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| | Title of Invention: Rhizosheric bacteria |
 | | The structure of the recombinant strains was confirmed by Southern blot hybridization analysis. | | | For the experiment to provide useful data, this number should be at least 10-fold less than obtained in the experiment done with inoculated seed. | | | Competition experiments similar to those described for soybean were also done with alfalfa. |
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http://www.nal.usda.gov/bic/Biotech_Patents/1995patents/05427785.html
(15394 words)
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| | Science Fair: The Effect of Rhizobium Leguminosarum on Pea Plants |
| | For example, in our first attempt we grew our own bacteria and sterilized our own soil. | | | We could vary soil conditions to see if that affected successful inoculation and nodulation. | | | Don't waste time (set up the experiment and finish it) |
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http://www.geocities.com/organic_gardener/legume.html
(2630 words)
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| | From: Allen, Lisa |
| | Describe the relationship between the structure and function of this | | | Q : Explain what a plasid is and its suggested role in sybiosis in the | | | Q: In Seminar #5 Dr. Michael Hynes focused on the bacterial genus |
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http://www.uleth.ca/bio/bio4500/seminar5.html
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| | Special Message from Eric Kindberg, Organic Farmer |
| | It is time to halt and with valid and quality information rethink our future. | | | Congressional action and investigation plus an injunctive relief should be sought immediately. | | | Rhizobium bacteria are essential to all life on earth and a, really the, critical component in world agricultural ecology health. |
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http://www.fastq.com/~dwaz/alert.html
(1987 words)
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| | Backyard Gardener - Growing Legumes to Increase Soil Nitrogen, December 1, 2004 |
| | The relationship is actually much more complex than the aforementioned explanation and has resulted because the two organisms have coevolved for hundreds of thousands of years. | | | The inoculant has a certain shelf life and must be stored under cool, dark conditions. | | | The relationship between legumes and Rhizobium bacteria is symbiotic (both organisms benefit). |
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http://ag.arizona.edu/yavapai/anr/hort/byg/archive/growinglegumestoincreasesoilnitrogen.html
(676 words)
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| | How plants & bacteria talk to each other: 1/99 |
| | Her research also has led to new insights into basic mechanisms of cell behavior, which may be applicable to other organisms. | | | Long's research has tried to find out how these partners cause such profound changes in each other's growth and behavior. | | | In her work, Long has investigated how these specific bacteria and plants recognize one another, in the dark and underground, in the absence of the nervous system that allows animals to recognize each other. |
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http://news-service.stanford.edu/news/1999/january27/plantslong127.html
(498 words)
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| | Nexus Research Group - FUN Science and home experiments... |
| | Try the next experiment that looks at the plant/bacteria symbiosis and the benefit to the plant. | | | Nexus Research Group - FUN Science and home experiments... | | | What other organisms live in a symbiotic relationship? |
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http://www.nexusresearchgroup.com/microbiology/rhiziso.htm
(602 words)
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| | EPA: Federal Register: Rhizobium Inoculants; Exemption From the Requirement of a Tolerance |
| | Endocrine Disruptors The Agency has no information to suggest that Rhizobium inoculants will adversely affect the immune or endocrine systems. | | | EPA has also considered available information concerning the variability of the sensitivities of major identifiable subgroups of consumers, including infants and children. | | | However, EPA feels it is appropriate to exclude Rhizobium strains intentionally developed to express rhizobitoxine from this inert clearance because of possible additional human exposure to rhizobitoxine. |
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http://www.epa.gov/fedrgstr/EPA-PEST/1999/October/Day-15/p26862.htm
(2970 words)
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| | Plant Research Articles |
| | This study suggests that it may play a role in determining host specificity. | | | To submit a plant research article as part of the homework assignment, follow the correct link below corresponding to your lab day: | | | This study is concerned with the interaction between Rhizobium bacteria and their leguminous plant hosts. |
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http://www.stanford.edu/class/biosci44/plants/articles.html
(7919 words)
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| | Soil Fertility Guide - Nitrogen Fixation - Manitoba Agriculture, Food and Rural Initiatives |
| | Growers should consider application of 40-60 lb N/ac where beans yield less than 1500 lb/ac and 60-90 lb N/ac where yields regularly exceed 1500 lb/ac. | | | These problems have not been observed in recent years. | | | Pre-inoculation of seed has proven effective for nodulation of alfalfa and other forage legumes but has not yet proved satisfactory for large seeded legumes. |
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http://www.gov.mb.ca/agriculture/soilwater/soilfert/fbd02s13.html
(575 words)
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| | Occurrence of Choline and Glycine Betaine Uptake and Metabolism in the Family Rhizobiaceae and Their Roles in ... |
| | Variations in the response of salt-stressed Rhizobium strains to betaines. | | | Choline-glycine betaine pathway confers a high level of osmotic tolerance in Escherichia coli. | | | Dendrogram (constructed by using the unweighted pair group method with arithmetic mean) showing the genetic relationships among 16S ribosomal DNA genotypes identified by PCR-restriction fragment length polymorphic analysis (17) of the Rhizobiaceae strains used in this study. |
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http://aem.asm.org/cgi/content/full/65/5/2072?maxtoshow=&HITS=&hits=&...
(3399 words)
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| | H.P.Spaink,Molecular Basis,Host,Rhizobium |
| | The results of the induction experiments (Table 3) show that luteolin can induce the nod promoter to a substantial level regardless of the nodD source. | | | Recently, evidence has been presented by Recourt et al. | | | The nodD genes are functionally different in (i) their response to various exogenously added flavonoid inducers, (ii) the extent to which they mediate the activation of the flavonoid-inducible promoters, and (iii) the extent to which they repress their own constitutive transcription. |
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http://wwwimp.leidenuniv.nl/~spaink/ANTOVAN1.HTML
(3201 words)
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| | Nature Works - Decomposers |
| | Bacteria are prokaryotic, which means they don't have a nucleus or a mitochondrea like other single-celled organisms. | | | Bacteria are among the smallest forms of life on Earth. | | | Some bacteria are harmful and cause diseases like typhoid and cholera. |
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http://www.nhptv.org/natureworks/nwep11b.htm
(402 words)
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| | Bacteria |
| | Vast numbers of bacteria live in our bodies. | | | This bacteria and humans have formed a symbioses with each other. | | | I have researched these microscopic, unicellular organisms and found out that bacteria are responsible for much more than just diseases. |
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http://www.amnh.org/nationalcenter/youngnaturalistawards/1998/bacteria.html
(1094 words)
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| | Beneficial microbes |
| | Isolation of Rhizobium: If desired, students can isolate Rhizobium from a nodule and use the cultured organisms to inoculate bean seeds to see if nodules form. | | | In this exercise, students will observe some of the beneficial microbes associated with bean plants. | | | I find it is a good idea to have the students make drawings of what they have seen. |
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http://www.agron.iastate.edu/plantscience/Beneficial_microbes.htm
(1242 words)
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| | DLC-ME The Microbe Zoo Dirtland Root Cellar |
| | The rhizobia follow a pathway inside the root hair to get to the root cortex. | | | Some bacteria are able to make all amino acids, unlike humans which cannot make about 8 amino acids for which they must rely on other organisms, like microbes and plants, to make for them. | | | Nutrients- the necessary components of food that microbes and all life require to exist and grow. |
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http://commtechlab.msu.edu/sites/dlc-me/zoo/zdrmain.html
(1419 words)
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| | [No title] |
| | Another experiment was done in order to look at the competition between the strains during nodulation. | | | The experiments were done in the phytotron at the University of Tromsø. | | | It has been shown that the correct choice of a Rhizobium strain for a particular white clover variety may determine its success in the field. |
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http://www.rala.is/sd/sdenglish.htm
(698 words)
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| | Rhizobia - Wikipedia, the free encyclopedia |
| | The genes responsible for the symbiosis with plants, however, may be closer than the organisms themselves, acquired by horizontal transfer rather than from a common ancestor. | | | These groups also include a variety of other bacteria. | | | Frankia and Azospirillum, are genera of similar bacteria that do not live on legumes. |
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http://en.wikipedia.org/wiki/Rhizobium_bacteria
(305 words)
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| | Page Title |
| | The affected area could be sown with alfalfa seeds containing the genetically engineered Rhizobium microbes and the site would experience at least partial remediation without the need for human involvement. | | | One of the best sources for such bacteria are the polluted sites themselves, as they offer a native flora that has been in the process of adapting to the new, polluted conditions. | | | Toluene is a dangerous pollutant that is found in fuel and various solvents and DNT is what makes plastic and Styrofoam such a serious waste disposal problem. |
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http://www.nd.edu/~aostafin/benl/2002/page9.html
(463 words)
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| | Biological Sciences |
| | To identify features of the bacteria that are essential during infection and later nodule development, the basic approach has been to isolate and to study bacterial mutants that are defective in these processes. | | | (2000) Rhizobium lipopolysaccharide and its role in symbiosis. | | | Although these are beneficial bacteria, the questions we ask are ones that are relevant to virulence mechanisms of bacteria that cause plant or human disease. |
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http://mendel.biol.mu.edu/faculty/noel.html
(745 words)
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| | s9chap2 |
| | For more information about research on Rhizobium go to the Rhizobium Research Laboratory. | | | Besides the knowledge of the molecular basis of biological nitrogen fixation and the technology to manipulate the genome, a deep understanding of the ecology of nitrogen fixing organisms and of the fate of introduced new genetic information into the soil will be necessary to achieve these goals. | | | This symbiosis is a specific process, a certain species of Rhizobium can only nodulate a certain type of legume, for example: R. etli nodulates beans (Phaseolus), R. meliloti nodulates alfalfa (Medicago). |
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http://www.soils.agri.umn.edu/academics/classes/soil2125/doc/s9chap2.htm
(1973 words)
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| | Root nodule - definition of Root nodule in Encyclopedia |
| | Root nodules that occur on non-legume genera like Parasponia in association with Rhizobium bacteria and those that arise from symbiotic interactions with Actinobacteria Frankia in some plant genera such as Alnus vary significantly from those formed in the legume-rhizobia symbiosis. | | | Under nitrogen limiting conditions plants from the Family Leguminosae form a symbiotic relationship with a host-specific strain of bacteria known as rhizobia. | | | The bacteria enter the developing nodule through a structure called an infection thread, then they are then surrounded by a plant derived membrane and differentiate into bacteroids that fix nitrogen. |
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http://encyclopedia.laborlawtalk.com/Root_nodule
(278 words)
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| | LEGUME NITROGEN FIXATION AND TRANSFER |
| | -fixation) process between the legume plant and rhizobia bacteria is referred to as a symbiotic (mutually beneficial) relationship. | | | Poor nodulation may occur even if good seed inoculation practices were used. | | | While there are several brands of inoculant, the most effective ones are those which have a large number of rhizobia per gram of inoculant and contain a sticker such as HiStick and Pelinoc-Pelgel, that helps hold the inoculant to the seed. |
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http://overton.tamu.edu/clover/cool/nfix.htm
(1520 words)
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| | Chemical Communication Threatened by Endocrine-Disrupting Chemicals |
| | Studies of analogous signaling methods used by a number of organisms may shed light on endocrine signaling and human health. | | | Because signaling communication webs are not unidirectional, we must consider not only how synthetic chemicals produced by humans may adversely affect biota in the environment but also how signals originating in bacteria or plants may affect signaling within the human body (McFall-Ngai 2002). | | | In addition, these same phytoestrogens may be responsible for hormone alterations in humans that lead to reduced risk of hormone-dependent cancers (Zava and Duwe 1997). |
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http://ehp.niehs.nih.gov/members/2004/6455/6455.html
(5673 words)
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| | Pennington Seed |
| | Plant response Rhizobium infection is referred to as nodulation. | | | In a symbiotic relationship, both the plant and bacteria contribute and both also receive as a result of their association. | | | As noted before, both the plant and bacteria are involved in the fixation process. |
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http://www.penningtonseed.com/beta/section/forage_02.asp?type=articles&id=241
(1115 words)
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| | Lychees Online - Lychee Fruit, Trees, Products & Info |
| | Bacteria are tiny, one-celled organisms — generally 4/100,000 of an inch wide (1 µm) and somewhat longer in length. | | | Nitrogen-fixing bacteria form symbiotic associations with the roots of legumes like clover and lupine, and trees such as alder and locust. | | | Some researchers think it may be possible to control the plant species in a place by managing the soil bacteria community. |
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http://www.lycheesonline.com/bacteria.cfm
(984 words)
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| | Mutualism. (from symbiosis) -- Britannica Student Encyclopedia |
| | Mutualistic arrangements are most likely to develop between organisms with widely differing living requirements. | | | One of the best-known mutualistic relationships is the one between nitrogen-fixing Rhizobium bacteria and several leguminous plants such as beans, peas, peanuts, and alfalfa (see Legume). | | | An ongoing study of a highly cooperative group of long-lived nuns has been shedding considerable light on aging and Alzheimer disease. |
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http://www.britannica.com/ebi/article-210847?tocId=210847
(717 words)
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| | Untitled Document |
| | This is a good example of a mutualistic relationship-both organisms benefit, and, as far as we know, neither does harm to the other. | | | Different strains of the nitrogen-fixing Rhizobium bacteria will form relationships with certain legumes, but not others. | | | By adding inoculant to the soil, students can explore which legumes form relationships with the rhizobium and the differences between plants grown with and without rhizobium. |
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http://www.kidsgardening.com/onlinecourse/PartII21.htm
(144 words)
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| | Research School of Biological Sciences |
| | My scientific interests are in the molecular analysis of plant-microbe interactions, particularly those involving Rhizobium bacteria because of its importance to symbiotic nitrogen fixation, but also endophytic bacteria because both these groups of organisms can also serve as model systems for plant pathology. | | | The third section of our program is the development of the 2-Dimensional gel electrophoresis technology for Proteome analysis and its application to various biological systems such as, Rhizobium bacteria, different plant tissues and Wallaby brain tissues. | | | The program involves three integrated research project areas. |
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http://www.rsbs.anu.edu.au/profiles/barry_rolfe/index.asp?printVersion=1
(476 words)
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| | National Teachers Enhancement Network: Vocabulary List |
| | Capable of forming a symbiotic relationship with Rhizobium bacteria on the nodules of the roots. | | | A close prolonged association between two or more different organisms of different species that may, but does not necessarily, benefit each member. | | | The conversion by certain soil microorganisms, such as rhizobia, of atmospheric nitrogen into compounds that plants and other organisms can assimilate. |
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http://www.scienceteacher.org/k12resources/lessons/lesson29/vocabulary.htm
(189 words)
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| | Nitrogen fixation |
| | The best known are legumess such as clover which contain symbiotic rhizobium bacteria within nodules in their root systems, producing nitrogen compounds that help to fertilize the soil. | | | Nitrogen fixation is performed naturally by a number of different prokaryotes, including bacteria, actinomycetes and cyanobacteria. |
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http://www.sciencedaily.com/encyclopedia/nitrogen_fixation
(227 words)
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| | USDA Agricultural Research Service |
| | It could also mean less need for human clean-up crews, and lower their risk of exposure to dangerous chemicals. | | | (Photo: a cross-section of a root nodule--a tiny lump in which Rhizobium bacteria would do their clean-up work. | | | As a student not long ago, she helped ARS and Howard University scientists study the Rhizobium bacteria. |
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http://www.ars.usda.gov/is/kids/environment/story3/rhizobium.htm
(596 words)
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| | Soybeans - Soybean Inoculants |
| | Several types of inoculum carriers are currently available for soybean seed treatment. | | | Or, if the field has a previous history of soybean production, the rhizobium bacteria may already be present in the soil. | | | Some important factors that affect nodulation are the viability of the inoculum, the amount of rhizobium on the seed, and the soil nitrate level. |
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http://www.ag.ndsu.nodak.edu/aginfo/procrop/syb/soyinc04.htm
(522 words)
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| | Mutualism |
| | Mutualism can involve brief or long-terminteractions (pollination versus lichen symbiosis between fungus and alga) and may or may not be obligatory for one or bothpartners. | | | Mycorrhizal fungi, on the other hand, can be totally dependent on their plant hosts. | | | For example, rhizobium bacteria can reproduce either in the soil or in (usually) mutualistic symbiosis with legumeplants. |
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http://www.therfcc.org/mutualism-7541.html
(101 words)
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| | Student research profile: Skye Schulte |
| | Sophisticated stuff, but all part of a day's work for this for a 20-year-old from Marshfield, Wis. | | | Skye Schulte wrestled an uncooperative experiment for six months before getting usable results, and acknowledges getting an introduction to despair as well as to science. | | | We had virtually no information in the scientific literature, so we had to do it by trial and error, switching and adjusting variables until we got something we wanted." |
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http://www.cals.wisc.edu/media/news/98sci_rept/honorsside2.html
(419 words)
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| | What is nitrogen fixation? - |
| | Sheltered inside the nodule from rapid or drastic changes in the soil and receiving food (sugars, carbohydrates) from the clover, the bacteria become bacteroids. | | | Clover root systems have a symbiotic relationship with bacteria, Rhizobium trifolii. | | | Trifolin has a specific affinity for the carbohydrate, 2-desoxyglucose, found in the cell wall of the Rhizobium bacterium. |
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http://www.killerplants.com/weird-plants/20030710.asp
(432 words)
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| | Rhizobium and Agrobacterium |
| | Sample problem: Which bacterium is involved in reducing atmospheric nitrogen? | | | Legumes can live lots of places other plants can't. | | | Study Questions and Vocabulary: Note that this page is for the entire week on bacteria and viruses. |
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http://morgan.botany.uga.edu/btny1220/syllabus/lec/agronitro.htm
(443 words)
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| | Energy Citations Database (ECD) - Energy and Energy-Related Bibliographic Citations |
| | Availability information may be found in the Availability, Publisher, Research Organization, Resource Relation and/or Author (affiliation information) fields and/or via the "Full-text Availability" link. | | | For a journal article, please see the Resource Relation field. | | | Symbiont effect of Rhizobium bacteria and vesicular arbuscular mycorrhizal fungi on Pisum sativum in recultivated mine spoils |
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http://www.osti.gov/energycitations/product.biblio.jsp?osti_id=7054648
(131 words)
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| | Cover Crop Benefits |
| | Plants take up excess soil nitrogen and return it to the soil when they are turned under. | | | In addition, legumes, such as clover, fix atmospheric nitrogen in special nodules on their roots, in collaboration with Rhizobium bacteria. | | | This nitrogen can be used by the next crop you grow. |
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http://www.organicgardening.com/feature/0,7518,s1-5-21-790,00.html
(403 words)
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| | [No title] |
| | This mutualism enables legumes to grow on relatively poor soils and to enrich nitrogen-poor soils in the process (nitrogen is a limiting nutrient for terrestrial plants). | | | Most members of Fabaceae have root nodules with nitrogen-fixing bacteria (Rhizobium spp.). |
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http://www.mhhe.com/biosci/pae/botany/botany_map/articles/article_27.html
(627 words)
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| | Soybean Nitrogen Fixation, Inoculation, and Nodulation by Rhizobium Bacteria |
| | Soyfoods Center also offers a special feature: detailed information about related commercial soyfood products, including the product name, date of introduction, manufacturer's name and address, sources of addition information and, with most recent products, ingredients. | | | Order the best selling "Book of Tofu II - Tofu and Soymilk Production" - | | | Soybean Nitrogen Fixation, Inoculation, and Nodulation by Rhizobium Bacteria |
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http://www.thesoydailyclub.com/SFC/bookF004.asp
(384 words)
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