Презентация The largest flowers in the world Pupils from 9b: Yakovlev Artyom, Ivanov Alexander Teacher: Yakimova A. N. онлайн

Содержание слайда: The largest flowers in the world Pupils from 9b: Yakovlev Artyom, Ivanov Alexander Teacher: Yakimova A.N.

Содержание слайда: Plan: 1.The giant water lily Victoria amazonica 2.What is the larges Cactus in the world? 3.Corpse flower(Rafflesia arnoldii- the larhest flower) 4.Titan arum 5.Refrence

Содержание слайда: Victoria amazonica There are a lot of flowers in the world but there are very few giant flowers. And I will speak about them. One of them is the water lily

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Содержание слайда: Victoria is a genus of water lilies, in the plant family Nymphaeaceae, with very large leaves that float on the water's surface. Victoria amazonica has a leaf that is up to 3 m (9.8 ft) in diameter, on a stalk 7–8 m (22.9-26.2 ft) in length. The genus name was given in honour of Queen Victoria of the United Kingdom

Содержание слайда: The leaf of Victoria is able to support quite a large weight due to the plant's structure, although the leaf itself is quite delicate: so much so that "a straw held 6 inches above and dropped perpendicularly upon it would readily pass through it".[3] To counter the fragile nature of the leaf, the weight needs to be distributed across the surface through mechanical means, such as a sheet of plywood. This allows the leaf to support up to 70 pounds

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Содержание слайда: The most interesting thing about this flower is the large leaves that it creates. The leaves can grow up to 46 centimeters in size and can hold up to 136 kilograms, the leaves are flat before growing rims at the edge of the leaf. The leaves are strong and stiff thanks to the strong bottom of the leaves. The bottoms are covered with spines to help support the ribs. The bottom of the leaf is maroon in colour. The Giant Water Lily does not grow year round in areas where it is not a native species, such as Great Britain; it only grows and reproduces in the summertime when the climate is warm. However, in its native Brazil and in the Amazon it grows all year long, due to the optimum conditions.

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Содержание слайда: The underside of the giant water lily is covered with sharp, inch-long spines which protect the pad from herbivorous fishes. The spines are apparently toxic, because being pricked by one is said to be extremely painful. Underwater parts (root and stem) and seed of the plant are edible. The pattern of ribs helps support the huge leaf. The underside of the giant water lily is covered with sharp, inch-long spines which protect the pad from herbivorous fishes. The spines are apparently toxic, because being pricked by one is said to be extremely painful. Underwater parts (root and stem) and seed of the plant are edible. The pattern of ribs helps support the huge leaf.

Содержание слайда: What Is the Largest Cactus in the World?

Содержание слайда: The Saguaro Cactus and Its Ecosystem This cactus is extremely useful to humans and animals living in the desert. Several species of birds including woodpeckers, owls, house finches and purple martins make their homes in the Sanguaro’s thick stem. Native Americans used the cactus’ ribs in building their homes. Today the Sanguaro is a highly protected species. Arizona state law forbids damaging or taking down this cactus. Even road and house constructions need special permission from the local government if there is need to cut down a plant. The Saguaro in Film and Advertising The Saguaro cactus with its broad, fork-like stems has become one of the most recognizable features of the American desert. It is recognized by a straight central branch flanked by several shorter arms. If there is one cactus everyone is familiar with, it is the Saguaro. But the Saguaro is not as widespread as its over-exposure in the media would have people believe. The largest cactus in the world can be found only in very specific areas in the United States. Sanguaros are not native to Utah, New Mexico, Texas, Colorado and Nevada, and very few are found in California. It is not even seen in northern Arizona.

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Содержание слайда: The outside skin of the saguaro is smooth. Inside the full grown saguaro there are 2 inch spines that absorb water. The saguaro then expands like an accordion. It can hold about a ton of water in those spines.

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Содержание слайда: Corpse flower (Rafflesia arnoldii) - the largest flower Interesting facts about corpse flower (Rafflesia arnoldii) - the largest flower in the plant kingdom (diameter from 60 cm to 1 m with a weight of up to 11 kg).

Содержание слайда: Rafflesia From Wikipedia, the free encyclopedia

Содержание слайда: The plant has no stems, leaves or true roots. It is an endoparasite of vines in the genus Tetrastigma (Vitaceae), spreading its root-like haustoria inside the tissue of the vine. The only part of the plant that can be seen outside the host vine is the five-petaled flower. In some species, such as Rafflesia arnoldii, the flower may be over 100 centimetres (39 in) in diameter, and weigh up to 10 kilograms (22 lb). Even the smallest species, R. manillana, has 20 cm diameter flowers. The flowers look and smell like rotting flesh, hence its local names which translate to "corpse flower" or "meat flower" (but see below). The vile smell that the flower gives off attracts insects such as flies and carrion beetles, which transport pollen from male to female flowers. Little is known about seed dispersal. However, tree shrews and other forest mammals apparently eat the fruits and disperse the seeds. Rafflesia is an official state flower of Indonesia, also Sabah state in Malaysia, as well as for the Surat Thani Province, Thailand. The name "corpse flower" applied to Rafflesia is confusing because this common name also refers to the Titan Arum (Amorphophallus titanum) of the family Araceae. Moreover, because Amorphophallus has the world's largest unbranched inflorescence, it is sometimes mistakenly credited as having the world's largest flower. Both Rafflesia and Amorphophallus are flowering plants, but they are still distantly related. Rafflesia arnoldii has the largest single flower of any flowering plant, at least when one judges this by weight. Amorphophallus titanum has the largest unbranched inflorescence, while the Talipot palm (Corypha umbraculifera) forms the largest branched inflorescence, containing thousands of flowers; this plant is monocarpic, meaning that individuals die after flowering.

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Содержание слайда: The largest flowers in the world belong to Rafflesia genus, found in southeastern Asia (Malaya, Borneo, Sumatra, Philippines). The biggest of all is that of R. arnoldii, from Borneo and Sumatra: 11 kg, 1 m (3 feet) wide. The flower is blood-red and spreads a rotten-flesh stink, which attracts carrion flies for pollination. But since the discovery of these plants - less than two centuries ago - they posed an enigma. Rafflesia are parasitic plants with an unusual trait. As they live on the jungle floor, extracting food from the roots of a tropical vine (Tetrastigma), they lost all organs: stem, roots, leaves. As they do not make photosynthesis, Rafflesia do not need those organs. So, scientists found it very difficult to classify these species, creating a whole family only for them, Rafflesiaceae, and an order, Rafflesiales. "These plants are so strange - almost extra-terrestrial - wherever they were placed [within the family tree] there would be a lot of explaining to do", said Charles Davis, assistant professor of organismic and evolutionary biology at Harvard University. But in the DNA analysis era, this obstacle could be surpassed, and to their surprise, the bizarre plants were proven to belong to the Euphorbiaceae family. The big surprise was that all plants in these family bear tiny blooms. The most economically important species in this family are the rubber tree, castor oil plant and the cassava shrub, but in the temperate zone the most known spontaneous species are the spurges. "The big shocker, of course, is that they fall in the middle of this group with minute flowers", added Davis. DNA analysis showed that 46 million years ago, the plants' blooms began to evolve at an accelerated pace, increasing from a tiny 2mm (0.08in) up to their enormous size. "These plants occur exclusively in tropical rainforest under-storeys, which are very dimly lit, and they are restricted to the forest floor. They don't have an easy way of presenting their flowers to various insects for pollination", said Davis. "By maximising their surface area it is much easier to waft the funky smell further

Содержание слайда: The Rafflesia arnoldii is the world's largest flower. Photograph by Harry Wiriadinata and Suwito Alam from article in Voice of Nature, v. 84, August 1990, p. 14. File:Rafflesia arnoldii and buds.JPG

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Содержание слайда: Another enormous flower found in Indonesia is the Amorphophallus titanum, or Titan arum. It is also known as the "corpse flower" for its unpleasant odor. Like the Rafflesia, the Titan emits the smell of rotting flesh to attract pollinators. Technically, the Titan arum is not a single flower. It is a cluster of many tiny flowers, called an inflorescence. The Titan arum has the largest unbranched inflorescence of all flowering plants. The plant can reach heights of 7 to 12 feet and weigh as much as 170 pounds

Содержание слайда: This flower in Mexico only blooms once every 40 years for 4 days. How magnificent is God's creation!

Содержание слайда: The largest flower in the world is blossoming in the mountainous region of Rio Blanco, Veracruz, Mexico . Two meters high, it has the peculiarity of blooming only during four days every 40 years.

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Содержание слайда: While bloomings of the Amorphophallus titanum are certainly rare, and the flowers only last for two or three days, it is not true that they only bloom once every forty years as claimed in the message. The specimens kept in various botanical gardens often go for several years between blooms. However, the plants are not set to a forty year blooming cycle and many specimens have bloomed much more regularly. In "The Private Life Of Plants", David Attenborough suggests that Amorphophallus titanum in the wild bloom about once every 1000 days. Thus, it seems clear that an unknown prankster has simply taken the picture of the Wilhelma Titan Arum and tacked on some fanciful information about Mexico and a fictitious forty year bloom cycle

Содержание слайда: References Где растет самый большой в мире цветок?-http://www.vokrugsveta.ru/quiz/419/ Самые большие цветы на планете – http://greenword.ru/2008/09/biggest-flowers.html Выяснено происхождение самого большого цветка http://elementy.ru/news/430491 Трупная лилия (Rafflesia arnoldii) - самый большой цветок - интересные факты http://www.flowerstoday.ru/articles/article01.html World’s largest flower http://www.loc.gov/rr/scitech/mysteries/flower.html The Largest Flower in the World http://www.chevroncars.com/learn/wondrous-world/largest-flower-world Largest Flower Evolved From Family Of Much Tinier Blooms http://www.terradaily.com/reports/Largest_Flower_Evolved_From_Family_Of_Much_Tinier_Blooms_999.html Mature Rafflesia arnoldii flower with buds http://www.the-andaman-eye.net/Khaosok/Rafflesia.php http://www.kew.org/plants/titan/timelapse.html http://www.kew.org/plants/titan/ They belong to a family of tiny flowers! http://news.softpedia.com/news/DNA-Analysis-Has-Showed-The-Biggest-Flowers-on-Earth-to-be-Related-With-Rubber-Tree-44250.shtml http://in.answers.yahoo.com/question/index?qid=20090119105529AAjeP2l Rafflesia