Azorhizobium caulinodans :
Azorhizobium caulinodans Microsymbiont/Endosymbiotic
Fixes nitrogen symbiotically/Asymbiotically
On stem/root of Sesabania rostrata
Host range is narrow
Thermostable
Host :
Host Sesabania rostrata
Sesabania punctata
Leucaena spp
Oryza sativa
Phaselous vulgaris
Arabidopsis
Characteristics :
Characteristics Gram negative
Rod shaped
Motile
Obligate aerobes
Peritrichous flagella
Lateral flagella
Rough colonies
Clumping Nature
Classification :
Classification Kingdom:Bacteria
Phylum:Proteobacteria
Class:Alphabacteria
Order:Rhizobiales.
Family:Xanthobacteraceae
Genus:Azorhizobium
Species:Caulinodans
Genetics :
Genetics Genome size:5.37 to 86.7 mbp
single circular chromosome of 5,369,772 base pairs
GC content:67%
Symbiosis: Horizontal gene transfer
-nodABC gene :for backbone biosynthesis
-Nod factors: signal molecules
-nodD gene :open reading frames (ORF1 and ORF2).
Slide 7:
N2 fixation locus-2 includes a tight cluster of four genes:
fixAB genes- encoding an electron-transferring flavoprotein (ETFN)
fixC gene-encoding a presumed ETFN oxidoreductase
fixX gene-encoding a ferredoxin
Applications :
Applications Used as a alternative for nitrogen fertilizer
For Crop improvement
Biological nitrogen fixation
stem-nodulated plants make S. rostrata
- green manure in rice cultivation
-pioneer plant for wetland improvement
Enhances mineral uptake