Monday, 18 July 2016

a brief history of bananas in the world

The banana plant is the largest herbaceous flowering plant.[7] All the above-ground parts of a banana plant grow from a structure usually called a "corm".[8] Plants are normally tall and fairly sturdy, and are often mistaken for trees, 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 cm deep, has good drainage and is not compacted.[9] 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.[10] 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.[11][12]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.[13]
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.[14] 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.[15]) 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.[16] 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.[17]
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 (0.276 lb), of which approximately 75% is water and 25% dry matter (nutrient table, lower right).
The fruit has been described as a "leathery berry".[18] 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.[19] In cultivated varieties, the seeds are diminished nearly to non-existence; their remnants are tiny black specks in the interior of the fruit.[20]
Bananas are naturally slightly radioactive,[21][22] more so than most other fruits, because of their potassium content and the small amounts of the isotope potassium-40 found in naturally occurring potassium.[23] The banana equivalent dose of radiation is sometimes used in nuclear communication to compare radiation levels and exposures.[24]

earlier cultivation of bananas in the world

Farmers in Southeast Asia and Papua New Guinea first domesticated bananas. Recent archaeological and palaeoenvironmental evidence at Kuk Swamp in the Western Highlands Province of Papua New Guinea suggests that banana cultivation there goes back to at least 5000 BCE, and possibly to 8000 BCE.[4][44] It is likely that other species were later and independently domesticated elsewhere in Southeast Asia. Southeast Asia is the region of primary diversity of the banana. Areas of secondary diversity are found in Africa, indicating a long history of banana cultivation in the region.[45]
Map stating that banana cultivation occurred in pre-Islamic times in India and Southeast Asia, during the 700–1500 CE "Islamic period" along the Nile River and in Mesopotamia and Palestine, and less-certainly in sub-Saharan Africa during that same period
Actual and probable diffusion of bananas during Islamic times (700–1500 CE)[46]
Phytolith discoveries in Cameroon dating to the first millennium BCE[47] triggered an as yet unresolved debate about the date of first cultivation in Africa. There is linguistic evidence that bananas were known in Madagascar around that time.[48] The earliest prior evidence indicates that cultivation dates to no earlier than late 6th century CE.[49] It is likely, however, that bananas were brought at least to Madagascar if not to the East African coast during the phase of Malagasy colonization of the island from South East Asia c. 400 CE.[50]
The banana may also have been present in isolated locations elsewhere in the Middle East on the eve of Islam. The spread of Islam was followed by far-reaching diffusion. There are numerous references to it in Islamic texts (such as poems andhadiths) beginning in the 9th century. By the 10th century the banana appears in texts from Palestine and Egypt. From there it diffused into North Africa and Muslim Iberia. During the medieval ages, bananas from Granada were considered among the best in the Arab world.[46] In 650, Islamic conquerors brought the banana to Palestine. Today, banana consumption increases significantly in Islamic countries during Ramadan, the month of daylight fasting.[51]
Bananas were certainly grown in the Christian Kingdom of Cyprus by the late medieval period. Writing in 1458, the Italian traveller and writer Gabriele Capodilista wrote favourably of the extensive farm produce of the estates at Episkopi, near modern-day Limassol, including the region's banana plantations.[52]
Bananas were introduced to the Americas by Portuguese sailors who brought the fruits from West Africa in the 16th century.[53]
Many wild banana species as well as cultivars exist in extraordinary diversity in India, China, and Southeast Asia.
There are fuzzy bananas whose skins are bubblegum pink; green-and-white striped bananas with pulp the color of orange sherbet; bananas that, when cooked, taste like strawberries. The Double Mahoi plant can produce two bunches at once. The Chinese name of the aromatic Go San Heong banana means 'You can smell it from the next mountain.' The fingers on one banana plant grow fused; another produces bunches of a thousand fingers, each only an inch long.
— Mike Peed, The New Yorker[54]
In 1999 archaeologists in London discovered what they believed to be the oldest banana in the UK, in a Tudor rubbish tip.[55

Thursday, 12 May 2016

banana role is use as vagitables

Cultural roles

Coconut, banana and banana leaves used while worshiping River Kaveri atTiruchirappalli, India.
Banana flowers and leaves for sale in the Thanin market in Chiang Mai,Thailand.

Arts

  • The song "Yes! We Have No Bananas" was written by Frank Silver and Irving Cohn and originally released in 1923; for many decades, it was the best-selling sheet music in history. Since then the song has been rerecorded several times and has been particularly popular during banana shortages.[105][106]
  • A person slipping on a banana peel has been a staple of physical comedy for generations. An American comedy recording from 1910 features a popular character of the time, "Uncle Josh", claiming to describe his own such incident:[107]
Now I don't think much of the man that throws a banana peelin' on the sidewalk, and I don't think much of the banana peel that throws a man on the sidewalk neither ... my foot hit the bananer peelin' and I went up in the air, and I come down ker-plunk, jist as I was pickin' myself up a little boy come runnin' across the street ... he says, "Oh mister, won't you please do that agin? My little brother didn't see you do it."
  • The poet Bashō is named after the Japanese word for a banana plant. The "bashō" planted in his garden by a grateful student became a source of inspiration to his poetry, as well as a symbol of his life and home.[108]
  • The cover artwork for the debut album of The Velvet Underground features a banana made by Andy Warhol. On the original vinyl LP version, the design allowed the listener to "peel" this banana to find a pink, peeled phallic banana on the inside.[109]

Thursday, 17 March 2016

one biggest cultivater of banana

The total number of cultivars of bananas and plantains has been estimated to be anything from around 300 to more than 1000. Names are highly confused, even within a single country. Many common names do not refer to a single cultivar or clone; for example 'Lady's Finger' or 'Lady Finger' has been used as the name for members of different genome groups, including AA and AAB. Many other names are synonyms of cultivars grown in the same or different countries.[9] Attempts have been made to create lists of synonyms. In 2000, Valmayor et al. listed equivalent local names for 68 cultivars across five Southeast Asian countries (the Philippines, Malaysia, Indonesia, Thailand and Vietnam), together with their internationally used names. They considered a further 81 cultivars to be unique to one country.[1] In 2007, Ploetz et al. listed more cultivar names and synonyms, with an emphasis on those grown in the islands of the Pacific, but including some grown in areas such as India, Africa and South America. As an example, for the widely grown cultivar 'Dwarf Cavendish', they gave 58 synonyms from 29 different countries or geographical areas.[9] ProMusa has created a checklist of banana cultivar names based on available literature.[10]
A recent development is the use of "somaclones" in banana cultivation. Micropropagation involves growing plants from very small amounts of source tissue, sometimes even a single cell, under sterile conditions using artificial techniques to induce growth. The purpose of micropropagation is often to produce a large number of genetically identical offspring. However, by inducing mutations through various means, it is possible to produce plants which differ slightly from the "parent" plant and from each other ("somaclonal variations"). By growing on these somaclones and selecting those with desirable features, new cultivars can be produced which are very similar to an existing cultivar, but differ in one or two features, such as disease resistance. Somaclones may only be distinguishable bygenetic analysis.[11]

AA Group[edit]

Diploid Musa acuminata, both wild banana plants and cultivars

AAA Group[edit]

some companies to cultivate banana as commercially

Photo of four several large green, smaller red, very small yellow, and medium-sized yellow bananas
Left to right: plantains, Red, Latundan, and Cavendish bananas.
The following is a list of banana cultivars and the groups into which they are classified. Almost all modern cultivated varieties (cultivars) of edible bananas and plantains are hybrids and polyploids of two wild, seeded banana species,Musa acuminata and Musa balbisiana. Cultivated bananas are almost always seedless (parthenocarpic) and hence sterile, so they are propagated vegetatively. They are classified into groups according to a genome-based system introduced by Ernest Cheesman, Norman Simmonds, and Ken Shepherd, which indicates the degree of genetic inheritance from the two wild parents and the number of chromosomes (ploidy). Cultivars derived from Musa acuminataare more likely to be used as dessert bananas, while those derived from Musa balbisiana and hybrids of the two are usually plantains or cooking bananas.[1][2][3]

Wednesday, 9 March 2016

banana usess chart

Characters used to classify banana cultivars derived from M. acuminata and M. balbisiana[7]
CharacterM. acuminataM. balbisiana
Color of pseudostemBlack or grey-brown spotsUnmarked or slightly marked
Petiole canalErect edge, with scarred inferior leaves, not against the pseudostemClosed edge, without leaves, against the pseudostem
StalkCovered with fine hairSmooth
PedicelsShortLong
OvumTwo regular rows in the loculeFour irregular rows in the locule
Elbow of the bractTall (< 0.28)Short (> 0.30)
Bend of the bractThe bract wraps behind the openingThe bract raises without bending behind the opening
Form of the bractLance- or egg-shaped, tapering markedly after the bendBroadly egg-shaped
Peak of the bractAcuteObtuse
Color of the bractDark red or yellow on the outside, opaque purple or yellow on the insideBrown-purple on the outside, crimson on the inside
DiscolorationThe inside of the bract is more bright toward the baseThe inside of the bract is uniform
Scarification of the bractProminentNot prominent
Free tepal of the male flowerCorrugated under the pointRarely corrugated
Color of the male flowerWhite or creamPink
Color of the markingsOrange or bright yellowCream, yellow, or pale pink

Classification of cultivars


Banana plants were originally classified by Linnaeus into two species, which he called Musa paradisiaca – those used as cooking bananas (plantains), and M. sapientum – those used as dessert bananas. The primary center of diversity of cultivated bananas is Southeast Asia. Botanical exploration of this area led to many more species being named, along with subspecies and varieties. However, this approach proved inadequate to deal with the large number of cultivated varieties (cultivars) which were discovered, and many of the names later proved to be synonyms.[1] Furthermore, it was discovered that most cultivated bananas are actually hybrids between two wild species, M. acuminata and M. balbisiana, both first described in 1820 by the Italian botanist Luigi Aloysius Colla,[4] and that Linnaeus' two "species" were both this hybrid, which is now called M. × paradisiaca.[5] Unlike the wild species, which have seeds, cultivated bananas are almost always seedless (parthenocarpic) and hence sterile, so they have to be propagated vegetatively.
In 1955, researchers Norman Simmonds and Ken Shepherd proposed abandoning traditional Latin-based botanical names for cultivated bananas.[3] This approach foreshadowed the International Code of Nomenclature for Cultivated Plants which, in addition to using Latin names based on the International Code of Nomenclature for algae, fungi, and plants, gives cultivars names in a currently spoken language, enclosed in single quotes, and organizes them into "cultivar groups", also not given Latin names.[6]
Banana cultivars derived from M. acuminata and M. balbisiana can be classified into cultivar groups using two criteria. The first is the number of chromosomes: whether the plant is diploid, triploid or tetraploid. The second is relationship to the two ancestral species, which may be determined by genetic analysis or by a scoring system devised by Simmonds and Shepherd. A cultivar is scored on 15 characters, chosen because they differ between the two species. Each character is given a score between one and five according to whether it is typical of M. acuminata or of M. babisiana or is in between. Thus the total score for a cultivar will range from 15 if all characters agree with M. acuminata to 75 if all characters agree with M. balbisiana. Intermediate scores suggest mixed ancestry: for example, 45 would be expected for diploids with equal genetic contributions from both species.[7]
Groups are then named using a combination of the letters "A" and "B". The number of letters shows the ploidy; the proportion of As and Bs the contributions of the ancestral species. The AAB Group, for example, comprises triploid cultivars with more genetic inheritance from M. acuminata than M. balbisiana. A character score of around 35 is expected for members of this group. Within groups, cultivars may be divided into subgroups and then given a cultivar name, e.g. Musa AAA Group (Cavendish Subgroup) 'Robusta'.[7]