Presented at the Second International Symposium on Fructan, Aberystwyth, UK, July 1992.
Distribution of fructose polymers in herbaceous species of Asteraceae from the cerrado
Article first published online: 28 APR 2006
Volume 123, Issue 4, pages 741–749, January 1993
How to Cite
TERTULIANO, M. F. and FIGUEIREDO-RIBEIRO, R. C. L. (1993), Distribution of fructose polymers in herbaceous species of Asteraceae from the cerrado. New Phytologist, 123: 741–749. doi: 10.1111/j.1469-8137.1993.tb03785.x
- Issue published online: 28 APR 2006
- Article first published online: 28 APR 2006
- (Received 24 July 1992; accepted 21 December 1992)
- underground organs;
Underground organs of 35 herbaceous species of Asteraceae, representing 6 tribes, were collected from a restricted area of the Brazilian cerrado. Occurrence, histological location, concentration and composition of fructans were determined in thickened underground organs of 19 species in the tribes Eupatorieae, Heliantheae and Vernonieae. Spherocrystals of inulin were histologically detected in approximately 80 % of all species examined; these are distributed in the reserve parenchyma cells, particularly in the Vernonieae. In the Heliantheae and Eupatorieae they are found in the parenchyma, sometimes associated with vascular tissue. Total fructans as a proportion of dry mass range from 2.4 % in Vernonia brevifolia to 55% in Calea platylepis, regardless of the water contents of the storage organs. The highest degree of polymerization is observed in the Heliantheae. Thin-layer chromatography demonstrates that isokestose predominates throughout and that different proportions of fructo-oligosaccharides are present, depending on species.
The patterns of fructo-oligosaccharides are similar at generic and tribal levels, suggesting phylogenetic relationships within the Asteraceae.