Hostname: page-component-78c5997874-m6dg7 Total loading time: 0 Render date: 2024-11-05T21:22:52.120Z Has data issue: false hasContentIssue false

Sensitivity cycling to physical dormancy break and seed vigour of two Ipomoea species (Convolvulaceae)

Published online by Cambridge University Press:  01 December 2009

K.M.G. Gehan Jayasuriya
Affiliation:
Department of Biology, University of Kentucky, Lexington, KY40506, USA
Jerry M. Baskin
Affiliation:
Department of Biology, University of Kentucky, Lexington, KY40506, USA
Dennis M. Tekrony
Affiliation:
Department of Plant and Soil Sciences, University of Kentucky, Lexington, KY40546, USA
Carol C. Baskin*
Affiliation:
Department of Biology, University of Kentucky, Lexington, KY40506, USA Department of Plant and Soil Sciences, University of Kentucky, Lexington, KY40546, USA
*
*Correspondence Fax: +1-859-257-1717 Email: [email protected]

Abstract

The physically dormant seeds of Ipomoea lacunosa and of I. hederacea undergo sensitivity cycling (insensitive ↔  sensitive) to dormancy-breaking treatment. Sensitivity cycling is important to seeds with physical dormancy in sensing appropriate environmental conditions for germination. Seed vigour is also important to seedling establishment, but no study has compared changes in vigour (or not) with changes in sensitivity. This study was conducted to determine the relationship between sensitivity cycling and seed vigour in I. lacunosa and I. hederacea. The seed moisture contents of insensitive and sensitive seeds of I. lacunosa and of sensitive seeds of I. hederacea were measured, and several vigour tests were performed. Vigour of sensitive seeds of I. lacunosa decreased more rapidly than that of insensitive seeds. No significant change in vigour was observed in either permeable or impermeable seeds of I. hederacea. We conclude that sensitivity cycling to physical dormancy break is important in maintaining vigour of I. lacunosa seeds in the soil seed-bank.

Type
Research Article
Copyright
Copyright © Cambridge University Press 2009

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Anonymous, (1995) Weed survey – Southern states, broadleaf crops subsection. Proceedings, Southern Weed Science Society 48, 290305.Google Scholar
Anonymous, (2000) Weed survey – Southern states, grass crops subsection. Proceedings, Southern Weed Science Society 53, 247274.Google Scholar
Anonymous, (2001) Weed survey – Southern states, broadleaf crops subsection. Proceedings, Southern Weed Science Society 54, 244259.Google Scholar
Baskin, C.C. (2003) Breaking physical dormancy in seeds – focusing on the lens. New Phytologist 158, 229232.CrossRefGoogle Scholar
Baskin, C.C. and Baskin, J.M. (1998) Seeds: ecology, biogeography, and evolution of dormancy and germination. San Diego, USA, Academic Press.Google Scholar
Baskin, J.M. and Baskin, C.C. (1985) The annual dormancy cycle in buried weed seeds: a continuum. BioScience 35, 492498.CrossRefGoogle Scholar
Baskin, J.M. and Baskin, C.C. (2004) A classification system for seed dormancy. Seed Science Research 14, 116.CrossRefGoogle Scholar
Baskin, J.M., Baskin, C.C. and Li, X. (2000) Taxonomy, anatomy and evolution of physical dormancy in seeds. Plant Species Biology 15, 139152.Google Scholar
Copeland, L.O. and McDonald, M.B. (2001) Principles of seed science and technology (4th edition). Boston, USA, Kluwer Academic Publications.CrossRefGoogle Scholar
Egley, G.H. and Chandler, J.M. (1983) Longevity of weed seeds after 5.5 years in the Stoneville 50-year buried-seed study. Weed Science 31, 264270.Google Scholar
Gleason, H.A. and Cronquist, A. (1991) Manual of vascular plants of northeastern United States and adjacent Canada (2nd edition). Bronx, NY, USA, The New York Botanical Garden.Google Scholar
Gomes, L.F., Chandler, J.M. and Vaughan, C.E. (1978) Aspects of emergence and seed production of three Ipomoea taxa. Weed Science 26, 245248.CrossRefGoogle Scholar
ISTA (International Seed Testing Association) (2008) International Rules for Seed Testing. Zürichstrasse, Bassersdorf, Switzerland, ISTA.Google Scholar
Jayasuriya, K.M.G.G., Baskin, J.M., Geneve, R.L. and Baskin, C.C. (2007a) Morphology and anatomy of physical dormancy in Ipomoea lacunosa: identification of the water gap in seeds of Convolvulaceae (Solanales). Annals of Botany 100, 1321.CrossRefGoogle ScholarPubMed
Jayasuriya, K.M.G.G., Baskin, J.M., Geneve, R.L. and Baskin, C.C. (2007b) Seed development in Ipomoea lacunosa (Convolvulaceae), with particular reference to anatomy of the water gap. Annals of Botany 100, 459470.CrossRefGoogle Scholar
Jayasuriya, K.M.G.G., Baskin, J.M. and Baskin, C.C. (2008a) Cycling of sensitivity to physical dormancy-break in seeds of Ipomoea lacunosa (Convolvulaceae) and ecological significance. Annals of Botany 101, 341352.Google Scholar
Jayasuriya, K.M.G.G., Baskin, J.M., Geneve, R.L., Baskin, C.C. and Chien, C.-T. (2008b) Physical dormancy in seeds of the holoparasitic angiosperm Cuscuta australis (Convolvulaceae, Cuscuteae): dormancy breaking requirements, anatomy of the water gap and sensitivity cycling. Annals of Botany 102, 3948.CrossRefGoogle ScholarPubMed
Jayasuriya, K.M.G.G., Baskin, J.M. and Baskin, C.C. (2008c) Dormancy, germination requirements and storage behavior of seeds of Convolvulaceae (Solanales) and evolutionary considerations. Seed Science Research 18, 223237.Google Scholar
Jayasuriya, K.M.G.G., Baskin, J.M. and Baskin, C.C. (2009a) Sensitivity cycling and its ecological role in seeds with physical dormancy. Seed Science Research 19, 313.CrossRefGoogle Scholar
Jayasuriya, K.M.G.G., Baskin, J.M., Geneve, R.L. and Baskin, C.C. (2009b) Sensitivity cycling and mechanism of physical dormancy break in seeds of Ipomoea hederacea (Convolvulaceae). International Journal of Plant Sciences 170, 429443.Google Scholar
Jayasuriya, K.M.G.G., Baskin, J.M., Geneve, R.L. and Baskin, C.C. (2009c) A proposed mechanism for physical dormancy break in seeds of Ipomoea lacunosa (Convolvulaceae). Annals of Botany 103, 433445.CrossRefGoogle ScholarPubMed
McDonald, M.B. (1999) Seed deterioration: physiology, repair and assessment. Seed Science and Technology 27, 177237.Google Scholar
Murthy, U.M.N., Kumar, P.P. and Sun, W.Q. (2003) Mechanisms of seed ageing under different storage conditions for Vigna radiata (L.) Wilczek: lipid peroxidation, sugar hydrolysis, Maillard reactions and their relationship to glass state transition. Journal of Experimental Botany 54, 10571067.CrossRefGoogle ScholarPubMed
Norsworthy, J.K. and Oliveira, M.J. (2007) Role of light quality and temperature on pitted morningglory (Ipomoea lacunosa) germination with after-ripening. Weed Science 55, 111118.CrossRefGoogle Scholar
Rolston, M.P. (1978) Water impermeable seed dormancy. The Botanical Review 44, 365389.Google Scholar
Taylor, G.B. (1981) Effect of constant temperature treatments followed by fluctuating temperatures on the softening of hard seeds of Trifolium subterraneum L. Australian Journal of Plant Physiology 8, 547558.Google Scholar
Taylor, G.B. (2005) Hardseededness in Mediterranean annual pasture legumes in Australia: a review. Australian Journal of Agricultural Research 56, 645661.CrossRefGoogle Scholar
Taylor, G.B. and Revell, C.K. (1999) Effect of pod burial, light, and temperature on seed softening in yellow serradella. Australian Journal of Agricultural Research 50, 12031209.CrossRefGoogle Scholar
TeKrony, D.M. (1989) Use of field and laboratory indicators in quality control. pp. 119, in Proceedings of the 19th soybean seed research conference 1989. Washington, DC, USA, American Seed Trade Association.Google Scholar
TeKrony, D.M. and Egli, D.B. (1991) Relationship of seed vigour to crop yield: a review. Crop Science 31, 816822.Google Scholar
TeKrony, D.M., Egli, D.B. and White, G.M. (1987) Seed production and technology. pp. 295353, in Soybeans: improvement, production and uses (2nd edition). Madison, Wisconsin, USA, ASA-CSSA-SSSA, Agronomy Monograph No. 16.Google Scholar
Toole, E.H. and Brown, E. (1946) Final results of the Duvel buried seed experiment. Journal of Agricultural Research 72, 201210.Google Scholar
Van Assche, J.A., Debucquoy, L.A. and Rommens, A.F. (2003) Seasonal cycles in the germination capacity of buried seeds of some Leguminosae (Fabaceae). New Phytologist 158, 315323.CrossRefGoogle Scholar