Ruta graveolens

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Common rue
Die Weinraute, lat. Ruta graveolens, Pflanze mit den gelben Bluten.jpg
Common rue in flower
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Sapindales
Family: Rutaceae
Genus: Ruta
Species:
R. graveolens
Binomial name
Ruta graveolens
L.
Ruta graveolens distribution.svg

Ruta graveolens, commonly known as rue, common rue or herb-of-grace, is a species of the genus Ruta grown as an ornamental plant and herb. It is native to the Balkan Peninsula. It is grown throughout the world in gardens, especially for its bluish leaves, and sometimes for its tolerance of hot and dry soil conditions. It is also cultivated as a culinary herb, and to a lesser extent as an insect repellent and incense.

Contents

Etymology

The specific epithet graveolens refers to the strong-smelling leaves. [1]

Description

Foliage Gardenology.org-IMG 2800 rbgs11jan.jpg
Foliage

Rue is a woody, perennial shrub. Its leaves are oblong, blue green and arranged pinnate; they release a strong aroma when they are bruised. [2]

The flowers are small with 4 to 5 dull yellow petals in clusters. They bear brown seed capsules when pollinated. [2]

Uses

Traditional use

In the ancient Roman world, the naturalists Pedanius Dioscorides and Pliny the Elder recommended that rue be combined with the poisonous shrub oleander to be drunk as an antidote to venomous snake bites. [3] [4]

Illustration in the Tacuinum Sanitatis Tacuin Rue35.jpg
Illustration in the Tacuinum Sanitatis

The refined oil of rue is an emmenagogue [5] and was cited by the Roman historian Pliny the Elder and Soranus as an abortifacient (inducing abortion). [6] [7]

A "crown of rue" or crancelin on the heraldic banner of Saxony

Culinary use

Capsule and seed - MHNT Ruta graveolens MHNT.BOT.2005.0.973.jpg
Capsule and seed - MHNT

Rue has a culinary use, but since it is bitter and gastric discomfort may be experienced by some individuals, it is used sparingly. Although used more extensively in former times, it is not a herb that is typically found in modern cuisine. Due to small amounts of toxins it contains, it must be used in small amounts, and should be avoided by pregnant women or women who have liver issues.

It has a variety of other culinary uses:

Other

Rue is also grown as an ornamental plant, both as a low hedge and so the leaves can be used in nosegays.

Most cats dislike the smell of it, and it can, therefore, be used as a deterrent to them (see also Plectranthus caninus ).[ citation needed ]

Caterpillars of some subspecies of the butterfly Papilio machaon feed on rue, as well as other plants. The caterpillars of Papilio xuthus also feed readily on it. [11]

In Sephardic Jewish, ruda is believed to possess protective qualities against malevolent forces, particularly the evil eye. It is often placed near vulnerable individuals, such as newborns, children, and mothers, to ward off evil. [12] Beyond its symbolic significance, ruda is valued for its medicinal properties. When combined with sugar, it is traditionally used to soothe eye discomfort and alleviate the symptoms of a mild cold. Additionally, inhaling ruda is thought to mitigate the effects of shock. Ruda's significance in Sephardic Jewish culture also extends to religious practices. During Yom Kippur, a Jewish holiday marked by fasting, Sephardic synagogues often pass ruda among congregants to revitalise them. [12]

Beyond the Sephardic tradition, Hasidic Jews also recognized the protective qualities of ruda. Hasidic Jews also were taught that rue should be placed into amulets to protect them from epidemics and plagues. [13] Other Hasidim rely on the works of a famous Baghdadi Kabbalist Yaakov Chaim Sofer who makes mention of the plant "ruda" (רודה) as an effective device against both black magic and the evil eye. [14]

It finds many household uses around the world as well. It is traditionally used in Central Asia as an insect repellent and room deodorizer.[ clarification needed ]

Toxicity

Rue is generally safe if consumed in small amounts as an herb to flavor food. Rue extracts are mutagenic and hepatotoxic. [5] Large doses can cause violent gastric pain, vomiting, liver damage, and death. [5] This is due to a variety of toxic compounds in the plant's sap. It is recommended to only use small amounts in food, and to not consume it excessively. It should be strictly avoided by pregnant women, as it can be an abortifacient and teratogen.[ citation needed ]

Exposure to common rue, or herbal preparations derived from it, can cause severe phytophotodermatitis, which results in burn-like blisters on the skin. [15] [16] [17] [18] The mechanism of action is currently unknown. [19]

Effect of the common rue on skin in sunny weather Effet de la rue officinale.jpg
Effect of the common rue on skin in sunny weather

Chemistry

R. graveolens essential oil in a clear glass vial RutaGraveolensEssentialOil.png
R. graveolens essential oil in a clear glass vial

A series of furanoacridones and two acridone alkaloids (arborinine and evoxanthine) have been isolated from R. graveolens. [20] It also contains coumarins and limonoids. [21]

Cell cultures produce the coumarins umbelliferone, scopoletin, psoralen, xanthotoxin, isopimpinellin, rutamarin and rutacultin, and the alkaloids skimmianine, kokusaginine, 6-methoxydictamnine and edulinine. [22]

The ethyl acetate extract of R. graveolens leaves yields two furanocoumarins, one quinoline alkaloid and four quinolone alkaloids including graveoline. [23] [24]

The chloroform extracts of the root, stem and leaf shows the isolation of the furanocoumarin chalepensin. [25]

The essential oil of R. graveolens contains two main constituents, undecan-2-one (46.8%) and nonan-2-one (18.8%). [26]

Symbolism

The bitter taste of its leaves led to rue being associated with the (etymologically unrelated) verb rue "to regret". Rue is well known for its symbolic meaning of regret and it has sometimes been called "herb-of-grace" in literary works. In mythology, [27] the basilisk, whose breath could cause plants to wilt and stones to crack, had no effect on rue. Weasels who were bitten by the basilisk would retreat and eat rue in order to recover and return to fight.

In the Bible

Rue is mentioned in the New Testament, Luke 11:42:

"But woe unto you, Pharisees! For ye tithe mint and rue and all manner of herbs".

In Jewish culture

Sephardic Jewish tradition has long valued ruda for its diverse applications in health, religious practices, and spiritual well-being. It was in the Ottoman Balkans, rather than Medieval Spain, that Sephardic Jews encountered ruda and adopted its associated traditions and beliefs. [12]

For Sephardic Jews, Ruda is believed to protect against the evil eye and is often placed near newborns, children, and mothers to ward off harm. It is also traditionally used for its healing properties; when combined with sugar, it can soothe eye discomfort. Inhaling ruda is thought to alleviate symptoms of shock. [12] During Yom Kippur, ruda is sometimes used in synagogues to revitalize fasting worshippers. [12]

In Sephardic culture, ruda also symbolizes affection and is incorporated into celebratory rituals such as bridal showers. This symbolism is also featured in the traditional Sephardic song "Una Matica de Ruda", a popular Ladino ballad sung by Sephardic Jews for centuries. It's a retelling of a 16th-century Spanish ballad, and depicts a conversation between a mother and daughter about love and marriage. The daughter receives a cluster of ruda from a suitor, while the mother warns her of the dangers of new love. [12]

In Lithuania

Rue is considered a national herb of Lithuania and it is the most frequently referenced herb in Lithuanian folk songs, as an attribute of young girls, associated with virginity and maidenhood. It was common in traditional Lithuanian weddings for only virgins to wear a rue (Lithuanian : rūta) at their wedding, a symbol to show their purity.

In Ukraine

Likewise, rue is prominent in Ukrainian folklore, songs and culture. In the Ukrainian folk song "Oi poli ruta, ruta" (O, rue, rue in the field), the girl regrets losing her virginity, reproaching the lover for "breaking the green hazel tree". [28] "Chervona Ruta" (Червона Рута—"Red Rue") is a song, written by Volodymyr Ivasyuk, a popular Ukrainian poet and composer. Pop singer Sofia Rotaru performed the song in 1971.

In Shakespeare

It is one of the flowers distributed by the mad Ophelia in William Shakespeare's Hamlet (IV.5):

"There's fennel for you, and columbines:
there's rue for you; and here's some for me:
we may call it herb-grace o' Sundays:
O you must wear your rue with a difference..."

It is used by the clown Lavatch in All's Well That Ends Well (IV.5) to describe Helena and his regret at her apparent death:

"she was the sweet marjoram of the salad, or rather, the herb of grace."

It was planted by the gardener in Richard II to mark the spot where the Queen wept upon hearing news of Richard's capture (III.4.104–105):

"Here did she fall a tear, here in this place
I'll set a bank of rue, sour herb of grace."

It is also given by the rusticated Perdita to her disguised royal father-in-law on the occasion of a sheep-shearing ( Winter's Tale , IV.4):

"For you there's rosemary and rue; these keep
Seeming and savour all the winter long."

In other English literature

It is used by Michael in Milton's Paradise Lost to give Adam clear sight (11.414):

"Then purg'd with euphrasy and rue
The visual nerve, for he had much to see."

Rue is used by Gulliver in Gulliver's Travels (by Jonathan Swift) when he returns to England after living among the "Houyhnhnms". Gulliver can no longer stand the smell of the English Yahoos (people), so he stuffs rue or tobacco in his nose to block out the smell.

"I was at last bold enough to walk the street in his (Don Pedro's) company, but kept my nose well with rue, or sometimes with tobacco".

See also

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References

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  19. Naghibi Harat, Z.; Kamalinejad, M.; Sadeghi, M. R.; Sadeghipour, H. R.; Eshraghian, M. R. (2009-05-10). "A Review on Ruta graveolens L. Its Usage in Traditional Medicine and Modern Research Data". Journal of Medicinal Plants. 8 (30): 1–19.
  20. Rethy, Borbala; Zupko, Istvan; Minorics, Renata; Hohmann, Judit; Ocsovszki, Imre; Falkay, George (2007). "Investigation of cytotoxic activity on human cancer cell lines of arborinine and furanoacridones isolated from Ruta graveolens". Planta Medica. 73 (1): 41–48. doi:10.1055/s-2006-951747. PMID   17109253. S2CID   260283678. INIST   18469419
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