Sinorhizobium meliloti

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		+	It is a Gram-negative nitrogen-fixing bacterium (rhizobium) and forms a symbiotic relationship with legumes from the genera Medicago, Melilotus and Trigonella, including the model legume Medicago truncatula. This symbiosis results in a new plant organ termed a root nodule.
		+	{| border="1" style="text-align: left;"
		+	|+ '''Scientific classification'''
		+	!Kingdom || Bacteria
		+	|-
		+	! Phylum || Proteobacteria
		+	|-
		+	! Class || Alpha Proteobacteria
		+	|-
		+	! Order || Rhizobiales
		+	|-
		+	! Family || Rhizobiaceae
		+	|-
		+	! Genus || Sinorhizobium
		+	|-
		+	! Species || '''''S. meliloti'''''
		+	|-
		+	! Binomial || ''Sinorhizobium meliloti''
		+	|}
		+	==Surface Characteristics==
		+	The K antigens of Sinorhizobium spp. are major strain-specific antigens, which commonly consist of small repeating units of a hexose and 1-carboxy-2-keto-3-deoxy sugars, such as sialic acid or 3-deoxy-D-manno-2-octulosonic acid (Kdo), although they vary in glycosyl residue composition, substitution patterns, linkage points, anomeric configuration, and size range. The K-antigens of rhizobia do not possess a lipid anchor
		+	==Symbiosis==
		+	The symbiosis between S. meliloti and its plant hosts begins when the plant secretes an array of betaines and flavonoids into the rhizosphere: 4,4'-dihydroxy-2'-methoxychalcone, chrysoeriol, cynaroside, 4',7-dihydroxyflavone, 6′′-O-malonylononin, liquiritigenin, luteolin, 3',5-dimethoxyluteolin, 5-methoxyluteolin, medicarpin, stachydrine, trigonelline. These compounds attract S. meliloti tThe symbiosis between S. meliloti and its plant hosts begins when the plant secretes an array of betaines and flavonoids into the rhizosphere: 4,4'-dihydroxy-2'-methoxychalcone, chrysoeriol, cynaroside, 4',7-dihydroxyflavone, 6′′-O-malonylononin, liquiritigenin, luteolin, 3',5-dimethoxyluteolin, 5-methoxyluteolin, medicarpin, stachydrine, trigonelline. These compounds attract S. meliloti to the surface of the root hairs of the plant where the bacteria begin secreting nod factor.o the surface of the root hairs of the plant where the bacteria begin secreting nod factor.
		+	==Bacteriophage==
		+	Several bacteriophages have been described which infect Sinorhizobium meliloti: Φ1, Φ1A, Φ2A, Φ3A, ΦRmp36A, ΦRmp38, ΦRmp86, ΦSP, ΦSSSS304, ΦSSSS305, ΦSSSS307, ΦSSSS308, and ΦT1.
		+
		+	==References==
		+
		+	[http://en.wikipedia.org/wiki/Sinorhizobium_meliloti Wikipedia]
	[[category: CarboDB]]		[[category: CarboDB]]

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Revision as of 10:18, 8 July 2010

Sinorhizobium meliloti

It is a Gram-negative nitrogen-fixing bacterium (rhizobium) and forms a symbiotic relationship with legumes from the genera Medicago, Melilotus and Trigonella, including the model legume Medicago truncatula. This symbiosis results in a new plant organ termed a root nodule.

Scientific classification

Kingdom	Bacteria
Phylum	Proteobacteria
Class	Alpha Proteobacteria
Order	Rhizobiales
Family	Rhizobiaceae
Genus	Sinorhizobium
Species	S. meliloti
Binomial	Sinorhizobium meliloti

Contents 1 Surface Characteristics 2 Symbiosis 3 Bacteriophage 4 References

Surface Characteristics

The K antigens of Sinorhizobium spp. are major strain-specific antigens, which commonly consist of small repeating units of a hexose and 1-carboxy-2-keto-3-deoxy sugars, such as sialic acid or 3-deoxy-D-manno-2-octulosonic acid (Kdo), although they vary in glycosyl residue composition, substitution patterns, linkage points, anomeric configuration, and size range. The K-antigens of rhizobia do not possess a lipid anchor

Symbiosis

The symbiosis between S. meliloti and its plant hosts begins when the plant secretes an array of betaines and flavonoids into the rhizosphere: 4,4'-dihydroxy-2'-methoxychalcone, chrysoeriol, cynaroside, 4',7-dihydroxyflavone, 6′′-O-malonylononin, liquiritigenin, luteolin, 3',5-dimethoxyluteolin, 5-methoxyluteolin, medicarpin, stachydrine, trigonelline. These compounds attract S. meliloti tThe symbiosis between S. meliloti and its plant hosts begins when the plant secretes an array of betaines and flavonoids into the rhizosphere: 4,4'-dihydroxy-2'-methoxychalcone, chrysoeriol, cynaroside, 4',7-dihydroxyflavone, 6′′-O-malonylononin, liquiritigenin, luteolin, 3',5-dimethoxyluteolin, 5-methoxyluteolin, medicarpin, stachydrine, trigonelline. These compounds attract S. meliloti to the surface of the root hairs of the plant where the bacteria begin secreting nod factor.o the surface of the root hairs of the plant where the bacteria begin secreting nod factor.

Bacteriophage

Several bacteriophages have been described which infect Sinorhizobium meliloti: Φ1, Φ1A, Φ2A, Φ3A, ΦRmp36A, ΦRmp38, ΦRmp86, ΦSP, ΦSSSS304, ΦSSSS305, ΦSSSS307, ΦSSSS308, and ΦT1.

References

Wikipedia