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Curvularia Geniculata
''Curvularia geniculata'' is a fast-growing anamorphic fungus in the division Ascomycota, most commonly found in soil, especially in areas of warmer climates. The fungus is a pathogen, mainly causing plant and animal infections, and rarely causing human infections. ''C. geniculata'' is characterized by its curved conidia, which has a dark brown centre and pale tapered tips, and produces anti-fungal compounds called Curvularides A-E. History and taxonomy The fungus was discovered by American botanist Samuel Mills Tracy and mycologist Franklin Sumner Earle in Starkville, Mississippi 1894 on Love grass (''Eragrostis rachitricha'') grown from imported seeds. They classified the fungus as ''Helminthosporium geniculatum''; however, the ''Heliminthosporium'' species later got segregated into four different genera, one being the genus ''Curvularia''. In 1923, Karel Bernard Boedijn, a Dutch botanist and mycologist, reclassified the fungus as ''Curvularia geniculata'' which is the asexual ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Samuel Mills Tracy
Samuel Mills Tracy (1847–1920) was an American botanist. Biography Samuel Tracy was born in 1847 in Hartford, Vermont. He lived in Illinois with his parents, and later moved to Wisconsin. When the Civil War broke out, he enlisted with the Union Army, serving a hundred days with a branch of the Wisconsin Volunteers. When he returned from his service, he started farming. In 1868 he received a Bachelor's degree, followed by a Master's three years later from Michigan State Agricultural College. Starting from 1871 to 1877 he worked in horticulture. Later in 1877 he was taken on at the University of Missouri as Professor of Botany. Ten years later, he became first Director of the Mississippi Experiment Station. Tracy is well known for his work in the taxonomy of various grasses, plant breeds, and for adapting numerous forage plants to the biomes of the Southern United States. He is perhaps best known for his work, ''Flora of Missouri'', which was published in 1886. Selected works T ... [...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] |
Appressorium
An appressorium is a specialized cell typical of many fungal plant pathogens that is used to infect host plants. It is a flattened, hyphal "pressing" organ, from which a minute infection peg grows and enters the host, using turgor pressure capable of punching through even Mylar. Following spore attachment and germination on the host surface, the emerging germ tube perceives physical cues such as surface hardness and hydrophobicity, as well as chemical signals including wax monomers that trigger appressorium formation. Appressorium formation begins when the tip of the germ tube ceases polar growth, hooks, and begins to swell. The contents of the spore are then mobilized into the developing appressorium, a septum develops at the neck of the appressorium, and the germ tube and spore collapse and die. As the appressorium matures, it becomes firmly attached to the plant surface and a dense layer of melanin is laid down in the appressorium wall, except across a pore at the plant interface ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Striga
''Striga'', commonly known as witchweed, is a genus of parasitic plants that occur naturally in parts of Africa, Asia, and Australia. It is currently classified in the family Orobanchaceae, although older classifications place it in the Scrophulariaceae. Some species are serious pathogens of cereal crops, with the greatest effects being in savanna agriculture in Africa. It also causes considerable crop losses in other regions, including other tropical and subtropical crops in its native range and in the Americas. The generic name derives from Latin ''strī̆ga'', "witch." Witchweeds are characterized by bright-green stems and leaves and small, brightly colored and attractive flowers.Sand, Paul, Robert Eplee, and Randy Westbrooks. Witchweed Research and Control in the United States. Champaign, IL: Weed Science Society of America, 1990. They are obligate hemiparasites of roots and require a living host for germination and initial development, though they can then survive on thei ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Candida Albicans
''Candida albicans'' is an opportunistic pathogenic yeast that is a common member of the human gut flora. It can also survive outside the human body. It is detected in the gastrointestinal tract and mouth in 40–60% of healthy adults. It is usually a commensal organism, but it can become pathogenic in immunocompromised individuals under a variety of conditions. It is one of the few species of the genus '' Candida'' that causes the human infection candidiasis, which results from an overgrowth of the fungus. Candidiasis is, for example, often observed in HIV-infected patients. ''C. albicans'' is the most common fungal species isolated from biofilms either formed on (permanent) implanted medical devices or on human tissue. ''C. albicans'', ''C. tropicalis'', ''C. parapsilosis'', and ''C. glabrata'' are together responsible for 50–90% of all cases of candidiasis in humans. A mortality rate of 40% has been reported for patients with systemic candidiasis due to ''C. albicans''. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zingiberaceae
Zingiberaceae () or the ginger family is a family of flowering plants made up of about 50 genera with a total of about 1600 known species of aromatic perennial herbs with creeping horizontal or tuberous rhizomes distributed throughout tropical Africa, Asia, and the Americas. Many of the family's species are important ornamental, spice, or medicinal plants. Ornamental genera include the shell gingers ('' Alpinia''), Siam or summer tulip ('' Curcuma alismatifolia''), '' Globba'', ginger lily ('' Hedychium''), '' Kaempferia'', torch-ginger '' Etlingera elatior'', ''Renealmia'', and ginger (''Zingiber''). Spices include ginger (''Zingiber''), galangal or Thai ginger ('' Alpinia galanga'' and others), melegueta pepper (''Aframomum melegueta''), myoga (''Zingiber mioga''), korarima (''Aframomum corrorima''), turmeric (''Curcuma''), and cardamom ('' Amomum'', '' Elettaria''). Description Members of the family are small to large herbaceous plants with distichous leaves with basal she ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vitaceae
The Vitaceae are a family of flowering plants, with 14 genera and around 910 known species, including common plants such as grapevines (''Vitis'' spp.) and Virginia creeper (''Parthenocissus quinquefolia''). The family name is derived from the genus ''Vitis''. Most ''Vitis'' species have 38 chromosomes (n=19), but 40 (n=20) in subgenus ''Muscadinia'', while ''Ampelocissus'', ''Parthenocissus'', and '' Ampelopsis'' also have 40 chromosomes (n=20) and ''Cissus'' has 24 chromosomes (n=12). The family is economically important as the berries of ''Vitis'' species, commonly known as grapes, are an important fruit crop and, when fermented, produce wine. Species of the genus ''Tetrastigma'' serve as hosts to parasitic plants in the family Rafflesiaceae. Taxonomy The name sometimes appears as Vitidaceae, but Vitaceae is a conserved name and therefore has priority over both Vitidaceae and another name sometimes found in the older literature, Ampelidaceae. In the APG III system (2009) onw ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Solanaceae
The Solanaceae (), or the nightshades, are a family (biology), family of flowering plants that ranges from annual plant, annual and perennial herbs to vines, lianas, epiphytes, shrubs, and trees, and includes a number of agricultural crops, medicinal plants, spices, weeds, and ornamentals. Many members of the family contain potent alkaloids, and some are highly toxin, toxic, but many—including tomatoes, potatoes, eggplant, bell pepper, bell and chili peppers—are used as Food#Planta, food. The family belongs to the order Solanales, in the Asterids, asterid group and class Magnoliopsida (dicotyledons). The Solanaceae consists of about 98 genera and some 2,700 species, with a great diversity of habitats, Morphology (biology), morphology and ecology. The name Solanaceae derives from the genus ''Solanum''. The etymology of the Latin word is unclear. The name may come from a perceived resemblance of certain solanaceous flowers to the sun and its rays. At least one species of ''Sol ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Poaceae
Poaceae () or Gramineae () is a large and nearly ubiquitous family of monocotyledonous flowering plants commonly known as grasses. It includes the cereal grasses, bamboos and the grasses of natural grassland and species cultivated in lawns and pasture. The latter are commonly referred to collectively as grass. With around 780 genera and around 12,000 species, the Poaceae is the fifth-largest plant family, following the Asteraceae, Orchidaceae, Fabaceae and Rubiaceae. The Poaceae are the most economically important plant family, providing staple foods from domesticated cereal crops such as maize, wheat, rice, barley, and millet as well as feed for meat-producing animals. They provide, through direct human consumption, just over one-half (51%) of all dietary energy; rice provides 20%, wheat supplies 20%, maize (corn) 5.5%, and other grains 6%. Some members of the Poaceae are used as building materials (bamboo, thatch, and straw); others can provide a source of biofuel, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Papaveraceae
The Papaveraceae are an economically important family of about 42 genera and approximately 775 known species of flowering plants in the order Ranunculales, informally known as the poppy family. The family is cosmopolitan, occurring in temperate and subtropical climates (mostly in the northern hemisphere), but almost unknown in the tropics. Most are herbaceous plants, but a few are shrubs and small trees. The family currently includes two groups that have been considered to be separate families: Fumariaceae and Pteridophyllaceae. Description The plants may be annual, biennial, or perennial. Usually herbaceous, a few species form shrubs or evergreen trees. They are lactiferous, producing latex, which may be milky or watery, coloured or plain. All parts contain a well-developed duct system (these ducts are called "laticifers"), producing a milky latex, a watery white, yellow or red juice. The simple leaves are alternate or sometimes whorled. They have petioles and are not enc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oleaceae
Oleaceae, also known as the olive family, is a taxonomic family of flowering shrubs, trees, and a few lianas in the order Lamiales, It presently comprises 28 genera, one of which is recently extinct.Peter S. Green. 2004. "Oleaceae". pages 296-306. In: Klaus Kubitzki (editor) and Joachim W. Kadereit (volume editor). ''The Families and Genera of Vascular Plants'' volume VII. Springer-Verlag: Berlin; Heidelberg, Germany. The extant genera include ''Cartrema'', which was resurrected in 2012. The number of species in the Oleaceae is variously estimated in a wide range around 700. The flowers are often numerous and highly odoriferous.Vernon H. Heywood, Richard K. Brummitt, Ole Seberg, and Alastair Culham. ''Flowering Plant Families of the World''. Firefly Books: Ontario, Canada. . The family has a subcosmopolitan distribution, ranging from the subarctic to the southernmost parts of Africa, Australia, and South America. Notable members include olive, ash, jasmine, and several popular or ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Marantaceae
The Marantaceae are a family, the arrowroot family, of flowering plants consisting of 31 genera and around 530 species, defining it as one of the most species-rich families in its order.Kennedy, H. (2000). “Diversification in pollination mechanisms in the Marantaceae”. Pp. 335-343 in Monocots: systematics and evolution, eds. K. L. Wilson and D. A. Morrison. Melbourne: CSIROLey, A. C., and Claßen-Bockhoff, R. (2011). “Evolution in African Marantaceae - evidence from phylogenetic, ecological and morphological studies”. Syst. Bot. 36, 277–290. doi: 10.1600/036364411X569480 Species of this family are found in lowland tropical forests of Africa, Asia, and the Americas. The majority (80%) of the species are found in the American tropics, followed by Asian (11%) and African (9%) tropics. They are commonly called the prayer-plant family and are also known for their unique secondary pollination presentation. Description The plants usually have underground rhizomes or tubers. The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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