|
Silene (other)
''Silene'' is a genus of flowering plants in the family Caryophyllaceae. Containing nearly 900 species, it is the largest genus in the family. Common names include campion and catchfly. Many ''Silene'' species are widely distributed, particularly in the northern hemisphere. Scientific history Members of this genus have been the subject of research by preeminent plant ecologists, evolutionary biologists, and geneticists, including Charles Darwin, Gregor Mendel, Carl Correns, Herbert G. Baker, and Janis Antonovics. Many ''Silene'' species continue to be widely used to study systems, particularly in the fields of ecology and evolutionary biology.Bernasconi et al. 2009. Silene as a model system in ecology and evolution. Heredity. 103:5-14. PMI19367316/ref> The genus has been used as a model for understanding the genetics of sex determination for over a century. ''Silene'' species commonly contain a mixture of hermaphroditic and female (or male-sterile) individuals ( gynodioecy), a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Silene Dioica
''Silene dioica'' ( syn. ''Melandrium rubrum''), known as red campion and red catchfly, is a herbaceous flowering plant in the family Caryophyllaceae, native throughout central, western and northern Europe, and locally in southern Europe. It has been introduced in Iceland, Canada, the US, and Argentina. Description It is a biennial or perennial plant, with dark pink to red flowers, each 1.8–2.5 cm across. There are five petals which are deeply notched at the end, narrowed at the base and all go into an urn-shaped calyx. As indicated by the specific name, male and female flowers are borne on separate plants (dioecious), the male with 10 stamens and a 10-veined calyx, the female with 5 styles and a 20-veined calyx. The fruit, produced from July onwards, is an ovoid capsule containing numerous seeds, opening at the apex by 10 teeth which curve back. The flowers are unscented. The flowering period is from May to October and the flowers are frequently visited by flies such as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Section (botany)
In botany, a section ( la, sectio) is a taxonomic rank below the genus, but above the species. The subgenus, if present, is higher than the section, and the rank of series, if present, is below the section. Sections may in turn be divided into subsections.Article 4 in Sections are typically used to help organise very large genera, which may have hundreds of species. A botanist wanting to distinguish groups of species may prefer to create a taxon at the rank of section or series to avoid making new combinations, i.e. many new binomial names for the species involved. Examples: * ''Lilium'' sectio ''Martagon'' Rchb. are the Turks' cap lilies * ''Plagiochila aerea'' Taylor is the type species of ''Plagiochila'' sect. ''Bursatae'' See also * Section (biology) References Section Section, Sectioning or Sectioned may refer to: Arts, entertainment and media * Section (music), a complete, but not independent, musical idea * Section (typography), a subdivision, especially ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hadena Bicruris
The lychnis (''Hadena bicruris'') is a moth of the family Noctuidae. It is found in northern and western Europe and Turkey. It has an Atlantic-Mediterranean distribution. In the East Palearctic it is replaced by '' Hadena capsincola''. Description This species has dark brown forewings marked with two prominent white-bordered stigmata and a white subterminal line. The hindwings are buffish, darkening to brown towards the margin but with a prominent white fringe. Seitz states - Distinguished from '' rivularis'' F. by the absence of the violet sheen; the markings white instead of yellow; the upper stigmata not conjoined; a conspicuous black blotch above inner margin near base; hindwing fuscous. Larva dull brown, with darker dorsal line and oblique subdorsal streaks. Biology One or two broods are produced each year and adults can be seen between May and September. Flight is from June to July. The larva feeds on various Caryophyllaceae such as ''Dianthus'', ''Lychnis'', ''Saponaria'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lychnis (moth)
The lychnis (''Hadena bicruris'') is a moth of the family Noctuidae. It is found in northern and western Europe and Turkey. It has an Atlantic-Mediterranean distribution. In the East Palearctic it is replaced by '' Hadena capsincola''. Description This species has dark brown forewings marked with two prominent white-bordered stigmata and a white subterminal line. The hindwings are buffish, darkening to brown towards the margin but with a prominent white fringe. Seitz states - Distinguished from '' rivularis'' F. by the absence of the violet sheen; the markings white instead of yellow; the upper stigmata not conjoined; a conspicuous black blotch above inner margin near base; hindwing fuscous. Larva dull brown, with darker dorsal line and oblique subdorsal streaks. Biology One or two broods are produced each year and adults can be seen between May and September. Flight is from June to July. The larva feeds on various Caryophyllaceae such as ''Dianthus'', ''Lychnis'', ''Saponaria'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dionysus
In ancient Greek religion and myth, Dionysus (; grc, Διόνυσος ) is the god of the grape-harvest, winemaking, orchards and fruit, vegetation, fertility, insanity, ritual madness, religious ecstasy, festivity, and theatre. The Romans called him Bacchus ( or ; grc, Βάκχος ) for a frenzy he is said to induce called ''bakkheia''. As Dionysus Eleutherios ("the liberator"), his wine, music, and ecstatic dance free his followers from self-conscious fear and care, and subvert the oppressive restraints of the powerful. His ''thyrsus'', a fennel-stem sceptre, sometimes wound with ivy and dripping with honey, is both a beneficent wand and a weapon used to destroy those who oppose his cult and the freedoms he represents. Those who partake of his mysteries are believed to become possessed and empowered by the god himself. His origins are uncertain, and his cults took many forms; some are described by ancient sources as Thracian, others as Greek. In Orphic religion, he wa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Silenus
In Greek mythology, Silenus (; grc, Σειληνός, Seilēnós, ) was a companion and tutor to the wine Greek god, god Dionysus. He is typically older than the satyrs of the Dionysian retinue (''thiasos''), and sometimes considerably older, in which case he may be referred to as a Papposilenus. The plural ''sileni'' refers to the mythological figure as a type that is sometimes thought to be differentiated from a satyr by having the attributes of a horse rather than a goat, though usage of the two words is not consistent enough to permit a sharp distinction. Silenus presides over other Daimon, daemones and is related to musical creativity, prophetic ecstasy, drunken joy, drunken dances and gestures. Evolution The original Silenus resembled a folkloric man of the forest, with the ears of a horse and sometimes also the tail and legs of a horse. The later sileni were drunken followers of Dionysus, usually bald and fat with thick lips and squat noses, and having the legs of a huma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gynomonoecious
Gynomonoecy is defined as the presence of both female and hermaphrodite flowers on the same individual of a plant species. It is prevalent in Asteraceae but is poorly understood. It is a monomorphic sexual system alongside monoecy, andromonoecy and trimonoecy. Occurrence This sexual system occurs in about 2.8% of flowering plants. It is present in 3% of ''Silene'' species and 23 families of flowering plants, but is most common in the daisy family, Asteraceae. About 200 of the approximately 23000 species in the Asteraceae are gynomonoecious. Evolution Gynomonoecy may be an intermediate evolutionary state between monoecy and hermaphroditism. It is also hypothesized to be the ancestor to trimonoecy. Gynomonecy evolved once in Hawaiian ''Tetramolopium''. In families like Compositae or Chenopodiaceae Amaranthaceae is a family of flowering plants commonly known as the amaranth family, in reference to its type genus ''Amaranthus''. It includes the former goosefoot family Cheno ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Andromonoecious
Andromonoecy is a breeding system of plant species in which male and hermaphrodite flowers are on the same plant. It is a monomorphic sexual system alongside monoecy, gynomonoecy and trimonoecy. Andromonoecy is frequent among genera with zygomorphic flowers, however it is overall rare and occurs in less than 2% of plant species. Nonetheless the breeding system has gained interest among biologists in the study of sex expression. Etymology The word andromonoecious is a combination of andr- (meaning male) and monoecious and was first used in 1877. Prevalence It is uncommon and has been estimated to occur in less than 2% of plant species. In angiosperms, it occurs in 1.7% of angiosperms making up around 4000 species in 33 families. It is common in the grass subfamily Panicoideae. Andromonoecious species * ''Cucumis melo'' subsp * ''Cucumis melo'' * '' Chaerophyllum bulbosum'' * ''Erophaca baetica'' * ''Silene tibetica'' ''Solanum'' * ''Solanum agnewiorum'' * ''Solanum aur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trioecy
Trioecy, or subdioecy, is a rare sexual system characterized by the coexistence of males, females, and hermaphrodites. It has been found in both plants and animals. Trioecy is sometimes referred to as a mixed mating system alongside androdioecy and gynodioecy. Evolution of trioecy Many speculate trioecy is a transient state and is often associated with evolutionary transitioning from gynodioecy to dioecy. Other studies show that trioecious populations originated from gonochoristic ancestors which were invaded by a mutant selfing hermaphrodite, creating a trioecious population. It has been suggested that chromosomal duplication is an important part in the evolution of trioecy. Evolutionary stability Trioecy is usually viewed as evolutionarily unstable, but its exact stability is unclear. Like in brachiopod species trioecy usually breaks into androdioecy or gynodioecy. But one study found that trioecy can be stable under nucleocytoplasmic sex determination. Another theoretical ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gynomonoecious
Gynomonoecy is defined as the presence of both female and hermaphrodite flowers on the same individual of a plant species. It is prevalent in Asteraceae but is poorly understood. It is a monomorphic sexual system alongside monoecy, andromonoecy and trimonoecy. Occurrence This sexual system occurs in about 2.8% of flowering plants. It is present in 3% of ''Silene'' species and 23 families of flowering plants, but is most common in the daisy family, Asteraceae. About 200 of the approximately 23000 species in the Asteraceae are gynomonoecious. Evolution Gynomonoecy may be an intermediate evolutionary state between monoecy and hermaphroditism. It is also hypothesized to be the ancestor to trimonoecy. Gynomonecy evolved once in Hawaiian ''Tetramolopium''. In families like Compositae or Chenopodiaceae Amaranthaceae is a family of flowering plants commonly known as the amaranth family, in reference to its type genus ''Amaranthus''. It includes the former goosefoot family Cheno ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gynodioecy
Gynodioecy is a rare breeding system that is found in certain flowering plant species in which female and hermaphroditic plants coexist within a population. Gynodioecy is the evolutionary intermediate between hermaphroditism (exhibiting both female and male parts) and dioecy (having two distinct morphs: male and female). Gynodioecy is sometimes considered a mixed breeding system alongside trioecy and androdioecy. It is also considered a dimorphic sexual system alongside dioecy and androdioecy. Gynodioecy occurs as a result of a genetic mutation that inhibits a hermaphroditic plant from producing pollen, while keeping the female reproductive parts intact. Gynodioecy is extremely rare, with fewer than 1% of angiosperm species exhibiting the breeding system. Some notable taxa that exhibit a gynodioecious mating system include ''Beta vulgaris'' (wild beet), ''Lobelia siphilitica'', ''Silene'', and Lamiaceae. Evolution Gynodioecy is often referred to as the evolutionary intermed ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dioecy
Dioecy (; ; adj. dioecious , ) is a characteristic of a species, meaning that it has distinct individual organisms (unisexual) that produce male or female gametes, either directly (in animals) or indirectly (in seed plants). Dioecious reproduction is biparental reproduction. Dioecy has costs, since only about half the population directly produces offspring. It is one method for excluding self-fertilization and promoting allogamy (outcrossing), and thus tends to reduce the expression of recessive deleterious mutations present in a population. Plants have several other methods of preventing self-fertilization including, for example, dichogamy, herkogamy, and self-incompatibility. Dioecy is a dimorphic sexual system, alongside gynodioecy and androdioecy. In zoology In zoology, dioecious species may be opposed to hermaphroditic species, meaning that an individual is either male or female, in which case the synonym gonochory is more often used. Most animal species are dioecious (gon ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
