Мирабилис жалапа: Ғажайып гүлдің сипаттамасы

Species of flower

Mirabilis jalapa, the marvel of Peru or four o'clock flower, is the most commonly grown ornamental species of Mirabilis plant, and is available in a range of colors. Mirabilis in Latin means wonderful and Jalapa (or Xalapa) is the state capital of Veracruz in México. Mirabilis jalapa was cultivated by the Aztecs for medicinal and ornamental purposes. The flowers usually open from late afternoon or at dusk (namely between 4 and 8 o'clock), giving rise to one of its common names. Flowers then produce a strong, sweet smelling fragrance throughout the night, then close in the morning. New flowers open the following day. It arrived in Europe in 1525. Today, it is common in many tropical regions and is also valued in Europe as a (not hardy) ornamental plant. It is the children's state flower of Connecticut under the name of Michaela Petit's Four O'Clocks.

The name of Mirabilis jalapa given by Carl Von Linné in 1753 is formed from the scientific Latin Mirabilis meaning "admirable" by allusion to the remarkable colors of its flowers and the specific name jalapa that would refer to its origin in the Jalapa in Guatemala. But the epithet of jalapa could also refer to the city of Xalapa (Jalapa) in Mexico from which came a former purgative drug, named jalap, taken from the tubers of the tuberous jalap. Linnaeus refers to all species of Jalapa described by Joseph Pitton de Tournefort who in 1694 wrote: "The Jalap, or Belle de Nuit is a kind of plant whose flower is a funnel shaped flared pipe with a crenellated pavilion Father Plumier assured me that the Jalap, which is brought to us with the root of America, was a true species of Belle de nuit. We have also received the seed, which has produced in the Jardin Royal de Paris a plant quite like the common Belle de nuit; but this seed is more wrinkled, and the leaves of the plant are less smooth."

It is a perennial, herbaceous, bushy plant that reaches stature heights of mostly 1 meter, rarely up to 2 meters, in height. It may also be grown as an annual, especially in the temperate zone. The single seeded fruits are spherical, wrinkled and black upon maturity, having started out greenish yellow. The stems are thick, full, quadrangular with many ramifications and rooting at the nodes. The posture is often prostrate. A curious aspect of M. jalapa is that flowers with different colors grow simultaneously on the same plant. Additionally, an individual flower can be splashed with different colors. Flower patterns are referred to as sectors (whole sections of flower), flakes (stripes of varying length), and spots. A single flower can be plain yellow, red, magenta, pink, or white, or have a combination of sectors, flakes, and spots. Furthermore, different combinations of flowers and patterns can occur on different flowers of the same plant. Usually, the flowers are yellow, pink and white, but a different combination of flowers growing on the same single four o’clock plant can be found. Another interesting point is a color changing phenomenon. For example, in the yellow variety, as the plant matures, it can display flowers that gradually change to a dark pink colour. Similarly, white flowers can change to light violet. Despite their appearance, the flowers are not formed from petals – rather they are a pigmented modification of the calyx. Similarly, the 'calyx' is an involucre of bracts. The flowers are funnel shaped and pentalobed, they have no cup (replaced by bracteal leaves) but are made of a corolla. The inflorescences contain three to seven unpopped flowers. Earning the name "four o'clock flower", the fragrant flowers open in the late afternoon or early evening, and also in overcast weather, and exhale a scent reminiscent of the tobacco flower, and attract moths for pollination. The anthesis lasts from 16 to 20 hours and thus remains visible part of the day. The flowers are pollinated by long tongued moths of the family Sphingidae, such as the sphinx moths or hawk moths and other nocturnal pollinators attracted by the fragrance.

The plant does best in full sun. Often in the sun the leaves wither, then return vigorously in the evening, when temperatures start to fall and the sun sets. It cannot stand the cold as the aerial part, with the first frosts, deteriorates and can die, but the underground part that can return to vegetate in spring remains vital. The plant will self seed, often spreading rapidly if left unchecked in a garden. Some gardeners recommend that the seeds should be soaked before planting, but this is not totally necessary. In North America, the plant perennializes in warm, coastal environments, particularly in USDA zones 7–10. The plant is easy to grow, as long as it is sunny or partially shaded. Under these conditions, it grows very quickly. It grows preferably in light soil, rich in humus and well draining, it is neutral side acidity (pH). Pot cultivation is always possible with a mixture of 80% soil and 20% garden soil and a very deep container with the tubers being put at a depth of 10 cm. It is usually sown from mid February to May. The seeds germinate rapidly at a temperature of 18 °C.

Mirabilis jalapa is native to the dry tropical regions of North, Central and South America: Mexico, Guatemala, Chile and Peru. This plant has been introduced for ornamental purposes and has become naturalized throughout tropical, subtropical and temperate regions of the world. It is currently present in many countries in Asia, Africa, United States, Middle East and Europe. In Réunion, Mirabilis jalapa was initially an ornamental species; however it became naturalized on the west coast, between 400 and 700 m altitude, and on the south coast between 0 and 700 m. It occurs in a ruderal debris area, and is relatively common in weedy sugarcane fields on the west and south coasts. Its high seed production and rapid growth allow it to cover up to 30% to 50% in cane plots. In cooler subtropical and temperate regions, it will die back with the first frosts or as the weather starts to cool down (especially after it fully matures and finished self seeding), regrowing in the following spring from the tuberous roots.

Around 1900, Carl Correns used Mirabilis as a model organism for his studies on cytoplasmic inheritance. He used the plant's variegated leaves to prove that certain factors outside the nucleus affected phenotype in a way not explained by Mendel's theories. Correns proposed that leaf colour in Mirabilis was passed on via a uni parental mode of inheritance.

Eight betaxanthins (indicaxanthin, vulgaxanthin I, miraxanthin I, II, III, IV, V and VI) can be isolated from M. jalapa flowers. Rotenoids (mirabijalone A, B, C and D, 9 O methyl 4 hydroxyboeravinone B, boeravinone C and boeravinone F, and 1,2,3,4 tetrahydro 1 methylisoquinoline 7,8 diol) can be isolated from the roots. A fatty acid (8 hydroxyoctadeca cis 11,14 dienoic acid) is found as a minor component in the seed oil. Analysis of the methanolic extract of the aerial parts yields β sitosterol, stigmasterol, ursolic acid, oleanolic acid and brassicasterol. Bioassay guided fractionation of an organic extract of the cell mass from a manipulated plant cell culture of M. jalapa led to the isolation and subsequent identification of an isoflavone, a roteinoid and a dehydrorotenoid. Two of these compounds are responsible for the antimicrobial activity against Candida albicans. Bioassay guided fractionation of the methanolic extract of M. jalapa also led to the isolation of an active polyphenolic amide: N trans feruloyl 4′ O methyldopamine. This compound shows moderate activity as an efflux pump inhibitor against multidrug resistant Staphylococcus aureus.

The flowers are used in food colouring. The leaves may be eaten cooked as well, but only as an emergency food. An edible crimson dye is obtained from the flowers to color cakes and jellies. The plant has a potential for the bioremediation of soils polluted with moderate concentrations of heavy metals such as cadmium. In Brazil, the Indian Kayapo sniff the powder of dried flowers to cure headaches and use the root decoction to wash wounds and treat skin conditions such as leprosy. In Peru, juice extracted from flowers is used for herpes lesions and earache. The juice extracted from the root is used to treat earache, diarrhea, dysentery, syphilis and liver infections. In Mexico, decoctions of the whole plant are used for dysentery, infected wounds, and bee and scorpion stings. Flower extract can be used as a natural pH indicator in acid–base titration. This was found and demonstrated to be both economical and accurate by Shishir et al. 2008. Some studies suggest that M. jalapa is an ancient introduction to the Himalayan region.