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Cassia (genus)
''Cassia'' is a genus of flowering plants in the legume family, Fabaceae, and the subfamily Caesalpinioideae. Species are known commonly as cassias. Cassia is also the English common name of some species in the genus ''Cinnamomum'' of the family Lauraceae. Species of the genera '' Senna'' and ''Chamaecrista'' were previously included in ''Cassia''. ''Cassia'' now generally includes the largest species of the legume subtribe Cassiinae, usually mid-sized trees. Ecology ''Cassia'' species occur in a range of climates. Some can be utilized widely as ornamental plants. They have been used in reforestation projects, and species from desert climates can be used to prevent desertification. ''Cassia'' species are used as food plants by the caterpillars of many lepidopteran taxa. For example, the skipper ''Astraptes fulgerator'' and the pierids ''Catopsilia pomona'' and '' C. pyranthe'' are all seen on ''Cassia fistula''. The latter utilizes several other cassias, as well. The plant ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Legume
A legume () is a plant in the family Fabaceae (or Leguminosae), or the fruit or seed of such a plant. When used as a dry grain, the seed is also called a pulse. Legumes are grown agriculturally, primarily for human consumption, for livestock forage and silage, and as soil-enhancing green manure. Well-known legumes include beans, soybeans, chickpeas, peanuts, lentils, lupins, mesquite, carob, tamarind, alfalfa, and clover. Legumes produce a botanically unique type of fruit – a simple dry fruit that develops from a simple carpel and usually dehisces (opens along a seam) on two sides. Legumes are notable in that most of them have symbiotic nitrogen-fixing bacteria in structures called root nodules. For that reason, they play a key role in crop rotation. Terminology The term ''pulse'', as used by the United Nations' Food and Agriculture Organization (FAO), is reserved for legume crops harvested solely for the dry seed. This excludes green beans and green peas, which a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Desertification
Desertification is a type of land degradation in drylands in which biological productivity is lost due to natural processes or induced by human activities whereby fertile areas become increasingly arid. It is the spread of arid areas caused by a variety of factors, such as climate change and overexploitation of soil as a result of human activity. Throughout geological history, the development of deserts has occurred naturally. In recent times, the potential influences of human activity, improper land management, deforestation and climate change on desertification is the subject of many scientific investigations. Definitions of words As recently as 2005, considerable controversy existed over the proper definition of the term "desertification." Helmut Geist (2005) identified more than 100 formal definitions. The most widely acceptedGeist (2005)p. 2/ref> of these was that of the Princeton University Dictionary which defined it as "the process of fertile land ''transforming into ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cassia Sieberiana MHNT
Cassia typically refers to cassia bark, the spice made from the bark of East Asian evergreen trees. Cassia may also refer to: Plants ;Cinnamon trees * ''Cinnamomum cassia'' (, ''ròuguì''), the cassia or Chinese cinnamon, found in southern China and Indochina * Other East Asian species of ''Cinnamomum'', such as ''Cinnamomum burmannii'' (Indonesian cinnamon) and ''C. loureiroi'', Saigon cinnamon ;Osmanthus * ''Osmanthus fragrans'' (, ''guìhuā''), is the osmanthus or sweet olive found in southern China and Indochina ;Beans * ''Cassia'' (genus), a genus of trees and shrubs in the bean family Fabaceae. * ''Senna'' (plant), a genus of the bean family Fabaceae including species formerly treated in the genus ''Cassia'', and used in herbal medicine: ** ''Senna obtusifolia'', the Chinese senna or sicklepod ** ''Senna artemisioides'', silver cassia or feathery cassia * ''Vachellia farnesiana'', another member of Fabaceae Food * Cassia gum, a food additive made from the seeds of ''S ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Potyviridae
''Potyviridae'' is a family of positive-strand RNA viruses that encompasses more than 30% of known plant viruses, many of which are of great agricultural significance. The family has 12 genera and 235 species, three of which are unassigned to a genus. Structure Potyvirid virions are nonenveloped, flexuous filamentous, rod-shaped particles. The diameter is around 12–15 nm, with a length of 200–300 nm. Genome Genomes are linear and usually nonsegmented, around 8–12kb in length, consisting of positive-sense RNA, which is surrounded by a protein coat made up of a single viral encoded protein called a capsid. All induce the formation of virus inclusion bodies called cylindrical inclusions (‘pinwheels’) in their hosts. These consist of a single protein (about 70 kDa) made in their hosts from a single viral genome product. Member viruses encode large polypeptides that are cleaved into mature proteins. In 5'–3' order these proteins are * P1 (a serine protease ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bromoviridae
''Bromoviridae'' is a family of viruses. Plants serve as natural hosts. There are six genera in the family. Taxonomy The following genera are assigned to the family: * ''Alfamovirus'' * ''Anulavirus'' * ''Bromovirus'' * ''Cucumovirus'' * ''Ilarvirus'' * ''Oleavirus ''Oleavirus'' is a genus of viruses, in the family ''Bromoviridae ''Bromoviridae'' is a family of viruses. Plants serve as natural hosts. There are six genera in the family. Taxonomy The following genera are assigned to the family: * ''Alfa ...'' Structure Viruses in the family ''Bromoviridae'' are non-enveloped, with icosahedral and bacilliform geometries. The diameter is around 26-35 nm. Genomes are linear and segmented, tripartite. Life cycle Viral replication is cytoplasmic, and is lysogenic. Entry into the host cell is achieved by penetration into the host cell. Replication follows the positive stranded RNA virus replication model. Positive stranded rna virus transcription, using the internal ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Virus
A virus is a submicroscopic infectious agent that replicates only inside the living cells of an organism. Viruses infect all life forms, from animals and plants to microorganisms, including bacteria and archaea. Since Dmitri Ivanovsky's 1892 article describing a non-bacterial pathogen infecting tobacco plants and the discovery of the tobacco mosaic virus by Martinus Beijerinck in 1898,Dimmock p. 4 more than 9,000 virus species have been described in detail of the millions of types of viruses in the environment. Viruses are found in almost every ecosystem on Earth and are the most numerous type of biological entity. The study of viruses is known as virology, a subspeciality of microbiology. When infected, a host cell is often forced to rapidly produce thousands of copies of the original virus. When not inside an infected cell or in the process of infecting a cell, viruses exist in the form of independent particles, or ''virions'', consisting of (i) the genetic material, i. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plant Pathogen
Plant pathology (also phytopathology) is the scientific study of diseases in plants caused by pathogens (infectious organisms) and environmental conditions (physiological factors). Organisms that cause infectious disease include fungi, oomycetes, bacteria, viruses, viroids, virus-like organisms, phytoplasmas, protozoa, nematodes and parasitic plants. Not included are ectoparasites like insects, mites, vertebrate, or other pests that affect plant health by eating plant tissues. Plant pathology also involves the study of pathogen identification, disease etiology, disease cycles, economic impact, plant disease epidemiology, plant disease resistance, how plant diseases affect humans and animals, pathosystem genetics, and management of plant diseases. Overview Control of plant diseases is crucial to the reliable production of food, and it provides significant problems in agricultural use of land, water, fuel and other inputs. Plants in both natural and cultivated populat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cassia Fistula
''Cassia fistula'', commonly known as golden shower, purging cassia, Indian laburnum, or pudding-pipe tree,U. S. Department of Agriculture, William Saunders; Catalogue of Economic Plants in the Collection of the U. S. Department of Agriculture; Washington D. C.; June 5, 1891 is a flowering plant in the family Fabaceae. The species is native to the Indian subcontinent and adjacent regions of Southeast Asia, from southern Pakistan through India and Sri Lanka to Bangladesh, Myanmar and Thailand. It is a popular ornamental plant and is also used in herbal medicine. Description The golden shower tree is a medium-sized tree, growing to tall with fast growth. The leaves are deciduous, long, and pinnate with three to eight pairs of leaflets, each leaflet long and broad. The flowers are produced in pendulous racemes long, each flower diameter with five yellow petals of equal size and shape. The fruit is a legume, long and broad, with a pungent odor and containing several seeds. Th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Catopsilia Pyranthe
''Catopsilia pyranthe'', the mottled emigrant, is a medium-sized butterfly of the family Pieridae found in south Asia, southeast Asia, and parts of Australia. Description Male The upperside is chalky white, slightly tinted in some specimens with green. The forewing is with or without a discocellular black spot, that varies in size; costa and termen sometimes without a black margin; occasionally the costa has its apical third narrowly black, broadened slightly at the apex with black spots between the anterior veins; or again, the costa may be narrowly black, the apex very broadly so, and this colour continued down the termen but narrowed posteriorly. The hindwing is sometimes immaculate, but generally with narrow terminal black spots at the apices of the veins, these often reduced to mere dots, or again so broadened as to coalesce into a narrow terminal black margin. The underside's ground colour is similar, suffused on the anterior half of the forewing and over the whole surfac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Catopsilia Pomona
''Catopsilia pomona'', the common emigrant or lemon emigrant, is a medium-sized Pieridae, pierid butterfly found in Asia, Cambodia and parts of Australia. The species gets its name from its habit of Lepidoptera migration, migration. Some early authors considered them as two distinct species ''Catopsilia crocale'' and ''Catopsilia pomona''. Description The species has pale and dark Morph (zoology), morphs in Australia. The form ''crocale'' has the antennae black and the form ''pomona'' has the antennae pinkish or red. The development of these forms has been linked to photoperiod and temperature during growth. Male Quoted from Bingham, C. T. (1907) ''The Fauna of British India, Including Ceylon and Burma: Butterflies'' volume 2. "The upperside of the male is chalky-white, sometimes with a more or less broad and clearly defined basal sulphur-yellow area on both fore and hind wings; this sulphur-yellow colour is at times diffused over the whole surface of the wings, though ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pieridae
The Pieridae are a large family of butterflies with about 76 genera containing about 1,100 species, mostly from tropical Africa and tropical Asia with some varieties in the more northern regions of North America and Eurasia.DeVries P. J. in Levin S.A. (ed) 2001 The Encyclopaedia of Biodiversity. Academic Press. Most pierid butterflies are white, yellow, or orange in coloration, often with black spots. The pigments that give the distinct coloring to these butterflies are derived from waste products in the body and are a characteristic of this family.Carter, David (2000). ''Butterflies and Moths''. The family was created by William John Swainson in 1820. The name "butterfly" is believed to have originated from a member of this family, the brimstone, ''Gonepteryx rhamni'', which was called the "butter-coloured fly" by early British naturalists. The sexes usually differ, often in the pattern or number of the black markings. The larvae (caterpillars) of a few of these species, such ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Astraptes Fulgerator
''Astraptes fulgerator'', the two-barred flasher, is a spread-wing skipper butterfly in the genus '' Astraptes'' which may constitute a possible cryptic species complex. It ranges all over the Americas, from the southern United States to northern Argentina. Description ''Astraptes fulgerator'' adults all look quite alike. They are mid-sized skipper butterflies with the typical wing shape of this group. The upperside is black, with basal to postbasal blue corners which are more extensive on the forewings. There is one discal-tomal and one apical band on the forewing; these are usually off white to light blue but the former may be quite white towards the costal margin. The thorax has bluish hair on the back, the underside is yellow to orange.Hebert ''et al.'' (2004) The caterpillars and pupae show a wide range of colors and patterns, and the caterpillars also vary in food preference. Last-instar caterpillars are black with a pattern consisting of light to bright yellow dots alo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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