Rhizobia

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• Rhizobia — (from the Greek words rhiza = root and bios = Life) are soil bacteria that fix nitrogen (diazotrophy) after becoming established inside root nodules of legumes (Fabaceae). The rhizobia cannot independently fix nitrogen, and requires a plant host …   Wikipedia

• rhizobia — n. any of several species of bacteria found on the roots of some plants …   English contemporary dictionary

• stem-nodulating rhizobia — Rhizobia (members of the genera Rhizobium, Bradyrhizobium, and Azorhizobium) that produce nitrogen fixing structures above the soil surface on plant stems. These most often are observed in tropical plants and produced by Azorhizobium …   Dictionary of microbiology

• Nitrogen fixation — is the natural process, either biological or abiotic, by which nitrogen (N2) in the atmosphere is converted into ammonia (NH3).[1] This process is essential for life because fixed nitrogen is required to biosynthesize the basic building blocks of …   Wikipedia

• Denitrification — Nitrogen cycle. Denitrification is a microbially facilitated process of nitrate reduction that may ultimately produce molecular nitrogen (N2) through a series of intermediate gaseous nitrogen oxide products. This respiratory process reduces… …   Wikipedia

• Diazotroph — Diazotrophs are bacteria and archaea that fix atmospheric nitrogen gas into a more usable form such as ammonia.[1] A diazotroph is an organism that is able to grow without external sources of fixed nitrogen. Examples of organisms that do this are …   Wikipedia

• Rizobio — Saltar a navegación, búsqueda Este artículo trata sobre el grupo no taxonómico de microorganismos Rizobios. Para el género típico, véase Rhizobium. Nódulos en las raíces de soja, conteniendo miles de millones de bacterias Bradyrhizobium. Los… …   Wikipedia Español

• Life Sciences — ▪ 2009 Introduction Zoology       In 2008 several zoological studies provided new insights into how species life history traits (such as the timing of reproduction or the length of life of adult individuals) are derived in part as responses to… …   Universalium

• Nod factor — The structure of nod factor from Sinorhizobium meliloti. Nodulation (Nod) factors are signaling molecules produced by bacteria known as rhizobia during the initiation of nodules on the root of legumes. A symbiosis is formed when legumes take up… …   Wikipedia

• Mutualism (biology) — Hummingbird Hawkmoth drinking from Dianthus. Pollination is a classic example of mutualism. Mutualism is the way two organisms of different species biologically interact in a relationship in which each individual derives a fitness benefit (i.e.,… …   Wikipedia

• Rhizobium — Rhizobium …   Wikipédia en Français