Inhibition of auxin-stimulated growth of pea stem segments by a specific nonasaccharide of xyloglucan |
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Authors: | Gordon J McDougall Stephen c Fry |
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Institution: | (1) Department of botany, University of Edinburgh, King's Buildings, Mayfield Road, EH9 3JH Edinburgh, UK |
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Abstract: | Hemicellulose extracted from cell walls of suspension-cultured rose (Rosa Paul's Scarlet) cells was digested with cellulase from Trichoderma viride. The quantitatively major oligosaccharide products, a nonasaccharide and a heptasaccharide derived from xyloglucan, were purified by gel permeation chromatography. The nonasaccharide was found to inhibit the 2,4-dichlorophenoxy-acetic-acid-induced elongation of etiolated pea (Pisum sativum) stem segments. This confirms an earlier report (York et al., 1984, Plant Physiol. 75, 295–297). The inhibition of elongation by the nonasaccharide showed a maximum at around 10-9M with higher and lower concentrations being less effective. The heptasaccharide did not significantly inhibit elongation at 10-7–10-10M and also did not affect the inhibition caused by the nonasaccharide when co-incubated with the latter.Abbreviations 2,4-D
2,4-dichlorophenoxyacetic acid
- XG
xyloglucan
- XG7
xyloglucan heptasaccharide (Glc4·Xyl3)
- XG9
xyloglucan nonasaccharide (Glc4·Xyl3·Gal·Fuc) |
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Keywords: | Anti-auxin Auxin Oligosaccharingif" alt="lsquo" align="BASELINE" BORDER="0">Oligosaccharin" target="_blank">gif" alt="rsquo" align="BASELINE" BORDER="0"> Pisum (growth inhibition) Rosa Xyloglucan |
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