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Lipid concentration in the embryo–endosperm fraction of seeds of Australian tropical lowland rainforest trees: relevance to defence and dispersal

Published online by Cambridge University Press:  22 February 2007

Sarah Finkelstein  and
Peter J. Grubb
Sarah Finkelstein*
Affiliation:
Department of Plant Sciences, University of Cambridge, Downing Street, Cambridge, CB2 3EA, UK
Peter J. Grubb
Affiliation:
Department of Plant Sciences, University of Cambridge, Downing Street, Cambridge, CB2 3EA, UK
*
*Fax: +1–416–946–3886 Email: [email protected]
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Abstract

The lipid concentration (LC) of the embryo–endosperm fraction was determined for the seeds of 60 species in 22 families from an Australian tropical lowland rainforest. It was negatively related to the mass of the embryo–endosperm across all species, but the relationship was not significant at P < 0.05. LC was significantly and positively correlated with N concentration when all species were considered, but not within the families represented by the most species (Lauraceae, 13; Sapindaceae, 9; Proteaceae, 6). LC was significantly and markedly higher in more heavily defended seeds (medians: 27 and 6.9%); there is evidence for the view that seeds rich in either lipid or nitrogen are markedly defended. Lipid concentration was also markedly higher, on average, in seeds taken by the scatter-hoarding Uromys caudimaculatus (white-tailed rat) than in seeds of comparable size not taken by Uromys, but not known to be protected by any toxin or irritant (medians: 35 and 3.7%, respectively). However, LC was not notably high in one major group of seeds taken by Uromys – the largest-seeded species of Beilschmiedia and Endiandra (Lauraceae). The comparisons mostly involved different phyletic lines, and were not consistently supported by contrasts within phyletic lines.

Keywords

Australiadefencedispersallipid concentrationseedstropical rainforest
Type
Research Article
Information
Seed Science Research , Volume 12 , Issue 3 , September 2002 , pp. 173 - 180
Copyright
Copyright © Cambridge University Press 2002

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References

Allen, S.E. (1974) In Chemical analysis of ecological materials. pp New York, John Wiley and Sons.Google Scholar
Barclay, A.S. and Earle, F.R. (1974) Chemical analysis of seeds. III: Oil and protein content of 1253 species. Economic Botany 28, 178–236.CrossRefGoogle Scholar
Bewley, J.D. and Black, M. (1994) In Seeds. Physiology of development and germination. pp (2nd edition). New York, Plenum Press.CrossRefGoogle Scholar
Christie, W.W. (1982) Lipid analysis: Isolation, separation, identification, and structural analysis of lipids. (2nd edition). Oxford, Pergamon Press.Google Scholar
Cooper, W. and Cooper, W.T. (1994) In Fruits of the rainforest. pp Chatswood, GEO.Google Scholar
Dowsett-Lemaire, F. (1988) Fruit choice and seed dissemination by birds and mammals in the evergreen forests of upland Malawi. Revue d'Ecologie (Terre et Vie) 43, 251–285.Google Scholar
Gautier-Hion, A., Duplantier, J.-M., Quris, R., Feer, F., Sourd, C., Decoux, J.-P., Dubost, G., Emmons, L., Erard, C., Hecketsweiler, P., Moungazi, A., Roussilhon, C. and Thiollay, J.-M. (1985) Fruit characters as a basis for fruit choice and seed dispersal in a tropical forest vertebrate community. Oecologia 65, 324–337.CrossRefGoogle Scholar
Grubb, P.J. (1996) Rainforest dynamics: the need for new paradigms. pp 215–233. Edwards, D.S., Booth, W.E. and Choy, S.C. (Eds) Tropical rainforest research – current issues. Dordrecht, Kluwer.CrossRefGoogle Scholar
Grubb, P.J. and Burslem, D.F.R.P. (1998) Mineral nutrient concentrations as a function of seed size within seed crops: implications for competition among seedlings and defence against herbivory. Journal of Tropical Ecology 14, 177–185.CrossRefGoogle Scholar
Grubb, P.J. and Coomes, D.A. (1997) Seed mass and nutrient content in nutrient-starved tropical rainforest in Venezuela. Seed Science Research 7, 269–280.CrossRefGoogle Scholar
Grubb, P.J., Metcalfe, D.J., Grubb, E.A.A. and Jones, G.D. (1998) Nitrogen-richness and protection of seeds in Australian tropical rainforests: a test of plant defence theory. Oikos 82, 467–482.CrossRefGoogle Scholar
Harrington, G.N., Irvine, A.K., Crome, F.H.J. and Moore, L.A. (1997) Regeneration of large-seeded trees in Australian rainforest fragments: a study of higher-order interactions. pp 292–303. [Laurance, W.F. and Biergaard, R.O. (Eds). Tropical forest remnants. Chicago, University of Chicago Press.Google Scholar
Henderson, R.J.F. (1997) Queensland vascular plants: names and distribution. pp Indooroopilly, Queensland Government Department of Environment.Google Scholar
Hyland, B.P.M. and Whiffin, T. (1993) In Australian tropical rainforest trees. pp Vol. 2. Melbourne, CSIRO.Google Scholar
Ichie, T., Ninomiya, I. and Ogino, K. (2001) Utilization of seed reserves during germination and early seedling growth by Dryobalanops lanceolata (Dipterocarpaceae). Journal of Tropical Ecology 17, 371–378.CrossRefGoogle Scholar
Kitajima, K. (1996) Cotyledon functional morphology, patterns of seed reserve utilization and regeneration niches of tropical tree seedlings. pp 193–210. Swaine, M.D.The ecology of tropical forest tree seedlings. Paris, UNESCO.Google Scholar
Levin, D.A. (1974) The oil content of seeds: an ecological perspective. American Naturalist 108, 193–206.CrossRefGoogle Scholar
Mayer, A.M. and Poljakoff-Mayber, A. (1989) The germination of seeds. pp (4th edition). Oxford, Pergamon Press.Google Scholar
Pate, J.S., Rasins, E., Rullo, J. and Kuo, J. (1986) Seed nutrient reserves of Proteaceae with special reference to protein bodies and their inclusions. Annals of Botany 57, 747–770.CrossRefGoogle Scholar
Stapanian, M.A. (1986) Seed dispersal by birds and squirrels in the deciduous forests of the United States. pp 225–236. Estrada, A. and Fleming, T.H. (Eds) Frugivores and fruit dispersal. Dordrecht, Junk.CrossRefGoogle Scholar
Watts, C.H. and Aslin, H.J. (1981) In The rodents of Australia. Sydney, Angus and Robertson.Google Scholar