds of several basil varieties become gelatinous, and are used in Asian drinks and desserts such as falooda or Sherbet. Such seeds are known variously as sabza, subza, takmaria, tukmaria, tukhamaria, falooda, selasih (Malay/Indonesian) or hột é (Vietnamese). They are used for their medicinal properties in Ayurveda, the traditional medicinal system of Indiamarker and Siddha medicine, a traditional Tamil system of medicine. They are also used as popular drinks in Southeast Asia.

Other basils

See List of basil cultivars
Several other basils, including some other Ocimum species, are grown in many regions of Asia. Most of the Asian basils have a clove-like flavour that is generally stronger than the Mediterranean basils. The most notable is the holy basil or tulsi, a revered home-grown plant in Indiamarker and Nepalmarker. In Chinamarker, the local cultivar is called ( ), while the imported varieties are specifically called ( ) or ( ), although [巴西里] often refers to another different kind plant—parsley.

Lemon basil has a strong lemony smell and flavour very different from those of other varieties because it contains a chemical called citral. It is widely used in Indonesia, where it is called kemangi and served raw, together with raw cabbage, green beans, and cucumber, as an accompaniment to fried fish or duck. Its flowers, broken up, are a zesty salad condiment.

Chemical components

The various basils have such different scents because the herb has a number of different essential oils which come together in different proportions for various breeds. The strong clove scent of sweet basil is derived from eugenol, the same chemical as actual cloves . The citrus scent of lemon basil and lime basil is because they have a higher portion of citral which causes this effect in several plants, including lemon mint, and limonene, which gives actual lemon peel its scent. African blue basil has a strong camphor smell because it has camphor and camphene in higher proportions. Licorice Basil contains anethole, the same chemical that makes anise smell like licorice, and in fact is sometimes called Anise Basil.

Other chemicals helping produce the distinctive scents of many basils, depending on their proportion in each specific breed, including :



Basil and oregano contain large amounts of (E)-beta-caryophyllene (BCP), which might have a use in treating inflammatory bowel diseases and arthritis. BCP is the only product identified in nature that activates CB2 selectively; it interacts with one of two cannabinoid receptors (CB2), blocking chemical signals that lead to inflammation, without triggering cannabis's mood-altering effects.

Cultivation

Basil growing in the sun
Basil sprout at an early stage


Basil grows to between tall, with opposite, light green, silky leaves long and broad. The flowers are small, white in color and arranged in a terminal spike. Unusual among Lamiaceae, the four stamens and the pistil are not pushed under the upper lip of the corolla, but lay over the inferior. After entomophilous pollination, the corolla falls off and four round achenes develop inside the bilabiate calyx.

Basil is very sensitive to cold, with best growth in hot, dry conditions. It behaves as an annual if there is any chance of a frost. In Northern Europe, Canada, the northern states of the U.S., and the South Island of New Zealand it will grow best if sown under glass in a peat pot, then planted out in late spring/early summer (when there is little chance of a frost). It fares best in a well-drained sunny spot.

Although basil will grow best outdoors, it can be grown indoors in a pot and, like most herbs, will do best on an equator-facing windowsill. It should be kept away from extremely cold drafts, and grows best in strong sunlight, therefore a greenhouse or Row cover is ideal if available. They can, however, be grown even in a basement, under fluorescent lights.

If its leaves have wilted from lack of water, it will recover if watered thoroughly and placed in a sunny location. Yellow leaves towards the bottom of the plant are an indication that the plant needs more sunlight or less fertilizer.

In sunnier climates such as Southern Europe, the southern states of the U.S., the North Island of New Zealand, and Australia, basil will thrive when planted outside. It also thrives over the summertime in the central and northern United States, but dies out when temperatures reach freezing point. It will grow back the next year if allowed to go to seed. It will need regular watering, but not as much attention as is needed in other climates.

Basil can also be propagated very reliably from cuttings in exactly the same manner as Busy Lizzie (Impatiens), with the stems of short cuttings suspended for two weeks or so in water until roots develop.

If a stem successfully produces mature flowers, leaf production slows or stops on any stem which flowers, the stem becomes woody, and essential oil production declines.To prevent this, a basil-grower may pinch off any flower stems before they are fully mature. Because only the blooming stem is so affected, some can be pinched for leaf production, while others are left to bloom for decoration or seeds.

Once the plant is allowed to flower, it may produce seed pods containing small black seeds which can be saved and planted the following year. Picking the leaves off the plant helps "promote growth", largely because the plant responds by converting pairs of leaflets next to the topmost leaves into new stems.

Diseases

Basil suffers from several plant pathogens that can ruin the crop and reduce yield. Fusarium wilt is a soil-borne fungal disease that will quickly kill younger basil plants. Seedlings may also be killed by Pythium damping off.

A common foliar disease of basil is gray mold caused by Botrytis cinerea, can also cause infections post-harvest and is capable of killing the entire plant. Black spot can also be seen on basil foliage and is caused by the fungi genus Colletotrichum.

Health effects

Recently, there has been much research into the health benefits conferred by the essential oils found in basil. Scientific studies have established that compounds in basil oil have potent antioxidant, anti-cancer, anti-viral, and anti-microbial properties. In addition, basil has been shown to decrease the occurrence of platelet aggregation and experimental thrombus in mice. It is traditionally used for supplementary treatment of stress, asthma and diabetes in India. In Siddha medicine, it is used for treating pimples on the face, but noted that intake of the seeds in large quantities is harmful for the brain .

Basil, like other aromatic plants such as fennel and tarragon, contains estragole, a known carcinogen and teratogen in rats and mice. While human effects are currently unstudied, the rodent experiments indicate that it would take 100–1000 times the normal anticipated exposure to become a cancer risk.

Cultural aspects

There are many rituals and beliefs associated with basil. The French sometimes call basil "l'herbe royale". Jewish folklore suggests it adds strength while fasting. It is a symbol of love in present-day Italymarker, but represented hatred in ancient Greecemarker, and European lore sometimes claims that basil is a symbol of Satan. African legend claims that basil protects against scorpions, while the English botanist Culpeper cites one "Hilarius, a French physician" as affirming it as common knowledge that smelling basil too much would breed scorpions in the brain.

Holy Basil, also called 'Tulsi' , is highly revered in Hinduism and also has religious significance in the Greek Orthodox Church, where it is used to prepare holy water. It is said to have been found around Christ's tomb after his resurrection. The Bulgarian Orthodox Church, Serbian Orthodox Church, Macedonian Orthodox Church and Romanian Orthodox Church use basil (Bulgarian and Macedonian: босилек; Romanian: busuioc, Serbian: босиљак) to prepare holy water and pots of basil are often placed below church altars.

In Europe, basil is placed in the hands of the dead to ensure a safe journey. In India, they place it in the mouth of the dying to ensure they reach God. The ancient Egyptians and ancient Greeks believed that it would open the gates of heaven for a person passing on.

In Boccaccio's Decameron a memorably morbid tale (novella V) tells of Lisabetta, whose brothers slay her lover. He appears to her in a dream and shows her where he is buried. She secretly disinters the head, and sets it in a pot of basil, which she waters with her daily tears. The pot being taken from her by her brothers, she dies of her grief not long after. Boccaccio's tale is the source of John Keats' poem Isabella or The Pot of Basil - which in turn inspired the paintings Isabella and Isabella and the Pot of Basil. A similar story is told of the Longobard queen Rosalind.

Toxicity studies

Gallery

Image:Basil Flower2.jpgImage:Basil leaves.jpg|Fresh basil leavesImage:Basilseeds.jpg|Basil seedsImage:Basil-Basilico-Ocimum basilicum-albahaca.jpg|Basil plantImage:Basil seed drink.jpg|A can of basil seed drinkImage:ChristianBauer stalk of basil.jpg|Flowering basil stalkFile:Basil3800ppx.jpg|Basil leaves.

See also



References

Footnotes

  1. , "Basil: A Source of Aroma Compounds and a Popular Culinary and Ornamental Herb", reprinted from: Perspectives on new crops and new uses (1999), ASHS Press, Alexandria, VA, ISBN 978-0-9615027-0-6.
  2. Anti-inflammatory compound from cannabis found in herbs


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