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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.
- 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.
- Subjects :
- Alginates metabolism
Biopolymers biosynthesis
Biopolymers chemistry
Biopolymers pharmacology
Culture Media
Daucus carota drug effects
Dose-Response Relationship, Drug
Glucuronic Acid metabolism
Hexuronic Acids metabolism
Oryza drug effects
Polysaccharide-Lyases metabolism
Pseudoalteromonas enzymology
Seeds drug effects
Seeds growth & development
Time Factors
Uronic Acids chemistry
Uronic Acids metabolism
Alginates chemistry
Daucus carota growth & development
Glucuronic Acid chemistry
Hexuronic Acids chemistry
Oryza growth & development
Plant Roots drug effects
Plant Roots growth & development
Uronic Acids pharmacology
Subjects
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