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Exudation of alcohol and aldehyde sugars from roots of defoliated Lolium perenne L. grown under sterile conditions

Clayton, S. J., Read, D. B., Murray, P. J. and Gregory, P. J. (2008) Exudation of alcohol and aldehyde sugars from roots of defoliated Lolium perenne L. grown under sterile conditions. Journal of Chemical Ecology, 34 (11). pp. 1411-1421. ISSN 0098-0331

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To link to this article DOI: 10.1007/s10886-008-9536-x

Abstract/Summary

Root exudates were collected over a 27 day period from defoliated and non-defoliated Lolium perenne L. plants grown under sterile conditions in microlysimeters. Eleven individual sugars, including both aldehyde and alcohol sugars, were identified and quantified with a gas chromatograph-mass spectrometer (GC-MS). There was no change in the number of sugars present between 7 and 27 days, but the exudation of alcohol sugars decreased rapidly at about day 12. Xylose and glucose were present in the largest amounts. Defoliation initially increased the total amount of sugars in the exudates, but continuous defoliation reduced total sugar exudation by 16% and induced changes in the exudation patterns of individual sugars. Defoliation enhanced exudation of erythritol, threitol, and xylitol, reduced exudation of glucose and arabitol, but had little effect on the amounts of other sugars exuded. The more complex 6 C, 5 OH aldehyde sugars, especially glucose, showed changes earlier and to a greater extent (17 days), than the 5 C, 4 OH (xylose and ribose) and 6 C 4 OH (fucose) aldehyde groups. These findings confirm the general finding that repeated defoliation reduces the quantity of total sugars exuded, but the pattern of release of individual sugars is complex and variable.

Item Type:Article
Refereed:Yes
Divisions:Faculty of Science > School of Archaeology, Geography and Environmental Science
Faculty of Life Sciences > School of Agriculture, Policy and Development > Biodiversity, Crops and Agroecosystems Division > Crops Research Group
ID Code:3399
Uncontrolled Keywords:Alcohol sugars Aldehyde sugars Carbohydrate analysis Defoliation Rhizodeposition Root exudates NEWLY ASSIMILATED CARBON CLOVER TRIFOLIUM-REPENS GAS-CHROMATOGRAPHY GRASSLAND SOIL AMINO-ACIDS RHIZOSPHERE PLANT LEAF HERBIVORY SEEDLINGS
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Publisher:Springer Verlag

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