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Role of the pigmented seed coat of proso millet (Panicum miliaceum L.) in imbibition, germination and seed persistence

Published online by Cambridge University Press:  19 September 2008

Mumtaz Khan ,
Paul B. Cavers ,
Marguerite Kane  and
Ken Thompson
Mumtaz Khan
Affiliation:
NERC Unit of Comparative Plant Ecology, Department of Animal and Plant Sciences, The University, Sheffield S10 2TN, UK
Paul B. Cavers
Affiliation:
Department of Plant Sciences, University of Western Ontario, 1151 Richmond St N, London, Ontario, N6A 5B7, Canada
Marguerite Kane
Affiliation:
Department of Plant Sciences, University of Western Ontario, 1151 Richmond St N, London, Ontario, N6A 5B7, Canada
Ken Thompson*
Affiliation:
NERC Unit of Comparative Plant Ecology, Department of Animal and Plant Sciences, The University, Sheffield S10 2TN, UK
*
*Correspondence
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Abstract

Proso millet (Panicum miliaceum L.) is both a crop and a weed in many parts of the world. The weedy biotypes exhibit a wide range of seed colours, but the strains with the most persistent seeds are distinguished by darker seeds. This paper compares the seed biology of a range of biotypes from Canada and demonstrates that darker seeds have heavier seed coats, imbibe and germinate more slowly, and suffer less imbibition damage (measured as electrolyte leakage). It is concluded that all these attributes contribute to the increased persistence in the soil of the dark-seeded weedy biotypes. Imbibition damage is widely implicated in poor emergence and low vigour of crop seeds, but has not previously been considered in the context of weed seed persistence.

Keywords

seed bankweedseed coatproso millet (Panicum miliaceum L.)imbibitiongerminationseed persistence
Type
Physiology
Information
Seed Science Research , Volume 7 , Issue 1 , March 1997 , pp. 21 - 26
Copyright
Copyright © Cambridge University Press 1997

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References

Benech Arnold, R.L., Fenner, M. and Edwards, P.J. (1992) Changes in dormancy level in Sorghum halepense seeds induced by water stress during seed development. Functional Ecology 6, 596–605.CrossRefGoogle Scholar
Bough, M., Colosi, J.C. and Cavers, P.B. (1986) The major weedy biotypes of proso millet (Panicum miliaceum) in Canada. Canadian Journal of Botany 64, 1188–1198.CrossRefGoogle Scholar
Cavers, P.B. (1985) Intractable weeds — intraspecific variation must be considered in formulating control measures. pp 367–376in 1985 British Crop Protection Conference — Weeds.Google Scholar
Cavers, P.B. and Bough, M.A. (1985) Proso millet (Panicum miliaceum L.) — a crop and a weed. pp 143–155in White, J. (Ed.) Studies on plant demography: a Festschrift for John L. Harper. London, Academic Press.Google Scholar
Cavers, P.B., Kane, M. and O'Toole, J.J. (1992) Importance of seedbanks for establishment of newly introduced weeds — a case study of proso millet (Panicum miliaceum L.). Weed Science 40, 630–635.CrossRefGoogle Scholar
Dekker, J.H., McLaren, R.D., O'Toole, J.J. and Colosi, J.C. (1981) Proso millet. Ontario Ministry of Agriculture Food Factsheet No. 81–067.Google Scholar
Doersch, R.E. and Harvey, R.G. (1979) Wild proso millet in corn. Proceedings North Central Weed Control Conference 34, 58–59.Google Scholar
Hendry, G.A.F. and Grime, J.P. (1993) Methods in comparative plant ecology. London, Chapman & Hall.CrossRefGoogle Scholar
Hendry, G.A.F., Thompson, K., Moss, C.J., Edwards, E. and Thorpe, P.C. (1994) Seed persistence: a correlation between seed longevity in the soil and ortho-dihydroxyphenol concentration. Functional Ecology 8, 658–664.CrossRefGoogle Scholar
Hunt, R., Neal, A.M., Laffarga, J., Montserrat-Marti, G., Stockey, A. and Whitehouse, J. (1993) Mean relative growth rate. pp 98–101in Hendry, G. A. F., Grime, J. P. (Eds) Methods in Comparative Plant Ecology. London, Chapman & Hall.Google Scholar
Kannenberg, L.W. and Allard, R.W. (1964) An association between pigment and lignin formation in the seed coat of the lima bean. Crop Science 4, 621–622.Google Scholar
Legesse, N. and Powell, A.A. (1992) Comparisons of water uptake and imbibition damage in eleven cowpea cultivars. Seed Science and Technology 20, 173–180.Google Scholar
Morris, J.L., Campbell, W.F. and Wiebe, H.H. (1968) A refractometric method for testing seed coat permeability. Agronomy Journal 60, 79–80.CrossRefGoogle Scholar
Powell, A.A., Oliveirra, M. de A. and Matthews, S. (1986) Seed vigour in cultivars of dwarf French bean (Phaseolus vulgaris, L.) in relation to the colour of the testa. Journal of Agricultural Science 106, 419–425.CrossRefGoogle Scholar
Thompson, K. (1987) Seeds and seed banks. New Phytologist 106 (suppl.), 23–34.CrossRefGoogle Scholar
Thompson, K., Band, S.R. and Hodgson, J.G. (1993) Seed size and shape predict persistence in soil. Functional Ecology 7, 236–241.CrossRefGoogle Scholar
Wilkins, D. and Robertson, L. (1981) Proso millet: threat to continuous corn. Country Guide, 100 (10), S–12, S–14, S–15.Google Scholar
Wyatt, J.E. (1977) Seed coat and water absorption properties of seeds of near-isogenic snap bean lines differing in seed coat color. Journal of the American Society for Horticultural Science 102, 478–480.CrossRefGoogle Scholar