|
Fourraea Alpina
''Fourraea alpina'' is a species of flowering plant in the family Brassicaceae, and the only member of the genus ''Fourraea''. It is native to Europe, where its range extends from Spain in the west to Croatia in the east, and from Belgium and Czechia in the north to Italy in the south. Its synonyms include: *''Arabis brassica'' * ''Arabis brassiciformis'' * ''Arabis pauciflora'' * '' Brassica alpina'' * ''Caulopsis alpina'' * ''Caulopsis pauciflora'' * ''Conringia alpina'' * ''Turritis brassica'' * ''Turritis pauciflora'' It has a diploid Ploidy () is the number of complete sets of chromosomes in a cell, and hence the number of possible alleles for autosomal and pseudoautosomal genes. Sets of chromosomes refer to the number of maternal and paternal chromosome copies, respectively ... chromosome number of 2n=14. Gallery Fourraea alpina - Iconographia botanica seu plantae criticae - t. 192 - fig. 333.jpg Fourraea alpina.jpg Fourraea alpina leaf (04).jpg Fourraea a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Werner Greuter
Werner Rodolfo Greuter, (born February 27, 1938) in Genoa, Italy, as a Swiss national, is a botanist. He is the chair of the Editorial Committee for the ''International Code of Botanical Nomenclature'' (''ICBN'') - the ''Tokyo Code'' (1994) and the ''St Louis Code'' (2000). His proposed policy as regards registration of botanical names proved unpopular and in 1999 he stepped back, not being elected anew: he completed his term as chair to be succeeded at Vienna in 2005. He has returned as a member of the editorial committee, contributing to the renamed International Code of Nomenclature for algae, fungi, and plants, the "Melbourne Code" (2012). Biography Greuter went to schools in Bellinzona and Winterthur, and received his PhD from the University of Zürich in 1972. From 1972 to 1974 he was scientific director of the Goulandris Museum of Natural History in Kifisia, Athens, and edited its journal, ''Annales Musei Goulandris'' till 1976, being succeeded by W. T. Stearn. He was a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brassicaceae
Brassicaceae () or (the older) Cruciferae () is a medium-sized and economically important family of flowering plants commonly known as the mustards, the crucifers, or the cabbage family. Most are herbaceous plants, while some are shrubs. The leaves are simple (although are sometimes deeply incised), lack stipules, and appear alternately on stems or in rosettes. The inflorescences are terminal and lack bracts. The flowers have four free sepals, four free alternating petals, two shorter free stamens and four longer free stamens. The fruit has seeds in rows, divided by a thin wall (or septum). The family contains 372 genera and 4,060 accepted species. The largest genera are ''Draba'' (440 species), ''Erysimum'' (261 species), ''Lepidium'' (234 species), ''Cardamine'' (233 species), and ''Alyssum'' (207 species). The family contains the cruciferous vegetables, including species such as ''Brassica oleracea'' (cultivated as cabbage, kale, cauliflower, broccoli and collards), ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diploid
Ploidy () is the number of complete sets of chromosomes in a cell, and hence the number of possible alleles for autosomal and pseudoautosomal genes. Sets of chromosomes refer to the number of maternal and paternal chromosome copies, respectively, in each homologous chromosome pair, which chromosomes naturally exist as. Somatic cells, tissues, and individual organisms can be described according to the number of sets of chromosomes present (the "ploidy level"): monoploid (1 set), diploid (2 sets), triploid (3 sets), tetraploid (4 sets), pentaploid (5 sets), hexaploid (6 sets), heptaploid or septaploid (7 sets), etc. The generic term polyploid is often used to describe cells with three or more chromosome sets. Virtually all sexually reproducing organisms are made up of somatic cells that are diploid or greater, but ploidy level may vary widely between different organisms, between different tissues within the same organism, and at different stages in an organism's life cycle. Half ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chromosome
A chromosome is a long DNA molecule with part or all of the genetic material of an organism. In most chromosomes the very long thin DNA fibers are coated with packaging proteins; in eukaryotic cells the most important of these proteins are the histones. These proteins, aided by chaperone proteins, bind to and condense the DNA molecule to maintain its integrity. These chromosomes display a complex three-dimensional structure, which plays a significant role in transcriptional regulation. Chromosomes are normally visible under a light microscope only during the metaphase of cell division (where all chromosomes are aligned in the center of the cell in their condensed form). Before this happens, each chromosome is duplicated ( S phase), and both copies are joined by a centromere, resulting either in an X-shaped structure (pictured above), if the centromere is located equatorially, or a two-arm structure, if the centromere is located distally. The joined copies are now called si ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
