bacteria Rhizobia are soil bacteria that Nitrogen fixation fix nitrogen diazotrophs after becoming established inside root nodule s of legumes Fabaceae . Rhizobia require a plant Host biology host ... , non sporogenesis sporulating rods. History The first species of rhizobia, Rhizobium leguminosarum ... American legumes. The word rhizobia comes from the Ancient Greek Polytonic wikt , rh za , meaning ... used as the singular form of rhizobia Taxonomy Rhizobia are a paraphyletic group that fall into two ..., most belong to the order Rhizobiales , but several rhizobia occur in distinct bacterial orders of the proteobacteria. ref name The current taxonomy of rhizobia cite web url http www.rhizobia.co.nz taxonomy rhizobia.html accessdate 2006 08 07 title Current taxonomy of rhizobia ref ref cite web ... nodule bacteria rhizobia and agrobacteria ref valign top Proteobacteria Alphaproteobacteria proteobacteria .... ref cite web url http www.bionewsonline.com y what is rhizobia.htm title What is Rhizobia accessdate ... Fertilizer Risks of fertilizer use environmental concerns . Symbiosis Rhizobia are unique because ... between both partners that leads to mutual recognition and development of symbiotic structures. Rhizobia .... The best known infection mechanism is called intracellular infection, in this case the rhizobia enter ... Infection threads grow to the nodule, infect its central tissue and release the rhizobia in these cells ... symbiosis is a classic example of Mutualism biology mutualism &mdash rhizobia supply ammonia or amino ... hypothesis suggests the plants police cheating rhizobia. Sanctions could take the form of reduced ... cooperation by rhizobia. American Naturalist 156 567 576 ref The partner choice hypothesis proposes that the plant uses prenodulation signals from the rhizobia to decide whether to allow nodulation, and chooses only noncheating rhizobia. There is evidence for sanctions in soybean plants, which ... less beneficial rhizobia, limiting rhizobial reproduction inside. This is consistent with the definition ... more details
Bacteroid may refer to Bacteroides , a genus of Gram negative, rod shaped bacteria. A symbiotic form of the nitrogen fixing bacteria, Rhizobia . disambig ... more details
Taxobox color lightgrey name Xanthobacteraceae regnum Bacterium Bacteria phylum Proteobacteria classis Alphaproteobacteria ordo Rhizobiales familia Xanthobacteraceae familia authority Lee et al . 2005 subdivision ranks Genera ref cite web url http www.bacterio.cict.fr classifgenerafamilies.html Xanthobacteraceae title List of Prokaryotic Names with Standing in Nomenclature accessdate 20 July 2010 ref subdivision Ancylobacter br Azorhizobium br Labrys bacterium Labrys br Pseudolabrys br Pseudoxanthobacter br Starkeya br Xanthobacter The Xanthobacteraceae are a family of bacterium bacteria . Among others, they include Azorhizobium , a genus of rhizobia . References Reflist Category Rhizobiales Proteobacteria stub ... more details
Refimprove type bacteria date December 2009 Taxobox color lightgrey name Phyllobacteriaceae regnum Bacterium Bacteria phylum Proteobacteria classis Alphaproteobacteria ordo Rhizobiales familia Phyllobacteriaceae familia authority Mergaert and Swings 2006 subdivision ranks Genera ref cite web url http www.bacterio.cict.fr classifgenerafamilies.html Phyllobacteriaceae title List of Prokaryotic Names with Standing in Nomenclature accessdate 20 July 2010 ref subdivision Aminobacter br Aquamicrobium br Chelativorans br Defluvibacter br Hoeflea br Mesorhizobium br Nitratireductor br Phyllobacterium br Pseudaminobacter The Phyllobacteriaceae are a family of bacterium bacteria that contain nine genera. The most common of these is Mesorhizobium which contains some of the rhizobia species. References Reflist Use dmy dates date February 2011 Category Rhizobiales Category Article Feedback 5 Proteobacteria stub es Phyllobacteriaceae ... more details
YEM may refer to Yemen , the country in Southwest Asia Manitowaning Manitoulin East Municipal Airport , the IATA airport code You Enjoy Myself , a song by the jam band Phish Yamashita Engineering Manufacture Inc. Yeast Extract Mannitol European Movement Young European Movement Yem may refer to Y m , an ancient Vietnamese bodice worn by women Chinese Surname of Cantonese origin, meaning Bold, Stern, Star Old name for Finns in Medieval Russia n chronicles. From the mid 13th century onwards, it usually referred specifically to Tavastia historical province Tavastians people from H me The Yem people , an ethnic group of southern Ethiopia The Yem Special Woreda , a region in southern Ethiopia named after the Yem people YEM may refer to Yeast extract mannitol YEM broth, a widely used laboratory medium for the cultivation of rhizobia disambig de Yem ja YEM ... more details
Orphan date February 2009 Rhizodermis is the root epidermis botany epidermis also referred to as epiblem , the outermost primary Cell biology cell layer of the root. Specialized rhisodermal cells, trichoblast s, form long tubular structures from 5 to 17 micrometers in diameter and from 80 micrometers to 1.5 millimeters in length almost perpendicular to the main cell axis Trichome Root hairs root hairs that absorb water and nutrients. Root hairs of the rhizodermis are always in close contact with soil particles and because of their high surface to volume ratio form an absorbing surface which is much larger than the transpiring surfaces of the plant. With some species of the Fabaceae family the rhisodermis participates in the recognition and uptake of nitrogen fixing Rhizobia bacteria the first stage of nodulation leading to formation of root nodule s. biosci stub Category Plant morphology de Rhizodermis es Rizodermis eo Rizodermo pl Ryzoderma ru sr uk ... more details
rhizobia , they have the ability to fix atmospheric nitrogen into forms readily available for other ... growing rhizobia. In a liquid media broth, it takes Bradyrhizobium species 3 5 days to create a moderate ... for rhizobia methods in legume rhizobium technology place New York publisher Springer Verlag pages ... . The rhizobia move toward the roots and attach to the root hairs. The plant then releases flavanoids .... During this process, the rhizobia are curled up with the root hair. The rhizobia penetrate the root ... the infected cells to divide and form a nodule. The rhizobia can now begin nitrogen fixation ... and other rhizobia take atmospheric nitrogen and fix it into ammonia NH sub 3 sub or ammonium ... first discovered in rhizobia species. The nif and fix genes are found in at least two different ... title Sampling effects on the assessment of genetic diversity of rhizobia associated ... more details
Taxobox color lightgrey image Agrobacterium tumefaciens.gif image caption Agrobacterium tumefaciens as they begin to infect a carrot cell. name Rhizobiaceae regnum Bacterium Bacteria phylum Proteobacteria classis Alphaproteobacteria Alpha Proteobacteria ordo Rhizobiales familia Rhizobiaceae familia authority Conn 1938 type genus Rhizobium subdivision ranks Genera ref http www.bacterio.cict.fr classifgenerafamilies.html Rhizobiaceae List of Prokaryotic names with Standing in Nomenclature ref subdivision Agrobacterium br Carbophilus br Chelatobacter br Kaistia br Rhizobium genus Rhizobium br Ensifer genus Ensifer Sinorhizobium synonymous br Candidatus Liberibacter The Rhizobiaceae are a family of proteobacteria , including many but not all species of rhizobia as well as plant parasites like Agrobacterium . Rhizobiaceae are, like all Proteobacteria, gram negative . They are aerobic and the cells are usually rod shaped. ref name Bergey Garrity, George M. Brenner, Don J. Krieg, Noel R. Staley, James T. eds. 2005 . Bergey s Manual of Systematic Bacteriology, Volume Two The Proteobacteria, Part C The Alpha , Beta , Delta , and Epsilonproteobacteria. New York, New York Springer. ISBN 978 0 387 24145 6. ref Many species of the Rhizobiaceae are diazotrophs , they are able to Nitrogen fixation fix nitrogen and are symbiosis symbiotic with plant roots. References Reflist Category Rhizobiales Proteobacteria stub de Rhizobiaceae es Rhizobiaceae fr Rhizobiaceae it Rhizobiaceae ... more details
Dead link date October 2010 bot H3llBot ref ref name rhizobia cite web url http www.rhizobia.co.nz taxonomy ... species a few centimetres high. ref name rhizobia Mature plants are usually leafless, with stipule ... Carmichael , a Scottish army officer and botanist who studied New Zealand plants. ref name rhizobia ... of New Zealand Rhizobia pages publisher date 2006 doi url http hdl.handle.net 2292 394 format accessdate ... more details
Dugald Carmichael 1772 1827 was a Scottish people Scottish botanist and officer in the 72nd Highlanders . He is known as the Father of Marine Botany . The plant genus Carmichaelia is named after him. ref cite web last NZ Rhizobia title Taxonomy of New Zealand Native Legumes url http www.rhizobia.co.nz taxonomy legume.html accessdate 28 March 2011 ref He was a friend of Sir William Hooker botanist William Hooker . References Reflist Persondata Metadata see Wikipedia Persondata . NAME Carmichael, Dugald ALTERNATIVE NAMES SHORT DESCRIPTION Scottish botanists DATE OF BIRTH 1772 PLACE OF BIRTH DATE OF DEATH 1827 PLACE OF DEATH DEFAULTSORT Carmichael, Dugald Category 1772 births Category 1827 deaths Category Scottish botanists Category Scottish marine biologists Category Scottish soldiers Category 72nd Highlanders officers Category 18th century Scottish people Category 18th century botanists Category 19th century Scottish people Category 19th century botanists Category Marine botany Scotland scientist stub UK botanist stub es Dugald Carmichael fr Dugald Carmichael ... more details
primarysources date February 2009 Orphan date February 2009 Robert Brooke Mellor b 1955, Huddersfield is a British biologist, known for his unified vacuole theory which states that in endosymbiosis endosymbioses generally, the micro symbiont and the macro symbiont share their lytic Vacuole vacuolar compartments. This stems from his earlier symbiosome or lysosome theory which states that the organelle that microsymbionts inhabit partially takes over the lysosomal functions in these cells, analogous to the role of protein bodies in seeds. In other works Mellor has claimed that in legume s the root nodule cytoplasm may be under water stress and the plant may combat this by producing trehalose . Indeed this may explain why nodulated plants have a higher drought tolerance than non nodulated plants. Mellor was also very interested in how plants distinguish between symbiotic and pathogenic infections and in 1984 set about measuring defence responses in nodules infected with different Rhizobia l mutants and it gradually appeared that in Rhizobia the nod genes are responsible for producing different nod factor s lipo chitin molecules and that amongst their many effects was that they can provoke plant defence responses, so that it was essential that these genes were switched off by molecules called nodoffs after infection, or that symbiosis could not take place. This convincing model won general acclaim and indeed the paper with David Collinge was later reprinted as that year s number one most important publication. Fact date February 2009 However Mellor was also interested in applied science and invented and a patented system to power immobilized oxido reductase enzymes and artificial co factors using Electric power electrical power out of a domestic socket. ref http www.nature.com nature journal v355 n6362 abs 355717a0.html Nature ref Present Work In early 2000 he joined and helped Startup company start up the IT University of Copenhagen http www.itu.dk , after which he bec ... more details
in northwestern China. Int J Syst Evol Microbiol . ref Other rhizobia in this species include Shinella ..., L., et al. 2008 . Genetic diversity in rhizobia isolated from Sphaerophysa salsula in several regions ... more details
wiktionary nod NOD , Nod, or nod may refer to Nod gesture , a head gesture Nod, a fictional character from the poem Wynken, Blynken, and Nod Nod factor nodulation factor , signaling molecules produced by rhizobia during the initiation of nodules on the root of legumes Nation of Domination , a former stable in the World Wrestling Federation Network of Disclosure , a group of comic book dealers and collectors who have pledged to disclose any form of restoration or enhancement on a comic book transferred to another party through sale, trade or gift Night observation device or night vision device Night of Decadence , a campus party at Rice University in Houston, Texas, USA NOD mice non obese diabetic mice , a strain of mice genetically prone to develop diabetes NOD1 and NOD2 , the nucleotide binding oligomerization domain containing proteins, components of the innate immune system NOD32, a software antivirus application from ESET software Notice of default , a notice given to a borrower regarding failure to pay debt Brotherhood of Nod , a fictional military organization in the Command & Conquer computer game series Nintendo optical disc , a type of media used by the Nintendo GameCube and Wii Nod, the original name of former Atlanta based power pop band Raves band Raves See also Nods disambiguation Land of Nod disambig eo NOD fr Nod it NOD ru NOD sv Nod ... more details
. Dordrecht, The Netherlands, Kluwer Academic. ref Symbiotic diazotrophs Rhizobia these are the species ... 12 ref but their role is less well established than for rhizobia. ref name Vessey Although at first ... http www.rhizobia.co.nz Rhizobia http web.uconn.edu mcbstaff benson Frankia FrankiaHome.htm Frankia ... more details
Taxobox color lightgrey name Bradyrhizobiaceae regnum Bacterium Bacteria phylum Proteobacteria classis Alphaproteobacteria ordo Rhizobiales familia Bradyrhizobiaceae familia authority Garrity et al . 2006 subdivision ranks Genera ref cite web url http www.bacterio.cict.fr classifgenerafamilies.html Bradyrhizobiaceae title List of Prokaryotic Names with Standing in Nomenclature accessdate 20 July 2010 ref subdivision Afipia br Agromonas br Balneimonas br Blastobacter br Bosea br Bradyrhizobium br Nitrobacter br Oligotropha carboxidovorans Oligotropha br Photorhizobium br Rhodoblastus br Rhodopseudomonas br Salinarimonas br The Bradyrhizobiaceae are a family of bacterium bacteria , with ten genera. They include plant associated bacteria such as Bradyrhizobium , a genus of rhizobia associated with some legume s. It also contains animal associated bacteria such as Afipia felis , formerly thought to cause Cat scratch fever cat scratch disease . Others are free living, such as Rhodopseudomonas , a purple bacteria purple bacterium found in marine water and soils. The strain biology strain Rhodopseudomonas palustris DX 1 can generate an electric current with no hydrogen production, a trait that is being explored in the development of the microbial fuel cell ref cite journal author Defeng Xing, Yi Zuo, Shaoan Cheng, John M. Regan, and Bruce E. Logan month year 2008 title Electricity Generation by Rhodopseudomonas palustris DX 1 journal Environ. Sci. Technol. volume 42 pages 4146 doi 10.1021 es800312v pmid 18589979 issue 11 ref . References reflist Category Rhizobiales Proteobacteria stub ca Bradyrhizobiaceae es Bradyrhizobiaceae ... more details
Bradyrhizobium japonicum works with soybean s. ref Moreover, different species of Rhizobia .... Thus, he was able to provide a mixed culture of Rhizobia capable of inoculating plants belonging to several ... of different species of Rhizobia suitable for different plants. Funk infringed by selling similar ... of producing a multi purpose inoculant by mixing together mutually non inhibitive strains of Rhizobia and to the inoculant product comprising a mixture of mutually non inhibitive strains of Rhizobia ... more details
that fix nitrogen diazotrophs Cyanobacteria Azotobacteraceae Rhizobia Frankia Nitrogen fixation by rhizobia and frankia Rhizobia are Gram negative with the ability to establish a N sub 2 sub ... bacteroids, as rhizobia are called in the symbiotic state, are contained in intracellular compartments ... symbiotic bacteria called Rhizobia within root nodule nodules in their root root systems , producing ... also able to interact with rhizobia and form nitrogen fixing nodules ref cite journal first ... more details
by Rhizobium japonicum and Other Rhizobia. J Gen Microbiol 120 517 521. ref Conditions ... processes in nature. Denitrification by rhizobiaRhizobia are soil bacteria with the unique ... of oxygen some rhizobia species are able to switch from O sub 2 sub respiration to using nitrate s to support ... by nar nap, nir, nor and nos genes, respectively. In recent years it has emerged that many rhizobia .... In fact, denitrification can be readily observed in many rhizobia species, in their free living form ... more details
italictitle No footnotes date June 2009 taxobox name Medicago truncatula image Medicago truncatula A17 branch.JPG regnum Plant ae unranked divisio Angiosperms unranked classis Eudicots unranked ordo Rosids ordo Fabales familia Fabaceae subfamilia Faboideae tribus Trifolieae genus Medicago species M. truncatula binomial Medicago truncatula binomial authority Joseph Gaertner Gaertn. Medicago truncatula Barrel Medic or Barrel Medick or Barrel Clover is a small legume native to the Mediterranean region that is used in genome genomic research. It is a low growing, clover like plant 10&ndash 60 cm tall with trifoliate leaf leaves . Each leaflet is rounded, 1&ndash 2 cm long, often with a dark spot in the center. The flower s are yellow, produced singly or in a small inflorescence of 2 5 together the fruit is a small spiny pod. This species has been chosen as a model organism for legume biology because it has a small diploid genome , is self fertile, has a rapid generation time and prolific seed production, and is amenable to genetic Transformation genetics transformation . The genome of M. truncatula is currently being sequenced. It forms symbiosis symbioses with nitrogen fixation nitrogen fixing rhizobia Sinorhizobium meliloti and Sinorhizobium medicae and arbuscular mycorrhizal fungi. The model plant Arabidopsis thaliana does not form either symbiosis, making M. truncatula an important tool for studying these processes. The nodule formation is apparently dependent on the flavonoid s pathway. ref Silencing the flavonoid pathway in Medicago truncatula inhibits root nodule formation and prevents auxin transport regulation by Rhizobia. Anton P. Wasson, Flavia I. Pellerone and Ulrike Mathesius, The Plant Cell, Vol. 18, pp. 1617 1629, July 2006, doi 10.1105 tpc.105.038232 ref It is also an important Fodder forage crop species in Australia . Medicago truncatula Sequencing Consortium The Medicago truncatula Sequencing Consortium is an international partnership of rese ... more details
Unreferenced date December 2009 Taxobox color lightgrey name Rhizobiales image Bartonella.jpg image caption Bartonella regnum Bacterium Bacteria phylum Proteobacteria classis Alphaproteobacteria Alpha Proteobacteria ordo Rhizobiales ordo authority Kuykendall 2006 subdivision ranks Families subdivision Aurantimonadaceae br Bartonellaceae br Beijerinckiaceae br Bradyrhizobiaceae br Brucellaceae br Cohaesibacteraceae br Hyphomicrobiaceae br Methylobacteriaceae br Methylocystaceae br Phyllobacteriaceae br Rhizobiaceae br Rhodobiaceae br Xanthobacteraceae Rhizobiales is an Order biology order of alpha proteobacteria . They are gram negative . The rhizobia , which nitrogen fixation fix nitrogen and are symbiotic with plant roots, appear in several different families here. The Bradyrhizobiaceae , Hyphomicrobiaceae , Phyllobacteriaceae , and Rhizobiaceae are the four families that contain at least six genera of Nitrogen fixation nitrogen fixing , legume nodulating microsymbiotic bacteria. Examples are the genera Bradyrhizobium and Rhizobium . Species of Methylocystaceae are methanotroph , they use methanol methyl alcohol CH sub 3 sub OH or methane CH sub 4 sub as the sole energy and carbon source. Other important genera are Bartonella pathogen and Agrobacterium genetic engineering . References Kuykendall, L. D. and Dazzo, F.B. 2005. Allorhizobium. In Brenner, Krieg, Staley and Garrity Editors , The Alpha , Beta , Delta and Epsilonproteobacteria, The Proteobacteria, Part C, Bergey s Manual of Systematic Bacteriology, 2nd. Ed., Vol. 2, Springer, New York, NY, pp. 345 346. Kuykendall, L. D. 2005 Genus Azorhizobium. In Brenner, Krieg, Staley and Garrity Editors , The Alpha , Beta , Delta and Epsilonproteobacteria, The Proteobacteria, Part C, Bergey s Manual of Systematic Bacteriology, 2nd. Ed.,Vol. 2, Springer, New York, NY, pp. 505 506. Kuykendall, L.D. 2005. Genus Bradyrhizobium, family Bradyrhizobiaceae. In Bergey s Manual of Systematic Bacteriology, 2nd Edition, 2 ... more details
Sundaland heath forest , also known as Kerangas forest , is a type of tropical and subtropical moist broadleaf forests tropical moist forest found on the island of Borneo , which is divided between Brunei , Indonesia , and Malaysia , as well as on the Indonesian islands of Belitung and Bangka Island Bangka , which lie to the west of Borneo. Setting The word Kerangas , which means land which cannot grow rice , came from the Iban language . Heath forest s occur on acidic sandy soils that are the result of the area s siliceous parent rocks. Permanently waterlogged heath forests are known as kerapah forests. The sandy soil of the heath forest are often lacking in nutrients it is generally considered that nitrogen is the nutrient which is most lacking for plant growth in these forests. This is in contrast to many other lowland rain forests where phosphorus is considered to be lacking. A more recent hypothesis, proposed by Proctor 1999 , is that these forests are growing on soils which are highly acidic, such that hydrogen ion toxicity prevents the growth of non adapted species. Flora The Sundaland heath forests are distinct from the surrounding Borneo lowland rain forest s in species composition, structure, texture, and color. The heath forests have a low, uniform canopy, with thick underbrush and rich growth of moss and epiphyte s. Many tree and plant species in the nutrient deprived heath forests have developed unconventional ways to get their nutrients. Some tree species Gymnostoma nobile , for example utilise rhizobia nitrogen fixing bacteria in their root nodules. Myrmecophyte s, including Myrmecodia spp. and Hydnophytum spp., are tree species that develop symbiotic associations with ants to get their nutrients. Other plants, including pitcher plant s Nepenthes spp. , sundew s Drosera ssp. , and bladderwort Utricularia ssp. , are carnivorous, trapping and digesting insects. The heath forests are characterized by many plants of Australasia ecozone Australasian origin ... more details
Taxobox color lightgrey name Alphaproteobacteria image Wolbachia.png image caption Transmission electron micrograph of Wolbachia within an insect cell. br small Credit Public Library of Science Scott O Neill small domain Bacteria phylum Proteobacteria classis Alphaproteobacteria subdivision ranks Order biology Order s subdivision Caulobacteraceae Caulobacterales , e.g., Caulobacter crescentus Caulobacter Kiloniellales Kopriimonadales Kordiimonas gwangyangensis Kordiimonadales Parvularcula Parvularculales Rhizobiales , e.g., Rhizobia Rhodobacteraceae Rhodobacterales Rhodospirillales , e.g., Acetobacter br Rickettsiales , e.g., Rickettsia br Sneathiellales Sphingomonadaceae Sphingomonadales , e.g., Sphingomonas Alphaproteobacteria is a class of Proteobacteria . ref name urlwww.ncbi.nlm.nih.gov cite web url http www.ncbi.nlm.nih.gov Taxonomy Browser wwwtax.cgi?mode Info&id 28211 title www.ncbi.nlm.nih.gov format work accessdate 2009 03 19 ref Like all Proteobacteria, they are Gram negative . Characteristics The Alphaproteobacteria comprise most phototroph ic genera, but also several genera metabolising C1 compounds e.g., Methylobacterium spp. , symbionts of plants e.g., Rhizobium spp. and animals, and a group of pathogens, the Rickettsiaceae . Moreover the precursors of the mitochondria of eukaryotic cells are thought to have originated from Rickettsia spp. in this class See endosymbiotic theory . . Because of their symbiotic properties, scientists often use Alphaproteobacteria of the genus Agrobacterium to transfer foreign DNA into plant genomes, and they also have many other biotechnological properties. ref http www.heribert hirt.info labtimes.htm ref Rickettsialesphylogeny Aerobic anoxygenic phototrophic bacteria are alphaproteobacteria that are a widely distributed marine plankton that may constitute over 10 of the open ocean microbial community. Classification Families, most of which belonging to the Rhizobiales order, include Anaplasmataceae Bartonellaceae Beijer ... more details
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