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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Affiliation: | (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 /content/g25811q723578116/xxlarge8216.gif" alt=" lsquo" align=" BASELINE" BORDER=" 0" >Oligosaccharin /content/g25811q723578116/xxlarge8217.gif" alt=" rsquo" align=" BASELINE" BORDER=" 0" > Pisum (growth inhibition) Rosa Xyloglucan |
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