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Solanum Plastisexum
'' Solanum plastisexum'' is a species of bush tomato from the Australian monsoon tropics that exhibits "breeding system fluidity" – that is, it has no stable sexual expression.McDonnell et al. (2019) After its first description in 2019, the describers suggested the common name of Dungowan bush tomato, in reference to Dungowan Station where it was collected. The species is restricted to a small area in the central region of the Northern Territory of Australia on and around the Buchanan Highway. It confounded field botanists since at least the early 1970s because it does not conform to any one floral form and/or inflorescence type. Any given plant might consist of a fully andromonoecious inflorescence, a solitary bisexual flower, a solitary short-styled flower or an extended rachis of staminate flowers. It can therefore exhibit any of three breeding systems: andromonoecy, hermaphroditism or functional dioecy. The describers commented that ''Solanum plastisexum'' is "a new specie ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bush Tomato
Bush tomatoes are the fruit or entire plants of certain nightshade (''Solanum'') species native to the more arid parts of Australia. While they are quite closely related to tomatoes (''Solanum lycopersicum''), they might be even closer relatives of the eggplant (''S. melongena''), which they resemble in many details. There are 94 (mostly perennial) natives and 31 (mostly annual) introduced species in Australia.Moore, Philip ''A Guide to Plants of Inland Australia'' (2005), Reed New Holland, Sydney, Bush tomato plants are small shrubs whose growth is encouraged by fire and disturbance. The fruit of a number of species have been used as food sources by Aboriginal people in the drier areas of Australia. A number of ''Solanum'' species contain significant levels of solanine and as such are highly poisonous. It is strongly recommended that people unfamiliar with the plant do not experiment with the different species, as differentiating between them can often be difficult. S ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dungowan Station
Dungowan Station is a pastoral lease that operates as a cattle station in the Northern Territory The Northern Territory (commonly abbreviated as NT; formally the Northern Territory of Australia) is an states and territories of Australia, Australian territory in the central and central northern regions of Australia. The Northern Territory ... of Australia, approximately south of Darwin. The property occupies an area of and is currently owned by the Consolidated Pastoral Company. The station is run in conjunction with Newcastle Waters Station which is located away. Over 13,000 head of cattle graze the property with approximately 5,000 claves being branded each year. It was owned in the 1980s by The Hon Charles Sweeney QC, an Australian pastoralist and later Chief Justice of Tuvalu, a major interest of whom was water security. He was a relative of Michael and Paul Vandeleur who owned Mataranka Station. Approximately of pastoral country was burnt out by a fire th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Northern Territory
The Northern Territory (commonly abbreviated as NT; formally the Northern Territory of Australia) is an states and territories of Australia, Australian territory in the central and central northern regions of Australia. The Northern Territory shares its borders with Western Australia to the west (129th meridian east), South Australia to the south (26th parallel south), and Queensland to the east (138th meridian east). To the north, the territory looks out to the Timor Sea, the Arafura Sea and the Gulf of Carpentaria, including Western New Guinea and other islands of the Indonesian archipelago. The NT covers , making it the third-largest Australian federal division, and List of country subdivisions by area, the 11th-largest country subdivision in the world. It is sparsely populated, with a population of only 249,000 – fewer than half as many people as in Tasmania. The largest population center is the capital city of Darwin, Northern Territory, Darwin. The archaeological hist ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Buchanan Highway
The Buchanan Highway, Northern Territory, Australia, runs west from Birdum on the Stuart Highway crossing the Buntine Highway at Top Springs and eventually connecting with the Victoria Highway near Timber Creek. it was unsealed for its entire length, at . Funding for maintenance is provided by the Northern Territory Government. The highway was named in 1966 after Nathaniel Buchanan, a pioneering drover who first brought cattle overland from Queensland to the Northern Territory in 1877. The highway originally ran from the Stuart Highway west to Top Springs, then Wave Hill and then to the southern end of the Duncan Road which is in Western Australia. In 1996 the portion from Top Springs to Duncan Road was renamed the Buntine Highway, while the road from Top Springs which joins the Victoria Highway near Timber Creek was renamed as the Buchanan Highway. Major intersections The only major intersection on this road is with the Buntine Highway (National Route 96) at Top Spr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Inflorescence
An inflorescence is a group or cluster of flowers arranged on a stem that is composed of a main branch or a complicated arrangement of branches. Morphologically, it is the modified part of the shoot of seed plants where flowers are formed on the axis of a plant. The modifications can involve the length and the nature of the internodes and the phyllotaxis, as well as variations in the proportions, compressions, swellings, adnations, connations and reduction of main and secondary axes. One can also define an inflorescence as the reproductive portion of a plant that bears a cluster of flowers in a specific pattern. The stem holding the whole inflorescence is called a peduncle. The major axis (incorrectly referred to as the main stem) above the peduncle bearing the flowers or secondary branches is called the rachis. The stalk of each flower in the inflorescence is called a pedicel. A flower that is not part of an inflorescence is called a solitary flower and its stalk is al ... [...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] |
Rachis
In biology, a rachis (from the grc, ῥάχις [], "backbone, spine") is a main axis or "shaft". In zoology and microbiology In vertebrates, ''rachis'' can refer to the series of articulated vertebrae, which encase the spinal cord. In this case the ''rachis'' usually forms the supporting axis of the body and is then called the spine or vertebral column. ''Rachis'' can also mean the central shaft of pennaceous feathers. In the gonad of the invertebrate nematode '' Caenorhabditis elegans'', a rachis is the central cell-free core or axis of the gonadal arm of both adult males and hermaphrodites where the germ cells have achieved pachytene and are attached to the walls of the gonadal tube. The rachis is filled with cytoplasm. In botany In plants, a rachis is the main axis of a compound structure. It can be the main stem of a compound leaf, such as in ''Acacia'' or ferns, or the main, flower-bearing portion of an inflorescence above a supporting peduncle. Where it subdivides ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hermaphroditism
In reproductive biology, a hermaphrodite () is an organism that has both kinds of reproductive organs and can produce both gametes associated with male and female sexes. Many taxonomic groups of animals (mostly invertebrates) do not have separate sexes. In these groups, hermaphroditism is a normal condition, enabling a form of sexual reproduction in which either partner can act as the female or male. For example, the great majority of tunicates, pulmonate molluscs, opisthobranch, earthworms, and slugs are hermaphrodites. Hermaphroditism is also found in some fish species and to a lesser degree in other vertebrates. Most plants are also hermaphrodites. Animal species having different sexes, male and female, are called gonochoric, which is the opposite of hermaphrodite. There are also species where hermaphrodites exist alongside males (called androdioecy) or alongside females (called gynodioecy), or all three exist in the same species (called trioecy); these three systems are so ... [...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] |
Sexual Binary
The gender binary (also known as gender binarism) is the classification of gender into two distinct, opposite forms of masculine and feminine, whether by social system, cultural belief, or both simultaneously. Most cultures use a gender binary, having two genders ( boys/ men and girls/ women).Kevin L. Nadal, ''The SAGE Encyclopedia of Psychology and Gender'' (2017, ), page 401: "Most cultures currently construct their societies based on the understanding of gender binary—the two gender categorizations (male and female). Such societies divide their population based on biological sex assigned to individuals at birth to begin the process of gender socialization." In this binary model, '' gender'' and ''sexuality'' may be assumed by default to align with one's genetic or gamete-based sex, i.e. one's sex assigned at birth. This may include certain expectations of how one dresses themselves, their behavior, sexual orientation, names or pronouns, which restroom they use, and o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
PhytoKeys
''PhytoKeys'' is a peer-reviewed, open-access online and print botanical journal. Its stated goal is "to support free exchange of ideas and information in systematic botany". Printed issues of the journal are available in the libraries of the United States (Smithsonian Institution, Missouri Botanical Garden), United Kingdom (Natural History Museum, London, Royal Botanic Gardens, Kew), Russia (Komarov Botanical Institute, St. Petersburg) and China (Kunming Institute of Botany, Kunming). Important Articles *Feb, 2015: The discovery of ''Thismia hongkongensis''. *Apr, 2022: The rediscovery of Gasteranthus extinctus ''Gasteranthus extinctus'' is a species of flowering plant in the family Gesneriaceae. It is endemic to Ecuador. Its natural habitat is subtropical or tropical moist montane forests. The species is a small herb that produces bright orange flower .... References External links All ''PhytoKeys'' issues Botany journals Open access journals Pensoft Publishers academic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Creative Commons Attribution License
A Creative Commons (CC) license is one of several public copyright licenses that enable the free distribution of an otherwise copyrighted "work".A "work" is any creative material made by a person. A painting, a graphic, a book, a song/lyrics to a song, or a photograph of almost anything are all examples of "works". A CC license is used when an author wants to give other people the right to share, use, and build upon a work that the author has created. CC provides an author flexibility (for example, they might choose to allow only non-commercial uses of a given work) and protects the people who use or redistribute an author's work from concerns of copyright infringement as long as they abide by the conditions that are specified in the license by which the author distributes the work. There are several types of Creative Commons licenses. Each license differs by several combinations that condition the terms of distribution. They were initially released on December 16, 2002, by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
