A banana is an elongated, edible fruit – botanically a berry[1][2] – produced by several kinds of large herbaceous flowering plants in the genus Musa.[3] In some countries, bananas used for cooking may be called "plantains", distinguishing them from dessert bananas. The fruit is variable in size, color, and firmness, but is usually elongated and curved, with soft flesh rich in starch covered with a rind, which may be green, yellow, red, purple, or brown when ripe. The fruits grow upward in clusters near the top of the plant. Almost all modern edible seedless (parthenocarp) bananas come from two wild species – Musa acuminata and Musa balbisiana. The scientific names of most cultivated bananas are Musa acuminata, Musa balbisiana, and Musa × paradisiaca for the hybrid Musa acuminata × M. balbisiana, depending on their genomic constitution. The old scientific name for this hybrid, Musa sapientum, is no longer used.
Musa species are native to tropical Indomalaya and Australia, and are likely to have been first domesticated in Papua New Guinea.[4][5] They are grown in 135 countries,[6] primarily for their fruit, and to a lesser extent to make fiber, banana wine, and banana beer, and as ornamental plants. The world's largest producers of bananas in 2017 were India and China, which together accounted for approximately 38% of total production.[7]
Worldwide, there is no sharp distinction between "bananas" and "plantains". Especially in the Americas and Europe, "banana" usually refers to soft, sweet, dessert bananas, particularly those of the Cavendish group, which are the main exports from banana-growing countries. By contrast, Musa cultivars with firmer, starchier fruit are called "plantains". In other regions, such as Southeast Asia, many more kinds of banana are grown and eaten, so the binary distinction is not as useful and is not made in local languages.
The term "banana" is also used as the common name for the plants that produce the fruit.[3] This can extend to other members of the genus Musa, such as the scarlet banana (Musa coccinea), the pink banana (Musa velutina), and the Fe'i bananas. It can also refer to members of the genus Ensete, such as the snow banana (Ensete glaucum) and the economically important false banana (Ensete ventricosum). Both genera are in the banana family, Musaceae.
The banana plant is the largest herbaceous flowering plant.[8] All the above-ground parts of a banana plant grow from a structure usually called a "corm".[9] Plants are normally tall and fairly sturdy with a treelike appearance, but what appears to be a trunk is actually a "false stem" or pseudostem. Bananas grow in a wide variety of soils, as long as the soil is at least 60 centimetres (2.0 ft) deep, has good drainage and is not compacted.[10] Banana plants are among the fastest growing of all plants, with daily surface growth rates recorded of 1.4 square metres (15 sq ft) to 1.6 square metres (17 sq ft).[11][12]
The leaves of banana plants are composed of a stalk (petiole) and a blade (lamina). The base of the petiole widens to form a sheath; the tightly packed sheaths make up the pseudostem, which is all that supports the plant. The edges of the sheath meet when it is first produced, making it tubular. As new growth occurs in the centre of the pseudostem the edges are forced apart.[13] Cultivated banana plants vary in height depending on the variety and growing conditions. Most are around 5 m (16 ft) tall, with a range from 'Dwarf Cavendish' plants at around 3 m (10 ft) to 'Gros Michel' at 7 m (23 ft) or more.[14][15] Leaves are spirally arranged and may grow 2.7 metres (8.9 ft) long and 60 cm (2.0 ft) wide.[1] They are easily torn by the wind, resulting in the familiar frond look.[16] When a banana plant is mature, the corm stops producing new leaves and begins to form a flower spike or inflorescence. A stem develops which grows up inside the pseudostem, carrying the immature inflorescence until eventually it emerges at the top.[17] Each pseudostem normally produces a single inflorescence, also known as the "banana heart". (More are sometimes produced; an exceptional plant in the Philippines produced five.[18]) After fruiting, the pseudostem dies, but offshoots will normally have developed from the base, so that the plant as a whole is perennial. In the plantation system of cultivation, only one of the offshoots will be allowed to develop in order to maintain spacing.[19] The inflorescence contains many bracts (sometimes incorrectly referred to as petals) between rows of flowers. The female flowers (which can develop into fruit) appear in rows further up the stem (closer to the leaves) from the rows of male flowers. The ovary is inferior, meaning that the tiny petals and other flower parts appear at the tip of the ovary.[20]
The banana fruits develop from the banana heart, in a large hanging cluster, made up of tiers (called "hands"), with up to 20 fruit to a tier. The hanging cluster is known as a bunch, comprising 3–20 tiers, or commercially as a "banana stem", and can weigh 30–50 kilograms (66–110 lb). Individual banana fruits (commonly known as a banana or "finger") average 125 grams (4+1⁄2 oz), of which approximately 75% is water and 25% dry matter (nutrient table, lower right).
The fruit has been described as a "leathery berry".[21] There is a protective outer layer (a peel or skin) with numerous long, thin strings (the phloem bundles), which run lengthwise between the skin and the edible inner portion. The inner part of the common yellow dessert variety can be split lengthwise into three sections that correspond to the inner portions of the three carpels by manually deforming the unopened fruit.[22] In cultivated varieties, the seeds are diminished nearly to non-existence; their remnants are tiny black specks in the interior of the fruit.[23]
The end of the fruit opposite the stem contains a small tip distinct in texture, and often darker in color. Often misunderstood to be some type of seed or excretory vein, it is actually just the remnants from whence the banana fruit was a banana flower.[24]
As with all living things on earth, potassium-containing bananas emit radioactivity at low levels occurring naturally from potassium-40 (40K or K-40),[25] which is one of several isotopes of potassium.[26][27] The banana equivalent dose of radiation was developed in 1995 as a simple teaching-tool to educate the public about the natural, small amount of K-40 radiation occurring in every human and in common foods.[28][29]
The K-40 in a banana emits about 15 becquerels or 0.1 microsieverts (units of radioactivity exposure),[30] an amount that does not add to the total body radiation dose when a banana is consumed.[25][29] By comparison, the normal radiation exposure of an average person over one day is 10 microsieverts, a commercial flight across the United States exposes a person to 40 microsieverts, and the total yearly radiation exposure from the K-40 sources in a person's body is about 390 microsieverts.[30][better source needed]
The word "banana" is thought to be of West African origin, possibly from the Wolof word banaana, and passed into English via Spanish or Portuguese.[31]
The genus Musa was created by Carl Linnaeus in 1753.[32] The name may be derived from Antonius Musa, physician to the Emperor Augustus, or Linnaeus may have adapted the Arabic word for banana, mauz.[33] According to Roger Blench, the ultimate origin of musa is in the Trans–New Guinea languages, whence they were borrowed into the Austronesian languages and across Asia, via the Dravidian languages of India, into Arabic as a Wanderwort.[34]
Musa is the type genus in the family Musaceae. The APG III system assigns Musaceae to the order Zingiberales, part of the commelinid clade of the monocotyledonous flowering plants. Some 70 species of Musa were recognized by the World Checklist of Selected Plant Families as of January 2013;[32] several produce edible fruit, while others are cultivated as ornamentals.[35]
The classification of cultivated bananas has long been a problematic issue for taxonomists. Linnaeus originally placed bananas into two species based only on their uses as food: Musa sapientum for dessert bananas and Musa paradisiaca for plantains. More species names were added, but this approach proved to be inadequate for the number of cultivars in the primary center of diversity of the genus, Southeast Asia. Many of these cultivars were given names that were later discovered to be synonyms.[36]
In a series of papers published from 1947 onwards, Ernest Cheesman showed that Linnaeus's Musa sapientum and Musa paradisiaca were cultivars and descendants of two wild seed-producing species, Musa acuminata and Musa balbisiana, both first described by Luigi Aloysius Colla.[37] Cheesman recommended the abolition of Linnaeus's species in favor of reclassifying bananas according to three morphologically distinct groups of cultivars – those primarily exhibiting the botanical characteristics of Musa balbisiana, those primarily exhibiting the botanical characteristics of Musa acuminata, and those with characteristics of both.[36] Researchers Norman Simmonds and Ken Shepherd proposed a genome-based nomenclature system in 1955. This system eliminated almost all the difficulties and inconsistencies of the earlier classification of bananas based on assigning scientific names to cultivated varieties. Despite this, the original names are still recognized by some authorities, leading to confusion.[37][38]
The accepted scientific names for most groups of cultivated bananas are Musa acuminata Colla and Musa balbisiana Colla for the ancestral species, and Musa × paradisiaca L. for the hybrid M. acuminata × M. balbisiana.[39]
Synonyms of M. × paradisiaca include
many subspecific and varietal names of M. × paradisiaca, including M. p. subsp. sapientum (L.) Kuntze
Musa × dacca Horan.
Musa × sapidisiaca K.C.Jacob, nom. superfl.
Musa × sapientum L., and many of its varietal names, including M. × sapientum var. paradisiaca (L.) Baker, nom. illeg.
Generally, modern classifications of banana cultivars follow Simmonds and Shepherd's system. Cultivars are placed in groups based on the number of chromosomes they have and which species they are derived from. Thus the Latundan banana is placed in the AAB Group, showing that it is a triploid derived from both M. acuminata (A) and M. balbisiana (B). For a list of the cultivars classified under this system, see "List of banana cultivars".
In 2012, a team of scientists announced they had achieved a draft sequence of the genome of Musa acuminata.[40]
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Oldest fossilized Banana 43 million
Abstract
Fossil seeds of Ensete, a genus presently native to Asia and Africa, have been recovered from the middle Eocene of Oregon, confirming the presence of Musaceae in the North American Tertiary. The seed of Ensete oregonense sp. nov. is operculate, with a well-defined micropylar collar, a pronounced chalazal chamber, and a wide hilar cavity. A survey of seed morphology in extant Zingiberales provides characters for distinguishing Musaceae from other families of the order, furnishes criteria for distinguishing the three extant genera of Musaceae (Musa, Ensete and Musella), and facilitates critical assessment of fossil seed remains. “Musa” cardiosperma Jain from the Cretaceous/Tertiary boundary Deccan Series of India is excluded from Musaceae (although retained in Zingiberales) on the basis of fruit and seed characters, including the lack of laticifers and absence of a chalazal chamber. We reexamined the musaceous seeds from Colombia that previously were described as Tertiary fossils (Musa enseteformis Berry, 1925) and now believe that they are recent, nonfossil remains, evidently from Ensete ventricosum, which is grown in the region where the specimens were originally obtained. In addition, a reputed fossil banana fruit from the Cretaceous of Colombia was reexamined and determined to be a concretion of nonbiological origin. Ensete oregonense is significant therefore, as the first unequivocal fossil record of Ensete and of Musaceae. Although the Musaceae are currently native only to the Old World tropics, this discovery establishes that the family was present in North America about 43 million years ago.
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BANANA AS A SNACK!
WHAT ARE BANANAS?
Bananas are one of the most significant fruit crops in the world and belong to the genus Musa in the family Musaceae. Although the banana is primarily consumed in the tropics, where it is grown, it is prized for its flavor, nutritional content, and year-round availability.
Among other advantages, bananas have essential nutrients that may improve heart health, lower blood pressure, and lift one's mood.
HEALTH BENEFITS:
*Bananas give you energy.
*Bananas are one of the best fruit sources of vitamin B6.
*Bananas are respectable sources of vitamin C.
*Manganese in bananas is good for your skin.
*Potassium in bananas is good for your heart health and blood pressure.
*Bananas can aid digestion and help beat gastrointestinal issues.
WARNING: Those with impaired renal function should avoid excessive potassium intake. It could be dangerous if the kidneys are unable to remove too much potassium from the blood. Beta-blocker users should consume foods high in potassium, such as bananas, in moderation.
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Ensete ventricosum, commonly known as the Ethiopian banana, Abyssinian banana, false banana, enset or ensete, is an herbaceous species of flowering plant in the banana family Musaceae. The name Ensete ventricosum was first published in 1948 in the Kew Bulletin, 1947, p. 101. Its synonyms include Musa arnoldiana De Wild., Musa ventricosa Welw. and Musa ensete J.F.Gmel. It is native to the eastern edge of the Great African Plateau, extending northwards from South Africa .
The abyssinian banana (Ensete ventricosum) is a vital component of Ethiopian food security. The roots, trunk, and growing point of the plant are eaten, and the leaves and harvest residue are fed to cattle. The leaves provide fiber for ropes, sacks, and baskets and when dried make an eco-friendly packaging. Seeds are used for necklaces, rattles, and rosaries.
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