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Root growth-promoting activity of unsaturated oligomeric uronates from alginate on carrot and rice plants.

Root growth-promoting activity of unsaturated oligomeric uronates from alginate on carrot and rice plants.

Authors :
Xu X
Iwamoto Y
Kitamura Y
Oda T
Muramatsu T
Source :
Bioscience, biotechnology, and biochemistry [Biosci Biotechnol Biochem] 2003 Sep; Vol. 67 (9), pp. 2022-5.
Publication Year :
2003

Abstract

The root elongation activity of unsaturated oligomeric uronates from alginate on carrot and rice plants was investigated. Unsaturated oligomeric uronates were prepared by digesting polymannuronate (PM) and polyguluronate (PG) with an alginate lyase purified from Pseudoalteromonas sp. strain No. 272. The root elongation activity was measured by elongation in length of carrot- and rice-excised root incubated in the B5-medium containing 0.8% agar in the dark. PM and PG showed no activity, but the enzymatic digestion mixtures of PG had promoting activity on roots of both plants at a final concentration of 0.5 mg/ml. The maximum activity was obtained at 0.75 mg/ml. The dependence of activity on degree of polymerization of the uronates was tested and the pentamer was most active, but the mechanism of the action of unsaturated uronates on the cells remains to be solved.

Details

Language :
English
ISSN :
0916-8451
Volume :
67
Issue :
9
Database :
MEDLINE
Journal :
Bioscience, biotechnology, and biochemistry
Publication Type :
Academic Journal
Accession number :
14519996
Full Text :
https://doi.org/10.1271/bbb.67.2022