| Rhizobium tropici | |
|---|---|
Scientific classification  | |
| Domain: | Bacteria |
| Phylum: | Pseudomonadota |
| Class: | Alphaproteobacteria |
| Order: | Hyphomicrobiales |
| Family: | Rhizobiaceae |
| Genus: | Rhizobium |
| Species: | R. tropici |
| Binomial name | |
| Rhizobium tropici Martínez-Romero et al. 1991 [1] | |
| Type strain | |
| ATCC 49672 [2] CIAT 899 DSM 11418 HAMBI 1163 IFO 15247 JCM 21072 LMG 9503 NBRC 15247 | |
Rhizobium tropici is a root nodule bacterium. [1]
Rhizobia are diazotrophic bacteria that fix nitrogen after becoming established inside the root nodules of legumes (Fabaceae). To express genes for nitrogen fixation, rhizobia require a plant host; they cannot independently fix nitrogen. In general, they are gram negative, motile, non-sporulating rods.
Rhizobium is a genus of Gram-negative soil bacteria that fix nitrogen. Rhizobium species form an endosymbiotic nitrogen-fixing association with roots of (primarily) legumes and other flowering plants.
Agrobacterium is a genus of Gram-negative bacteria established by H. J. Conn that uses horizontal gene transfer to cause tumors in plants. Agrobacterium tumefaciens is the most commonly studied species in this genus. Agrobacterium is well known for its ability to transfer DNA between itself and plants, and for this reason it has become an important tool for genetic engineering.
Ensifer meliloti are an aerobic, Gram-negative, and diazotrophic species of bacteria. S. meliloti are motile and possess a cluster of peritrichous flagella. S. meliloti fix atmospheric nitrogen into ammonia for their legume symbionts, such as alfalfa. S. meliloti forms a symbiotic relationship with legumes from the genera Medicago, Melilotus and Trigonella, including the model legume Medicago truncatula. This symbiosis promotes the development of a plant organ, termed a root nodule. Because soil often contains a limited amount of nitrogen for plant use, the symbiotic relationship between S. meliloti and their legume hosts has agricultural applications. These techniques reduce the need for inorganic nitrogenous fertilizers.
A biovar is a variant prokaryotic strain that differs physiologically or biochemically from other strains in a particular species. Morphovars are those strains that differ morphologically. Serovars are those strains that have antigenic properties that differ from other strains.
The Hyphomicrobiales are an order of Gram-negative Alphaproteobacteria.
Ensifer is a genus of nitrogen-fixing bacteria (rhizobia), three of which have been sequenced.
A biofertilizer is a substance which contains living micro-organisms which, when applied to seeds, plant surfaces, or soil, colonize the rhizosphere or the interior of the plant and promotes growth by increasing the supply or availability of primary nutrients to the host plant. Biofertilizers add nutrients through the natural processes of nitrogen fixation, solubilizing phosphorus, and stimulating plant growth through the synthesis of growth-promoting substances. The micro-organisms in biofertilizers restore the soil's natural nutrient cycle and build soil organic matter. Through the use of biofertilizers, healthy plants can be grown, while enhancing the sustainability and the health of the soil. Biofertilizers can be expected to reduce the use of synthetic fertilizers and pesticides, but they are not yet able to replace their use. Since they play several roles, a preferred scientific term for such beneficial bacteria is "plant-growth promoting rhizobacteria" (PGPR).
Pedro II, Piauí is a municipality in the state of Piauí in the Northeast region of Brazil.
Empire City was a 7,295 GRT cargo ship which was built in 1943 by William Doxford & Sons Ltd, Sunderland for the Ministry of War Transport (MoWT). She was torpedoed and sunk on 6 August 1944 by U-198.
Las Palmas Glacier is a glacier flowing west-northwest from Hurd Dome and terminating at Las Palmas Cove, South Bay, Livingston Island, Antarctica. The name was given by the Spanish Antarctic Expedition, about 1991, after the ship Las Palmas of the Spanish Antarctic campaigns since 1988.
Rhizobium leguminosarum is a bacterium which lives in a mutualistic symbiotic relationship with legumes, and has the ability to fix free nitrogen from the air. R. leguminosarum has been very thoroughly studied—it has been the subject of more than a thousand publications.
Neorhizobium galegae is a Gram negative root nodule bacteria. It forms nitrogen-fixing root nodules on legumes in the genus Galega.
Mesorhizobium loti, formerly known as Rhizobium loti, is a Gram negative species of bacteria found in the root nodules of many plant species. Its name is a reference to Lotus corniculatus, a flowering plant from which it was originally isolated.
Rhizobium gallicum is a Gram-negative root-nodule bacterium. It forms nitrogen-fixing root nodules on legumes, being first isolated from those of Phaseolus vulgaris.
Rhizobium hainanense is a Gram negative root nodule bacteria. Strain CCBAU 57015 (166) is the type strain.
Neorhizobium huautlense is a Gram negative root nodule bacterium. It forms nitrogen-fixing root nodules on Sesbania herbacea.
Neorhizobium is a genus of Gram-negative soil bacteria that fix nitrogen. It was recently segregated from the genus Rhizobium. Neorhizobium forms an endosymbiotic nitrogen-fixing association with roots of legumes.
Rhizobium etli is a Gram-negative root-nodule bacterium.
Esperanza Martínez-Romero is a researcher and head of the Genomic Ecology Program at the Center for Genomic Sciences (CCG) of the National Autonomous University of Mexico (UNAM) in Cuernavaca, Mexico. She was awarded the L'Oréal-UNESCO For Women in Science Award in 2020.
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