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Scaling of soil water absorption by seeds: an experiment using seed analogues

Published online by Cambridge University Press:  22 February 2007

Kihachiro Kikuzawa  and
Hiromasa Koyama
Kihachiro Kikuzawa*
Affiliation:
Centre for Ecological Research, Kyoto University, Sakyoku, Kyoto, Japan 606–8502
Hiromasa Koyama
Affiliation:
Hokkaido Forest Research Institute, Bibai, Hokkaido, Japan 079–01
*
*Correspondence Fax: 81 75 753 4253 Email: kikuzawa@ecology.kyoto-u.ac.jp
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Abstract

Scaling of water absorption and water loss by seeds on various soil surfaces was simulated using seed analogues constructed with paper pulp. Three sizes of analogue seeds (large, medium and small) were laid on three types of soil surface (coarse, medium and fine texture). To estimate the amount of water absorbed by a seed during a fixed time interval, the difference in seed weight from the start of the experiment was used. The scaling of water absorption necessary for germination was also studied using actual seeds of 14 species representing a range of seed sizes. Scaling coefficients between the amount of absorbed water by an analogue seed (net water gain) and seed mass were usually lower than 1: small seeds absorbed water more rapidly than large ones. The water loss of analogue seeds was also correlated with seed mass with a scaling coefficient lower than 1, but the amount of water loss itself was far smaller than the absorption. On the other hand, the germination of actual seeds revealed that the amount of water necessary to start germination was proportional to seed mass. Thus, smaller seeds have an advantage over larger seeds in more rapidly attaining the water content necessary for germination. Moreover, small seeds can penetrate through small cracks in the soil surface and thus enjoy a double advantage in a microsite that promotes water absorption and minimizes desiccation.

Keywords

analogue seedgerminationwater absorption by seedswater balance of seedswater loss from seed
Type
Research Article
Information
Seed Science Research , Volume 9 , Issue 2 , February 1999 , pp. 171 - 178
Copyright
Copyright © Cambridge University Press 1999

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References

Augspurger, C.K. (1984) Seedling survival of tropical tree species: Interactions of dispersal distance, light gaps and pathogens. Ecology 65, 1705–1712.CrossRefGoogle Scholar
Baker, H.G. (1972) Seed weight in relation to environmental conditions in California. Ecology 53, 997–1010.CrossRefGoogle Scholar
Black, J.N. (1956) The influence of seed size and depth of sowing on pre-emergence and early vegetative growth of subterranean clover (Trifolium subterraneum L.). Australian Journal of Agricultural Research 7, 98–109.CrossRefGoogle Scholar
Black, J.N. (1958) Competition between plants of different initial seed size in swards of subterranean clover (Trifolium subterraneum L.) with particular reference to leaf area and the light microclimate. Australian Journal of Agricultural Research 9, 299–318.CrossRefGoogle Scholar
Foster, S.A. (1986) On the adaptive value of large seeds for tropical moist forest trees: a review and synthesis. Botanical Review 52, 260–299.CrossRefGoogle Scholar
Foster, S.A. and Janson, C.H. (1985) The relationship between seed size and establishment conditions in tropical woody plants. Ecology 66, 773–780.CrossRefGoogle Scholar
Geritz, S.A.H. (1995) Evolutionarily stable seed polymorphism and small-scale spatial variation in seedling density. American Naturalist 146, 685–707.CrossRefGoogle Scholar
Grime, J.P. and Jeffery, D.W. (1965) Seedling establishment in vertical gradients of sunlight. Journal of Ecology 53, 621–642.CrossRefGoogle Scholar
Gross, K.L. (1984) Effects of seed size and growth form on seedling establishment of six monocarpic perennial plants. Journal of Ecology 72, 369–387.CrossRefGoogle Scholar
Harper, J.L. and Benton, R.A. (1966) The behaviour of seeds in soil. II. The germination of seeds on the surface of a water supplying substrate. Journal of Ecology 54, 151–166.CrossRefGoogle Scholar
Harper, J.L., Williams, J.T. and Sagar, G.R. (1965) The behaviour of seeds in soil. I. The heterogeneity of soil surfaces and its role in determining the establishment of plants from seed. Journal of Ecology 56, 273–286.CrossRefGoogle Scholar
Harper, J.L., Lowell, P.H. and Moore, K.G. (1970) The shapes and sizes of seeds. Annual Review of Ecology and Systematics 1, 327–356.CrossRefGoogle Scholar
Hegde, S.G., Lokesha, R. and Ganeshaiah, K.N. (1991) Seed size distribution in plants: an explanation based on fractal geometry. Oikos 62, 100–101.CrossRefGoogle Scholar
Hendrix, S., Nielsen, E., Nielsen, T. and Schutt, M. (1991) Are seedlings from small seeds always inferior to seedlings from large seeds? Effects of seed biomass on seedling growth in Pastinaca sativa L. New Phytologist 119, 299–305.CrossRefGoogle ScholarPubMed
Howe, H.F. and Smallwood, J. (1982) Ecology of seed dispersal. Annual Review of Ecology and Systematics 13, 201–228.CrossRefGoogle Scholar
Hughes, L., Dunlop, M., French, K., Leishman, M.R., Rice, B., Rodgerson, L. and Westoby, M. (1994) Predicting dispersal spectra: a minimal set of hypotheses based on plant attributes. Journal of Ecology 82, 933–950.CrossRefGoogle Scholar
Leishman, M.R. and Westoby, M. (1994) The role of large seed size in shaded conditions: experimental evidence. Functional Ecology 8, 205–214.CrossRefGoogle Scholar
Leishman, M.R., Westoby, M. and Jurado, E. (1995) Correlates of seed size variation: a comparison among five temperate floras. Journal of Ecology 83, 517–530.CrossRefGoogle Scholar
Mazer, S.J. (1989) Ecological, taxonomic, and life history correlates of seed mass among Indiana dune angiosperms. Ecological Monographs 59, 153–175.CrossRefGoogle Scholar
Pareja, M.R. and Staniforth, D.W. (1985) Seed-soil microsite characteristics in relation to weed seed germination. Weed Science 33, 190–195.CrossRefGoogle Scholar
Peart, M.H. (1981) Further experiments on the biological significance of the morphology of seed-dispersal units in grasses. Journal of Ecology 69, 425–436.CrossRefGoogle Scholar
Sakai, S. and Sakai, A. (1995) Flower size-dependent variation in seed size: theory and a test. American Naturalist 145, 918–934.CrossRefGoogle Scholar
Salisbury, E. (1942) The reproductive capacity of plants. London, Bell and Sons.Google Scholar
Seiwa, K. and Kikuzawa, K. (1991) Phenology of tree seedlings in relation to seed size. Canadian Journal of Botany 69, 532–538.CrossRefGoogle Scholar
Stanton, M.L. (1984) Seed variation in wild radish: effect of seed size on components of seedling and adult fitness. Ecology 65, 1105–1112.CrossRefGoogle Scholar
Venable, D.L. (1992) Size-number trade-offs and the variation of seed size with plant resource status. American Naturalist 140, 287–304.CrossRefGoogle Scholar
Westoby, M. and Rice, B. (1982) Evolution of the seed plants and inclusive fitness of plant tissues. Evolution 36, 713–724.CrossRefGoogle ScholarPubMed
Westoby, M., Jurado, E. and Leishman, M. (1992) Comparative evolutionary ecology of seed size. Trends in Ecology and Evolution 7, 368–372.CrossRefGoogle ScholarPubMed
Winn, A.A. (1985) Effects of seed size and microsite on seedling emergence of Prunella vulgaris in four habitats. Journal of Ecology 73, 831–840.CrossRefGoogle Scholar