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Escherichia coli, also known as E. coli, is a Gram-negative, facultative anaerobic, rod-shaped, coliform bacterium of the genus Escherichia that is commonly found in the lower intestine of warm-blooded organisms (endotherms). Most E. coli strains are harmless, but some serotypes (EPEC, ETEC etc.) can cause serious food poisoning in their hosts, and are occasionally responsible for food contamination incidents that prompt product recalls. The harmless strains are part of the normal microbiota of the gut, and can benefit their hosts by producing vitamin K2, (which helps blood to clot) and preventing colonisation of the intestine with pathogenic bacteria, having a symbiotic relationship. E. coli is expelled into the environment within fecal matter. The bacterium grows massively in fresh fecal matter under aerobic conditions for 3 days, but its numbers decline slowly afterwards.
Chitinases are hydrolytic enzymes that break down glycosidic bonds in chitin.
Pseudomonas is a genus of Gram-negative, Gammaproteobacteria, belonging to the family Pseudomonadaceae and containing 191 validly described species. The members of the genus demonstrate a great deal of metabolic diversity and consequently are able to colonize a wide range of niches. Their ease of culture in vitro and availability of an increasing number of Pseudomonas strain genome sequences has made the genus an excellent focus for scientific research; the best studied species include P. aeruginosa in its role as an opportunistic human pathogen, the plant pathogen P. syringae, the soil bacterium P. putida, and the plant growth-promoting P. fluorescens, P. lini, P. migulae, and P. graminis.
Serratia is a genus of Gram-negative, facultatively anaerobic, rod-shaped bacteria of the family Yersiniaceae. According to the List of Prokaryotic names with Standing Nomenclature (LPSN), there are currently 19 species of Serratia that are credibly published with accurate names as of 2020: S. aquatilis, S. entomophila, S. ficaria, S. fonticola, S. grimesii, S. liquefaciens, S. marcescens, S. microhaemolytica, S. myotis, S. nematodiphila, S. odoriferae, S. oryzae, S. plymuthica, S. proteamaculans, S. quinivorans corrig, S. rubidaea, S. symbiotica, S. ureilytica, S. vespertilionis. They are typically 1–5 μm in length, do not produce spores, and can be found in water, soil, plants, and animals. Some members of this genus produce a characteristic red pigment, prodigiosin, and can be distinguished from other members of the order Enterobacterales by their unique production of three enzymes: DNase (nucA), lipase, and gelatinase (serralysin). Serratia was thought to be a harmless environmental bacteria until it was discovered that the most common species in the genus, S. marcescens, is an opportunistic pathogen of many animals, including humans. In humans, S. marcescens is mostly associated with nosocomial, or hospital-acquired, infections, but can also cause urinary tract infections, pneumonia, and endocarditis. S. marcescens is frequently found in showers, toilet bowls, and around wetted tiles as a pinkish to red biofilm but only causes disease in immunocompromised individuals. Aside from S marcescens, some rare strains of the Serratia species S. plymuthica, S. liquefaciens, S. rubidaea, and S. odoriferae have been shown to cause infection such as osteomyelitis and endocarditis.
Pseudomonas putida is a Gram-negative, rod-shaped, saprotrophic soil bacterium.
Aeromonas hydrophila is a heterotrophic, Gram-negative, rod-shaped bacterium mainly found in areas with a warm climate. This bacterium can be found in fresh or brackish water. It can survive in aerobic and anaerobic environments, and can digest materials such as gelatin and hemoglobin. A. hydrophila was isolated from humans and animals in the 1950s. It is the most well known of the species of Aeromonas. It is resistant to most common antibiotics and cold temperatures and is oxidase- and indole-positive. Aeromonas hydrophila also has a symbiotic relationship as gut flora inside of certain leeches, such as Hirudo medicinalis.
Pseudomonas mosselii is a Gram-negative, rod-shaped, bacterium clinically isolated in France. Based on 16S rRNA analysis, P. mosselii has been placed in the P. putida group.
Pseudomonas monteilii is a Gram-negative, rod-shaped, motile bacterium isolated from human bronchial aspirate. P. monteilii grows in temperatures below 40 degrees Celsius. The species is capable of respiratory metabolism, but not fermentative metabolism. Laboratory observations were made on the species' production of fluorescent pigments, cytochrome oxidases, and catalases. The species is named in honor of the French microbiologist Henri Monteil.
Ananda Mohan Chakrabarty, Ph.D. was an Indian American microbiologist, scientist, and researcher, most notable for his work in directed evolution and his role in developing a genetically engineered organism using plasmid transfer while working at GE, the patent for which led to landmark Supreme Court case, Diamond v. Chakrabarty.
Phosphate solubilizing bacteria (PSB) are beneficial bacteria capable of solubilizing inorganic phosphorus from insoluble compounds. P-solubilization ability of rhizosphere microorganisms is considered to be one of the most important traits associated with plant phosphate nutrition. It is generally accepted that the mechanism of mineral phosphate solubilization by PSB strains is associated with the release of low molecular weight organic acids, through which their hydroxyl and carboxyl groups chelate the cations bound to phosphate, thereby converting it into soluble forms. PSB have been introduced to the Agricultural community as phosphate Biofertilizer. Phosphorus (P) is one of the major essential macronutrients for plants and is applied to soil in the form of phosphate fertilizers. However, a large portion of soluble inorganic phosphate which is applied to the soil as chemical fertilizer is immobilized rapidly and becomes unavailable to plants. Currently, the main purpose in managing soil phosphorus is to optimize crop production and minimize P loss from soils. PSB have attracted the attention of agriculturists as soil inoculums to improve the plant growth and yield. When PSB is used with rock phosphate, it can save about 50% of the crop requirement of phosphatic fertilizer. The use of PSB as inoculants increases P uptake by plants. Simple inoculation of seeds with PSB gives crop yield responses equivalent to 30 kg P2O5 /ha or 50 percent of the need for phosphatic fertilizers. Alternatively, PSB can be applied through fertigation or in hydroponic operations. Many different strains of these bacteria have been identified as PSB, including Pantoea agglomerans (P5), Microbacterium laevaniformans (P7) and Pseudomonas putida (P13) strains are highly efficient insoluble phosphate solubilizers. Recently, researchers at Colorado State University demonstrated that a consortium of four bacteria, synergistically solubilize phosphorus at a much faster rate than any single strain alone. Mahamuni and Patil (2012) isolated four strains of phosphate solubilizing bacteria from sugarcane (VIMP01 and VIMP02) and sugar beet rhizosphere (VIMP03 and VIMP 04). Isolates were strains of Burkholderia named as VIMP01, VIMP02, VIMP03 and VIMP04. VIMP (Vasantdada Sugar Institute Isolate by Mahamuni and Patil) cultures were identified as Burkholderia cenocepacia strain VIMP01 (JQ867371), Burkholderia gladioli strain VIMP02 (JQ811557), Burkholderia gladioli strain VIMP03 (JQ867372) and Burkholderia species strain VIMP04 (JQ867373)6].
Delftia lacustris is a Gram-negative, nonfermentative, motile, rod-shaped bacterium from the family Comamonadaceae, which was isolated from mesotrophic lake water in Denmark. It has the ability to degrade peptidoglycan through chitinase and lysozyme activity.
Thermococcus chitonophagus is a chitin-degrading, hyperthermophilic archaeon isolated from a deep-sea hydrothermal vent. It is anaerobic, round to slightly irregular coccus-shaped, 1.2–2.5 μm in diameter, and motile by means of a tuft of flagella.
Streptomyces glauciniger is a mesophilic bacterium species from the genus of Streptomyces which has been isolated from soil in south China.
Streptomyces kurssanovii is a bacterium species from the genus of Streptomyces which has been isolated from soil in Russia. Streptomyces kurssanovii produces chitinase, N-(Phenylacetyl)-2-butenediamide and fumaramidmycin.
Streptomyces thermoviolaceus is a thermophilic bacterium species from the genus of Streptomyces which has been isolated from composts. Streptomyces thermoviolaceus produces chitinase and peroxidase.
Massilia putida is a Gram-negative and motile bacterium from the genus Massilia with a single polar flagellum, which has been isolated from a wolfram mine in Dayu County in the Jiangxi Province in China. Massilia putida has the ability to produce dimethyl disulfide.
Laceyella sediminis is a thermophilic bacterium from the genus of Laceyella which has been isolated from sediments from a hot spring in Tengchong in China.
Laceyella tengchongensis is a thermophilic bacterium from the genus of Laceyella which has been isolated from soil from the Big Empty Volcano in Tengchong in China.
Laceyella sacchari is a bacterium from the genus of Laceyella which has been isolated from a bagasse in Thailand.
Altererythrobacter marensis is a Gram-negative bacterium from the genus of Altererythrobacter which has been isolated from seawater near the Mara Island on Korea.
References
- 1 2 Parte, A.C. "Laceyella". LPSN . Retrieved 28 November 2016.
- ↑ "Laceyella putida Taxon Passport - StrainInfo". www.straininfo.net. Retrieved 28 November 2016.
- 1 2 "Laceyella putida". www.uniprot.org. Retrieved 28 November 2016.
- ↑ "Details: DSM-44608". www.dsmz.de.
- ↑ Shibasaki, Hiroki; Uchimura, Kohsuke; Miura, Takeshi; Kobayashi, Tohru; Usami, Ron; Horikoshi, Koki (16 April 2014). "Highly thermostable and surfactant-activated chitinase from a subseafloor bacterium, Laceyella putida". Applied Microbiology and Biotechnology. 98 (18): 7845–7853. doi:10.1007/s00253-014-5692-9. PMID 24737059. S2CID 16303625.
