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Longodorids
Longidoridae (longidorid nematodes) is a family of polyphagous root ectoparasites in the phylum Nematoda (nematodes) with a worldwide distribution. Taxonomy There are about 720 species divided amongst seven genera in the family, which is further subdivided into subfamilies and tribes. Subdivision Subfamilies; * Longidorinae (480 spp.) * Xiphineminae (240 spp.) Tribes; *Subfamily Longidorinae ** Longidorini ** Xiphidorini *Subfamily Xiphineminae Genera *Subfamily Longidorinae **Tribe Longidorini ***'' Longidorus'' (144 spp.) ***'' Longidoroides'' (13 spp.) ***'' Paralongidorus'' (72 spp.) **Tribe Xiphidorini ***'' Australodorus'' (1 sp.) ***'' Paraxiphidorus'' (3 spp.) ***'' Xiphidorus'' (8 spp.) *Subfamily Xiphineminae ***''Xiphinema'' (some 240 spp.) Pathology With the Trichodoridae, the Longidoridae form the two Enoplea nematode families known to be plant parasites, though from different subclasses, and the only virus vectors (particularly nepoviruses '' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polyphagous
Feeding is the process by which organisms, typically animals, obtain food. Terminology often uses either the suffixes -vore, -vory, or -vorous from Latin ''vorare'', meaning "to devour", or -phage, -phagy, or -phagous from Greek φαγεῖν (), meaning "to eat". Evolutionary history The evolution of feeding is varied with some feeding strategies evolving several times in independent lineages. In terrestrial vertebrates, the earliest forms were large amphibious piscivores 400 million years ago. While amphibians continued to feed on fish and later insects, reptiles began exploring two new food types, other tetrapods (carnivory), and later, plants (herbivory). Carnivory was a natural transition from insectivory for medium and large tetrapods, requiring minimal adaptation (in contrast, a complex set of adaptations was necessary for feeding on highly fibrous plant materials). Evolutionary adaptations The specialization of organisms towards specific food sources is one of t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nepoviruses
''Nepovirus'' is a genus of viruses in the order ''Picornavirales'', in the family ''Secoviridae'', in the subfamily ''Comovirinae''. Plants serve as natural hosts. There are 40 species in this genus. Nepoviruses, unlike the other two genera (''Comovirus'' and ''Fabavirus'') in the subfamily ''Comovirinae'', are transmitted by nematodes. Taxonomy The genus contains the following species: *'' Aeonium ringspot virus'' *'' Apricot latent ringspot virus'' *'' Arabis mosaic virus'' *'' Arracacha virus A'' *'' Artichoke Aegean ringspot virus'' *'' Artichoke Italian latent virus'' *'' Artichoke yellow ringspot virus'' *'' Beet ringspot virus'' *'' Blackcurrant reversion virus'' *'' Blueberry latent spherical virus'' *'' Blueberry leaf mottle virus'' *'' Cassava American latent virus'' *'' Cassava green mottle virus'' *'' Cherry leaf roll virus'' *'' Chicory yellow mottle virus'' *'' Cocoa necrosis virus'' *'' Crimson clover latent virus'' *'' Cycas necrotic stunt virus'' *'' Grapevin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vector (epidemiology)
In epidemiology, a disease vector is any living agent that carries and transmits an infectious pathogen to another living organism; agents regarded as vectors are organisms, such as parasites or microbes. The first major discovery of a disease vector came from Ronald Ross in 1897, who discovered the malaria pathogen when he dissected a mosquito. Arthropods Arthropods form a major group of pathogen vectors with mosquitoes, flies, sand flies, lice, fleas, ticks, and mites transmitting a huge number of pathogens. Many such vectors are haematophagous, which feed on blood at some or all stages of their lives. When the insects feed on blood, the pathogen enters the blood stream of the host. This can happen in different ways. The ''Anopheles'' mosquito, a vector for malaria, filariasis, and various arthropod-borne-viruses (arboviruses), inserts its delicate mouthpart under the skin and feeds on its host's blood. The parasites the mosquito carries are usually located in its salivary gla ... [...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] |
Enoplea
Enoplea (enopleans) is a class, which with the classes SecernenteaTree of Life Web Project (ToL) (2002)Nematoda Version of January 1, 2002. Retrieved November 2, 2008. and Chromadorea make up the phylum Nematoda in current taxonomy. The Enoplea are considered to be a more ancestral group than the Chromadorea, and researchers have referred to its members as the "ancestrally diverged nematodes", compared to the "more recently diverged nematodes" of Chromadorea. Description The Enoplea are distinguished from the Chromadorea by a number of characteristics. The enoplean esophagus is cylindrical or "bottle-shaped", compared to the bulbous chromadorean esophagus. Enopleans have pocket-like amphids, while chromadoreans have amphids shaped like slits, pores, coils, or spirals. An enoplean is smooth or marked with fine lines, while a chromadorean may have rings, projections, or setae. The enoplean excretory system is simple, sometimes made up of a single cell, while chromadoreans have more ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trichodoridae
Trichodoridae (stubby-root nematodes, trichodorids) is a family of terrestrial root feeding nematodes, being one of two that constitute suborder Triplonchida.Phylum Nematoda: Triplochida Nematode Classification. Department of Nematology. University of California, Riverside. Nemaplex: Nematode-Plant Expert Information System. University of California, Davis. Version October 9, 2012. They are economically important plant parasites and virus vectors. Taxonomy The first trichodorid was described in 1880 (De Man) as ''Dorylaimus primitivus'', and the type genus, ''Trichodorus'' described in 1913 by Cobb, based on '' |
Xiphinema
''Xiphinema'' is a genus of ectoparasitic root nematodes commonly known as dagger nematodes.Whitehead, A.G. 1998. Plant Nematode Control The genus is of economic importance on grape, strawberry, hops and a few other crops. Major species include ''X.americanum, X.diversicaudatum, X.index, X.italiae'' and ''X.pachtaicum''.Evans, K., Trudgill, D.L., Webster, J.M. 1998. Plant Parasitic Nematodes in Temperate Agriculture. They can be easily recognized by their long bodies and stylets which are long enough to reach the vascular tissue of plants.''Xiphinema'' at Nemaplex, Different members of the genus have been shown to i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paralongidorus
''Paralongidorus'' is a genus of nematode The nematodes ( or grc-gre, Νηματώδη; la, Nematoda) or roundworms constitute the phylum Nematoda (also called Nemathelminthes), with plant-Parasitism, parasitic nematodes also known as eelworms. They are a diverse animal phylum inhab ...s. References Enoplea genera Longidoridae {{Enoplea-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ectoparasites
Parasitism is a close relationship between species, where one organism, the parasite, lives on or inside another organism, the host, causing it some harm, and is adapted structurally to this way of life. The entomologist E. O. Wilson has characterised parasites as "predators that eat prey in units of less than one". Parasites include single-celled protozoans such as the agents of malaria, sleeping sickness, and amoebic dysentery; animals such as hookworms, lice, mosquitoes, and vampire bats; fungi such as honey fungus and the agents of ringworm; and plants such as mistletoe, dodder, and the broomrapes. There are six major parasitic strategies of exploitation of animal hosts, namely parasitic castration, directly transmitted parasitism (by contact), trophicallytransmitted parasitism (by being eaten), vector-transmitted parasitism, parasitoidism, and micropredation. One major axis of classification concerns invasiveness: an endoparasite lives inside the host's body; a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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