Extracellular polysaccharide production by Azorhizobium caulinodans from stem nodules of leguminous emergent hydrophyte Aeschynomene aspera.
The Azorhizobium caulinodans isolated from the stem nodules of a leguminous emergent hydrophyte, Aeschynomene aspera, produced a large amount of extracellular polysaccharides (EPS) in yeast extract basal medium. Maximum EPS production was at the stationary phase of growth. EPS production was increased by 919% over control when the medium was supplemented with sucrose (1.5%), D-biotin (1 microgram/ml) and casamino acid (0.1%). EPS contained rhamnose and arabinose. Possible role of the azorhizobial EPS production in the stem nodule symbiosis is discussed.
Ghosh
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AC
Department of Botany, Burdwan University, Golapbag, Burdwan 713104, India.
Basu
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PS
D007887:Fabaceae / Q000378:metabolism* / Q000382:microbiology*; D018547:Plant Stems / Q000382:microbiology*; D010946:Plants, Medicinal; D011135:Polysaccharides, Bacterial / Q000096:biosynthesis*; D012231:Rhizobium / Q000302:isolation & purification / Q000378:metabolism*
D011135:Polysaccharides, Bacterial