Solanum nigrum

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Solanum nigrum
Solanum nigrum flower.jpg
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Solanales
Family: Solanaceae
Genus: Solanum
Species:
S. nigrum
Binomial name
Solanum nigrum
L.
Subspecies

S. nigrum subsp. nigrum
S. nigrum subsp. schultesii
S. nigrum subsp. vulgare

Contents

Ripe berries of S. nigrum Solanum nigrum berries.jpg
Ripe berries of S. nigrum

Solanum nigrum, the European black nightshade or simply black nightshade or blackberry nightshade, [1] is a species of flowering plant in the family Solanaceae, native to Eurasia and introduced in the Americas, Australasia, and South Africa. Ripe berries and cooked leaves of edible strains are used as food in some locales, and plant parts are used as a traditional medicine. Some other species may also be referred to as "black nightshade". [2]

Solanum nigrum has been recorded from deposits of the Paleolithic and Mesolithic era of ancient Britain and it is suggested by the botanist and ecologist Edward Salisbury that it was part of the native flora there before Neolithic agriculture emerged. [3] The species was mentioned by Pliny the Elder in the first century AD and by the great herbalists, including Dioscorides. [4] In 1753, Carl Linnaeus described six varieties of Solanum nigrum in Species Plantarum . [5]

Description

Black nightshade flowers Black Nightshade - Flickr - treegrow (2).jpg
Black nightshade flowers
Habit Solanum nigrum habit.jpg
Habit

Black nightshade is a common herb or short-lived perennial shrub, found in many wooded areas, as well as disturbed habitats. It reaches a height of 30 to 120 cm (12 to 47 in), leaves 4.0 to 7.5 cm (1.6 to 3.0 in) long and 2 to 5 cm (1 to 2 in) wide; ovate to heart-shaped, with wavy or large-toothed edges; both surfaces hairy or hairless; petiole 1 to 3 cm (0.5 to 1 in) long with a winged upper portion. The flowers have petals greenish to whitish, recurved when aged and surround prominent bright yellow anthers. The berry is mostly 6 to 8 mm (0.24 to 0.31 in) in diam., dull black or purple-black. [6] In India, another strain is found with berries that turn red when ripe. [7]

Sometimes S. nigrum is confused for the more toxic deadly nightshade ( Atropa belladonna ), which is in a different genus within Solanaceae. A comparison of the fruit shows that the black nightshade berries grow in bunches, whereas the deadly nightshade berries grow individually. Another distinction is black nightshade flowers have white petals.

Growth habit

The suited soil pH value of black nightshade is between 5.5 and 6.5. It is rich in organic matter, water and fertility on the strong soil growth, in the lack of organic matter, poor ventilation clay, its roots will be stunted, plant growth is weak, commodity is poor. It is difficult to grow under the condition of high temperature and high humidity, the plant grows slowly, the tender shoot is easy to aging fiber, and the commodity is poor. [8]

Taxonomy

Solanum nigrum is a highly variable species with many varieties and forms described. [9] The recognized subspecies are: [4]

1. S. nigrum L. subsp. nigrum — glabrous to slightly hairy with appressed non-glandular hairs
2. S. nigrum L. subsp. schultesii (Opiz) Wessley — densely hairy with patent, glandular hairs
3. S. nigrum L. subsp. vulgare — found in cooler regions. has a more spreading habit and its leaves might be more wrinkled compared to the typical subspecies.

The Solanum nigrum complex — also known as Solanum L. section Solanum — is the group of black nightshade species characterized by their lack of prickles and stellate hairs, their white flowers, and their green or black fruits arranged in an umbelliform fashion. [9] The Solanum species in this group can be taxonomically confused, more so by intermediate forms and hybridization between the species. [4] Some of the major species within the S. nigrum complex are: S. nigrum, S. americanum , S. douglasii , S. opacum , S. ptychanthum , S. retroflexum , S. sarrachoides , S. scabrum , and S. villosum .

Toxicity

Leaves, flowers and fruit of S. nigrum Solanum nigrum leafs flowers fruits.jpg
Leaves, flowers and fruit of S. nigrum

Solanine levels in S. nigrum have been tested, and the plant is rarely fatal. [10]

Solanine poisoning symptoms may occur when immature green fruit (looks similar to green peas) or mature leaves are ingested raw. They are typically delayed for 6 to 12 hours after ingestion. [11] Initial symptoms of toxicity include fever, sweating, vomiting, abdominal pain, diarrhea, confusion, and drowsiness. [12] Death from ingesting large amounts of the plant results from cardiac arrhythmias and respiratory failure. [12] Livestock have also been poisoned from nitrate toxicity by grazing the mature leaves and green berries of S. nigrum. [4] However, in central Spain, the great bustard ( Otis tarda ) may act as a seed disperser of European black nightshade (Solanum nigrum). [13] Black nightshade is highly variable, and some advise to avoid eating the berries unless they are a known edible strain. [14] The toxin levels may also be affected by the plant's growing conditions. [4] The toxins in S. nigrum are most concentrated in the unripe green berries, and immature fruit should be treated as toxic. [11] [12] [15] Most cases of suspected poisoning are due to consumption of leaves or unripe fruit. There are ethnobotanical accounts of S. nigrum young leaves and shoots being boiled as a vegetable with the cooking water being discarded and replaced several times to remove toxins. [4] Solanine is water-soluble and is destroyed by boiling. [12] S. nigrum leaves may be different from this perspective. Young cooked leaves of Solanum complex sp. are a source many useful nutrients similar to levels found in spinach. [16] Solanum complex berries have been consumed on every continent since ancient times.

Uses

Ripe berries of the "Red Makoi" variety of S. nigrum are edible Makoi or Solanum nigrum berries.jpg
Ripe berries of the "Red Makoi" variety of S. nigrum are edible

Some of the uses ascribed to S. nigrum in literature may actually apply to other black nightshade species within the same species complex, and proper species identification is essential for food and medicinal uses (See Taxonomy section). [2] [9]

Culinary usage

S. nigrum has been widely used as a food since early times, and the fruit was recorded as a famine food in 15th-century China. [17] Despite toxicity issues with some forms, the ripe berries and boiled leaves of edible strains are eaten. The thoroughly boiled leaves — although strong and slightly bitter flavours — are used like spinach as horta and in fataya pies and quiches. The ripe black berries are described as sweet and salty, with hints of liquorice and melon. [18]

In Kenya, among the Abagusii, S. nigrum (rinagu - singular; amanagu - plural) is a vegetable delicacy which when blanched and sauteed or boiled to soften and then salted or sauteed and eaten with Ugali (a corn meal product). In the rest of Kenya, S. nigrum(managu) is eaten in a similar way.

In Tanzania, S. nigrum (mnafu or mnamvu in Kiswahili) is a popular green vegetable. Sautéed with chicken or pork, eaten with Ugali, it is an expensive meal in most restaurants in urban areas. Traditionally, the Iraqw people in northern Tanzania have used S. nigrum (manakw) as vegetable for generations, eaten with special ‘ugali’ (xwante), stiff porridge made with corn, millet or sorghum flour. An ethnobotanical survey conducted in the mid 1990s on the islands of Zanzibar and Pemba indicated that S. nigrum was referred to as vwevwe in Kiswahili. [19]

In India, the berries are casually grown and eaten, but not cultivated for commercial use. In South India, the leaves and berries are routinely consumed as food after cooking with tamarind, onion, and cumin seeds. [20] The berries are referred to as "fragrant tomato". Although not very popular across much of its growing region, the fruit and dish are common in Tamil Nadu (மணத்தக்காளி in Tamil), Kerala, southern Andhra Pradesh, and southern Karnataka. They are used not only fresh but also dried.

In Ethiopia, the ripe berries are picked and eaten by children. During famines, all affected people would eat berries. In addition, the leaves are collected by women and children, who cook the leaves in salty water and consume them like any other vegetable. Farmers in the Konso Special Woreda report that because S. nigrum matures before the maize is ready for harvesting, it is used as a food source until their crops are ready. [21] The Welayta people in the nearby Wolayita Zone do not weed out S. nigrum that appears in their gardens since they likewise cook and eat the leaves. [22]

In Ghana, they are called kwaansusuaa, and are used in preparing various soups and stews, including the popular palm nut soup commonly eaten with banku or fufu . [23]

Ripe and unripe S nigrum berries on the same stalk Solanum Nigrum Berries.jpg
Ripe and unripe S nigrum berries on the same stalk

In South Africa, the very ripe and hand-selected fruit (nastergal in Afrikaans and umsobo in Zulu) is cooked into a runny purple jam. [24] However, the fruit used in South Africa is more likely to be Solanum retroflexum. [25]

In Greece and Turkey, the leaves are called istifno, and in Crete known as stifno. They are one of the ingredients included in the salad of boiled greens known as horta. [26]

In Indonesia, the young fruits and leaves of cultivated forms are used and are known as ranti (Javanese) or leunca (Sundanese). The fruit and leaves are eaten raw as part of a traditional salad lalapan, or the fruit is cooked (fried) with oncom . [27]

It was imported into Australia from Mauritius in the 1850s as a vegetable during the gold rush, [18] but S. nigrum is now prohibited for trade as a food by the Australia New Zealand Food Standards Code. [28]

During ancient times in Hawaii young shoots, leaves, small white flowers, and small black berries were eaten. [29] The leaves, among other greens, were cooked by rolling hot stones among them in a covered gourd. [30]

Medicinal usage

The plant has a long history of medicinal usage, dating back to ancient Greece. "... In the fourteenth century, we hear of the plant under the name of Petty Morel being used for canker and with Horehound and wine taken for dropsy." [31] It was a traditional European medicine used as a strong sudorific, analgesic and sedative with powerful narcotic properties, but was considered a "somewhat dangerous remedy". [31] [32] Internal use has fallen out of favor in Western herbalism due to its variable chemistry and toxicity, but it is used topically as a treatment for herpes zoster. [33] [34] [35] [36] There is much disagreement as to whether the leaves and fruit of S. nigrum are poisonous. But many countries grow this plant as a food crop. The toxicity of S. nigrum may vary by the region and species where it grows. [37] Native Hawaiians use the berries' juice as a laxative, they also take the young leaves boiled to relieve sore throats and coughs. [38]

S. nigrum is an important ingredient in traditional Indian medicines. Infusions are used in dysentery, stomach complaints, and fever. [39] The juice of the plant is used on ulcers and other skin diseases. [39] The fruits are used as a tonic, laxative, appetite stimulant, and for treating asthma and "excessive thirst". [39] Traditionally the plant was used to treat tuberculosis.[ citation needed ] This plant's leaves are used to treat mouth ulcers that happen during winter periods of Tamil Nadu, India. In North India, the boiled extracts of leaves and berries are also used to alleviate liver-related ailments, including jaundice. The juice from its roots is used against asthma and whooping cough. [40]

S. nigrum is a widely used plant in oriental medicine where it is considered to be antitumorigenic, antioxidant, anti-inflammatory, hepatoprotective, diuretic, and antipyretic. [41] [42]

Some experiments indicate that the plant inhibits growth of cervical carcinoma in mice. [43] The active ingredient of the plant, solanine, inhibits the proliferation of different cancer cells in vitro, such as breast cancer and pancreatic cancer. Its anti-tumor mechanism is mainly through the induction of different cell and molecular pathways, leading to apoptosis and autophagy of cells and molecules, and inhibiting tumor metastasis. [44] [45] Water extracts of Solanum nigrum have shown a citotoxic activity in reducing ROS generation of the human MM cell line A-375. [46]

Solanum nigrum is known to contain solasodine (a steroidal glycoalkaloid that can be used to make 16-DPA progenitor); a possible commercial source could be via cultivating the hairy roots of this plant. [47] [48]

It is also a treatment of gastric ulcer. Through experiments on mice gastric ulcer model and control group, the results showed that the extract of black nightshade powder and methanol could significantly affect the secretion of gastric acid and protease in mice, thus significantly reducing the gastric ulcer index of mice. [49] Solanum nigrum, [46] Tasmannia pepper leaf, anise myrtle and lemon myrtle share a high concentration of polyphenols and polysaccharides, which take a role in inhibition of iNOS and COX-2 activities, resulting "a viable approach to inhibit inflammation and carcinogenesis and to prevent cancer." [50]

Uttroside B, a saponin, was identified as a bioactive chemotherapeutic agent, against hepatocellular carcinoma, obtained from the methanolic extract of S. nigrum. [51] Lankalapalli et al. isolated uttroside B and provided its structure elucidation by derivatization, which afforded an enol ether, and characterized by detailed 2D NMR analysis in this publication. [52] Uttroside B and uttroside A can be differentiated by the group present in C-22 with hydroxyl and methoxy groups, respectively. The structural resemblance of uttroside B and uttroside A poses a challenge in differentiation of these two molecules by NMR or other techniques. Recently, this group provided a correction of a NMR figure with respect to the structure of uttroside B, which enable differentiation of uttroside B from uttroside A with characteristic chemical shift difference in 13C NMR of hemiketal carbon C-22 at 110.5 and 112.5 ppm, respectively. [53] US-FDA granted an orphan drug designation for uttroside B against hepatocellular carcinoma.

Cultivation

Black nightshade is cultivated as a food crop on several continents, including Africa and North America. The leaves of cultivated strains are eaten after cooking. [18] A garden form with fruit about 1.27 cm (0.50 in) diam. is occasionally cultivated. [54]

Weed

Black nightshade can be a serious agricultural weed when it competes with crops. [55] [56] It has been reported as a weed in 61 countries and 37 crops. Herbicides are used extensively to control it in field crops such as cotton.

Related Research Articles

<span class="mw-page-title-main">Eggplant</span> Plant species, Solanum melongena

Eggplant, aubergine, brinjal, or baigan (GY) is a plant species in the nightshade family Solanaceae. Solanum melongena is grown worldwide for its edible fruit.

<i>Solanum</i> Genus of flowering plants

Solanum is a large and diverse genus of flowering plants, which include three food crops of high economic importance: the potato, the tomato and the eggplant. It is the largest genus in the nightshade family Solanaceae, comprising around 1,500 species. It also contains the so-called horse nettles, as well as numerous plants cultivated for their ornamental flowers and fruit.

<span class="mw-page-title-main">Blackcurrant</span> Species of flowering plant in the gooseberry family Grossulariaceae

The blackcurrant, also known as black currant or cassis, is a deciduous shrub in the family Grossulariaceae grown for its edible berries. It is native to temperate parts of central and northern Europe and northern Asia, where it prefers damp fertile soils. It is widely cultivated both commercially and domestically.

<i>Solanum dulcamara</i> Species of plant

Solanum dulcamara is a species of vine in the genus Solanum of the family Solanaceae. Common names include bittersweet, bittersweet nightshade, bitter nightshade, blue bindweed, Amara Dulcis, climbing nightshade, felonwort, fellenwort, felonwood, poisonberry, poisonflower, scarlet berry, snakeberry, trailing bittersweet, trailing nightshade, violet bloom, and woody nightshade.

<span class="mw-page-title-main">Solanine</span> Glycoalkaloid poison found in the nightshade family of plants

Solanine is a glycoalkaloid poison found in species of the nightshade family within the genus Solanum, such as the potato, the tomato, and the eggplant. It can occur naturally in any part of the plant, including the leaves, fruit, and tubers. Solanine has pesticidal properties, and it is one of the plant's natural defenses. Solanine was first isolated in 1820 from the berries of the European black nightshade, after which it was named. It belongs to the chemical family of saponins.

<i>Physalis peruviana</i> Species of cultivated South American fruit

Physalis peruviana is a species of plant in the nightshade family (Solanaceae) native to Chile and Peru. Within that region, it is called aguaymanto, uvilla or uchuva, in addition to numerous indigenous and regional names. In English, its common names include Cape gooseberry, goldenberry and Peruvian groundcherry.

<i>Gnetum gnemon</i> Species of plant

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<span class="mw-page-title-main">Leaf vegetable</span> Plant leaves eaten as a vegetable

Leaf vegetables, also called leafy greens, pot herbs, vegetable greens, or simply greens, are plant leaves eaten as a vegetable, sometimes accompanied by tender petioles and shoots. Leaf vegetables eaten raw in a salad can be called salad greens.

<i>Solanum aculeastrum</i> Species of plant

Solanum aculeastrum is commonly known as soda apple, sodaapple nightshade, goat apple, poison apple, or more ambiguously as "bitter-apple". It is a poisonous nightshade species from Africa and not related to true apples. The term "soda apple" probably derives from "Sodom apple", modified due to the fruit's detergent properties.

<i>Solanum aethiopicum</i> Fruiting plant

Solanum aethiopicum, the bitter tomato, Ethiopian eggplant, or nakati, is a fruiting plant of the genus Solanum mainly found in Asia and Tropical Africa. It is also known as Ethiopian nightshade, garden eggs, pumpkin-on-a-stick, and mock tomato. It is a popular vegetable in north-east India, and is known as khamen akhaba in Manipuri and samṭawk in Mizo. They are called Titay bii or simply bii in Darjeeling, Sikkim and Nepal and are relished with meat, particularly pork. These names are a result of its varied morphology, with ripe fruit often looking like a cross between an eggplant and a tomato, which are also from Solanum. In fact, the Ethiopian eggplant was so much confused with the ordinary eggplant that this was considered by some a variety violaceum of S. aethiopicum.

<i>Solanum americanum</i> Species of flowering plant in the nightshade family Solanaceae

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<i>Solanum mammosum</i> Species of plant

Solanum mammosum, commonly known as nipplefruit, fox head, cow's udder, or apple of Sodom, is an inedible Pan-American tropical fruit. The plant is grown for ornamental purposes, in part because of the distal end of the fruit's resemblance to a human breast, while the proximal end looks like a cow's udder. It is an annual in the family Solanaceae, and part of the genus Solanum, making the plant a relative of the eggplant, tomato, and potato. This poisonous fruit is native to South America, but has been naturalized in Southern Mexico, Greater Antilles, Central America, and the Caribbean. The plant adapts well to most soils, but thrives in moist, loamy soil.

<i>Solanum torvum</i> Species of flowering plant

Solanum torvum, also known as pendejera, turkey berry, devil's fig, pea eggplant, platebrush or susumber, is a bushy, erect and spiny perennial plant used horticulturally as a rootstock for eggplant. Grafted plants are very vigorous and tolerate diseases affecting the root system, thus allowing the crop to continue for a second year.

<span class="mw-page-title-main">Tomato</span> Edible berry of the tomato plant, Solanum lycopersicum

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<i>Solanum jamesii</i> Species of plant

Solanum jamesii is a species of nightshade. Its range includes the southern United States. All parts of the plant, and especially the fruit, are toxic, containing solanine when it matures. The tubers were/are eaten raw or cooked by several Native American tribes, but they require leaching and boiling in clay in order to be rendered edible. The tubers are small when compared to familiar varieties of S. tuberosum.

<span class="mw-page-title-main">Tomatine</span> Chemical compound

Tomatine is a glycoalkaloid, found in the stems and leaves of tomato plants, and in the fruits at much lower concentrations. Chemically pure tomatine is a white crystalline solid at standard temperature and pressure.

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Solanum opacum is a species of flowering plant in the family Solanaceae. It is referred to by the common names green berry nightshade, or morelle verte and is a sprawling annual native to eastern Australia. It is part of the black nightshade group of Solanum species.

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Solanum scabrum, also known as garden huckleberry, is an annual or perennial plant in the nightshade family. The geographic origin of the species is uncertain; Linnaeus attributed it to Africa, but it also occurs in North America, and it is naturalized in many countries. In Africa it is cultivated as a leaf vegetable and for dye from the berries.

<span class="mw-page-title-main">African nightshade</span> Name for several species of flowering plant

African nightshades are several species of plants in the section Solanum of the genus Solanum, that are commonly consumed as leafy vegetables and herbs. African nightshades are grown in both high and lowland areas in West and East Africa, particularly in Nigeria and Cameroon.The Nso people call it Nyuuseji, and the Kom people call it Mbasi. There is a large variation in diversity of the African nightshades, which have many nutritional and medicinal benefits, even though the family of nightshade is commonly known as comprising dangerous weeds or poisonous plants. Species known as African nightshade include Solanum scabrum, Solanum villosum, Solanum nigrum, and Solanum americanum. Other common names for African nightshade are Black nightshade and Narrow-leaved nightshade. Local names of African nightshade include managu (Kikuyu), mnavu (Swahili), rinagu (Kisii), namasaka (Luhya), osuga (Luo), isoiyot (Kipsigis), kitulu (Kamba), ormomoi (Maa), ndunda (Taita), nsugga (Luganda), sochot (Keiyo), and esisogho (Lukhonzo).

<span class="mw-page-title-main">Solanaceae</span> Family of flowering plants that includes tomatoes, potatoes and tobacco

The Solanaceae, or the nightshades, are a family of flowering plants that ranges from annual and perennial herbs to vines, lianas, epiphytes, shrubs, and trees, and includes a number of agricultural crops, medicinal plants, spices, weeds, and ornamentals. Many members of the family contain potent alkaloids, and some are highly toxic, but many—including tomatoes, potatoes, eggplant, bell and chili peppers—are used as food. The family belongs to the order Solanales, in the asterid group and class Magnoliopsida (dicotyledons). The Solanaceae consists of about 98 genera and some 2,700 species, with a great diversity of habitats, morphology and ecology.

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