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Double-flowered
"Double-flowered" describes varieties of flowers with extra petals, often containing flowers within flowers. The double-flowered trait is often noted alongside the scientific name with the abbreviation ''fl. pl.'' (''flore pleno'', a Latin ablative case, ablative form meaning "with full flower"). The first abnormality to be documented in flowers, double flowers are popular varieties of many commercial flower types, including roses, camellias and Dianthus caryophyllus, carnations. In some double-flowered varieties all of the reproductive organs are converted to petals. As a result, they are sexually sterility (physiology), sterile and must be propagated through cuttings. Many double-flowered plants have little wildlife value as access to the nectaries is typically blocked by the mutation. History Double flowers are the earliest documented form of floral abnormality, first recognized more than two thousand years ago. Theophrastus mentioned double roses in his ''Enquiry into Plant ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lilac
''Syringa'' is a genus of 12 currently recognized species of flowering woody plants in the olive family or Oleaceae called lilacs. These lilacs are native to woodland and scrub from southeastern Europe to eastern Asia, and widely and commonly cultivated in temperate areas elsewhere.Flora Europaea''Syringa''/ref>Flora of China丁香属 ding xiang shu ''Syringa''/ref>Flora of Pakistan''Syringa''/ref>Germplasm Resources Information Network''Syringa'' The genus is most closely related to '' Ligustrum'' (privet), classified with it in Oleaceae tribus Oleeae subtribus Ligustrinae.University of Oxford, Oleaceae information siteNew classification of the Oleaceae/ref> Lilacs are used as food plants by the larvae of some moth species, including lilac leaf mining moth, privet hawk moth, copper underwing, scalloped oak and Svensson's copper underwing. Description Lilacs are small trees, ranging in size from tall, with stems up to diameter. The leaves are opposite (occasionally ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ABC Model
The ABC model of flower development is a scientific model of the process by which flowering plants produce a pattern of gene expression in meristems that leads to the appearance of an organ oriented towards sexual reproduction, a flower. There are three physiological developments that must occur in order for this to take place: firstly, the plant must pass from sexual immaturity into a sexually mature state (i.e. a transition towards flowering); secondly, the transformation of the apical meristem's function from a vegetative meristem into a floral meristem or inflorescence; and finally the growth of the flower's individual organs. The latter phase has been modelled using the ABC model, which aims to describe the biological basis of the process from the perspective of molecular and developmental genetics. An external stimulus is required in order to trigger the differentiation of the meristem into a flower meristem. This stimulus will activate mitotic cell division in the apic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rosa Chinensis
''Rosa chinensis'' (), known commonly as the China rose, Chinese rose, or Bengal rose, is a member of the genus '' Rosa'' native to Southwest China in Guizhou, Hubei, and Sichuan Provinces. The first publication of ''Rosa chinensis'' was in 1768 by Nikolaus Joseph von Jacquin in ''Observationum Botanicarum'', 3, p. 7 & plate 55. Description It is a shrub that reaches 1–2 m and grows in hedges or forms thickets. The leaves are pinnate, have 3–5 leaflets, each 2.5–6 cm long and 1–3 cm broad. In the wild species (sometimes listed as ''Rosa chinensis'' var. ''spontanea''), the flowers have five pink to red petals. The fruit is a red hip one to two cm in diameter. The strong branches have a smooth purplish-brown bark, and there may be many to no curved, stocky, flat spines. The alternately-arranged leaves, 12 to 27 cm long, are pinnately divided. The petiole and the rachis are sparsely spiny, with glandular hairs. The leaf blades usually have t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rose
A rose is either a woody perennial plant, perennial flowering plant of the genus ''Rosa'' (), in the family Rosaceae (), or the flower it bears. There are over three hundred Rose species, species and Garden roses, tens of thousands of cultivars. They form a group of plants that can be erect shrubs, climbing, or trailing, with stems that are often armed with sharp Thorns, spines, and prickles, prickles. Their flowers vary in size and shape and are usually large and showy, in colours ranging from white through pinks, reds, oranges and yellows. Most species are native to Asia, with smaller numbers native to Europe, North America, and Northwest Africa. Species, cultivars and hybrid (biology), hybrids are all widely grown for their beauty and often are fragrant. Roses have acquired cultural significance in many societies. Rose plants range in size from compact, miniature roses to climbers that can reach seven meters in height. Different species hybridize easily, and this has been use ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Camellia
''Camellia'' (pronounced or ) is a genus of flowering plants in the family Theaceae. They are found in tropical and subtropical areas in East Asia, eastern and South Asia, southern Asia, from the Himalayas east to Japan and Indonesia. There are more than 220 described species; almost all are found in southern China and Indochina. Camellias are popular ornamental, tea, and woody-oil plants cultivated worldwide for centuries. Over 26,000 cultivars, with more than 51,000 cultivar names, including synonyms, have been registered or published. The leaves of ''Camellia sinensis, C. sinensis'' are processed to create tea, and so are of particular economic importance in East Asia, Southeast Asia, and the Indian subcontinent, with the processed leaves widely sold and consumed globally. The ornamental ''Camellia japonica, C. japonica'', ''Camellia sasanqua, C. sasanqua'' and their Hybrid (biology)#Hybrid plants, hybrids are the source of hundreds of garden cultivars. ''Camellia oleifera, C ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Marsh Marigold
''Caltha palustris'', known as marsh-marigold and kingcup, is a small to medium sized perennial herbaceous plant of the buttercup family, native to marshes, fens, ditches and wet woodland in temperate regions of the Northern Hemisphere. It flowers between April and August, dependent on altitude and latitude, but occasional flowers may occur at other times. Description ''Caltha palustris'' is a high, hairless, fleshy, perennial, herbaceous plant that dies down in autumn and overwinters with buds near the surface of the marshy soil. The plants have many, thick strongly branching roots. Its flowering stems are hollow, erect or more or less decumbent. The alternate true leaves are in a rosette, each of which consist of a petiole that is about four times as long as the kidney-shaped leaf blade, which is between long and wide. The leaf possesses a heart-shaped foot, a blunt tip, and a scalloped to toothed, sometime almost entire margin particularly towards the tip. In their you ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Homeotic
In evolutionary developmental biology, homeosis is the transformation of one organ into another, arising from mutation in or misexpression of certain developmentally critical genes, specifically homeotic genes. In animals, these developmental genes specifically control the development of organs on their anteroposterior axis. In plants, however, the developmental genes affected by homeosis may control anything from the development of a stamen or petals to the development of chlorophyll. Homeosis may be caused by mutations in Hox genes, found in animals, or others such as the MADS-box family in plants. Homeosis is a characteristic that has helped insects become as successful and diverse as they are. Homeotic mutations work by changing segment identity during development. For example, the ''Ultrabithorax'' genotype gives a phenotype wherein metathoracic and first abdominal segments become mesothoracic segments. Another well-known example is ''Antennapedia'': a gain-of-function allele ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Elliot Meyerowitz
Elliot Meyerowitz (born May 22, 1951) is an American biologist. Career Meyerowitz did his undergraduate work at Columbia University (A.B. in biology, 1973), where he worked part-time in the laboratory of Cyrus Levinthal on combined microscopic and computational methods for tracing axons and dendritic trees in the nervous systems of fish. His graduate work was in the Department of Biology at Yale University (Ph.D. 1977), where he worked in the laboratory of Douglas Kankel on the interaction of eye and brain development in Drosophila, by use of genetic mosaics. From 1977 to 1979 he was a postdoctoral fellow in the laboratory of David Hogness in the Biochemistry Department at the Stanford University School of Medicine, developing and using methods for the molecular cloning of genes in the early days of gene cloning and genomics. Since 1980 he has been a faculty member in the Division of Biology at the California Institute of Technology, where he served as division chair from 2000 to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ABC Flower Development
ABC are the first three letters of the Latin script. ABC or abc may also refer to: Arts, entertainment and media Broadcasting * Aliw Broadcasting Corporation, Philippine broadcast company * American Broadcasting Company, a commercial American TV broadcaster ** Disney–ABC Television Group, the former name of the parent organization of ABC * Australian Broadcasting Corporation, one of the national publicly funded broadcasters of Australia ** ABC Television (Australian TV network), the national television network of the Australian Broadcasting Corporation *** ABC TV (Australian TV channel), the flagship TV station of the Australian Broadcasting Corporation *** ABC Canberra (TV station), Canberra, and other ABC TV local stations in state capitals *** ABC Australia (Southeast Asian TV channel), an international pay TV channel * ABC Radio (other), several radio stations * Associated Broadcasting Corporation, the former name of TV5 Network, Inc., a Philippine media company ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stamen
The stamen (: stamina or stamens) is a part consisting of the male reproductive organs of a flower. Collectively, the stamens form the androecium., p. 10 Morphology and terminology A stamen typically consists of a stalk called the filament and an anther which contains sporangium, microsporangia. Most commonly, anthers are two-lobed (each lobe is termed a locule) and are attached to the filament either at the base or in the middle area of the anther. The sterile (i.e. nonreproductive) tissue between the lobes is called the Connective (botany), connective, an extension of the filament containing conducting strands. It can be seen as an extension on the dorsal side of the anther. A pollen grain develops from a microspore in the microsporangium and contains the male gametophyte. The size of anthers differs greatly, from a tiny fraction of a millimeter in ''Wolfia'' spp up to five inches (13 centimeters) in ''Canna iridiflora'' and ''Strelitzia nicolai''. The stamens in a flower ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Incomplete Dominance
In genetics, dominance is the phenomenon of one variant (allele) of a gene on a chromosome masking or overriding the effect of a different variant of the same gene on the other copy of the chromosome. The first variant is termed dominant and the second is called recessive. This state of having two different variants of the same gene on each chromosome is originally caused by a mutation in one of the genes, either new (''de novo'') or inherited. The terms autosomal dominant or autosomal recessive are used to describe gene variants on non-sex chromosomes ( autosomes) and their associated traits, while those on sex chromosomes (allosomes) are termed X-linked dominant, X-linked recessive or Y-linked; these have an inheritance and presentation pattern that depends on the sex of both the parent and the child (see Sex linkage). Since there is only one Y chromosome, Y-linked traits cannot be dominant or recessive. Additionally, there are other forms of dominance, such as incompl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
