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Isolation and characterization of alginate-derived oligosaccharides with root growth-promoting activities
May 1994
May 1994
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Abstract
Lytic digestion of poly(mannuronate), poly(guluronate), and alginate with an alginate
lyase from Alteromonas macleodii was used to prepare mixtures of unsaturated oligosaccharides.
Four oligosaccharides isolated from the alginate lyase-lysate by anion-exchange chromatography
on Q-Sepharose were found to be the major components of the root growth-promoting
lysate. The oligosaccharides were analyzed by NMR and SIMS and identified as di- and
tri-saccharides having O-(4-deoxy-L-erythro-hex-4-enopyranosyluronic acid)-1--> at
the nonreducing terminus. The trisaccharides from the lysate were found to have root
growth-promoting activity in a barley bioassay.
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