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Alleviation of dormancy in annual ryegrass (Lolium rigidum) seeds by hydration and after-ripening

Published online by Cambridge University Press:  20 January 2017

Robert S. Gallagher ,
Kathryn J. Steadman  and
Andrew D. Crawford
Kathryn J. Steadman
Affiliation:
Western Australian Herbicide Resistance Initiative, School of Plant Biology, University of Western Australia, Crawley, Western Australia 6009, Australia
Andrew D. Crawford
Affiliation:
Western Australian Herbicide Resistance Initiative, School of Plant Biology, University of Western Australia, Crawley, Western Australia 6009, Australia
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Abstract

The effect of hydration (priming) treatment on dormancy release in annual ryegrass seeds from two populations was investigated. Hydration duration, number, and timing with respect to after-ripening were compared in an experiment involving 15 treatment regimens for 12 wk. Seeds were hydrated at 100% relative humidity for 0, 2, or 10 d at Weeks 1, 6, or 12 of after-ripening. Dormancy status was assessed after each hydration treatment by measuring seed germination at 12-hourly alternating 25/15 C (light/dark) periods using seeds directly from the hydration treatment and seeds subjected to 4 d postpriming desiccation. Seeds exposed to one or more hydration events during the 12 wk were less dormant than seeds that remained dry throughout after-ripening. The longer hydration of 10 d promoted greater dormancy loss than either a 2-d hydration or no hydration. For the seed lot that was most dormant at the start of the experiment, two or three rather than one hydration event or a hydration event earlier rather than later during after-ripening promoted greater dormancy release. These effects were not significant for the less-dormant seed lot. For both seed lots, the effect of a single hydration for 2 d at Week 1 or 6 of after-ripening was not manifested until the test at Week 12 of the experiment, suggesting that the hydration events alter the rate of dormancy release during subsequent after-ripening. A hydrothermal priming time model, usually used for modeling the effect of priming on germination rate of nondormant seeds, was successfully applied to dormancy release resulting from the hydration treatments.

Keywords

Annual ryegrass, Lolium rigidum GaudDormancygerminationhydrothermal timemodelingprimingweed seed
Type
Weed Biology and Ecology
Information
Weed Science , Volume 52 , Issue 6 , December 2004 , pp. 968 - 975
Copyright
Copyright © Weed Science Society of America 

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References

Literature Cited

Allen, P. S. and Meyer, S. E. 1998. Ecological aspects of seed dormancy loss. Seed Sci. Res 8:183–191.CrossRefGoogle Scholar
Allen, P. S., White, D. B., and Markhart, A. H. 1993. Germination of perennial ryegrass and annual bluegrass seed subjected to hydration-dehydration cycles. Crop Sci 33:1020–1025.Google Scholar
Beckman, J. J., Moser, L. E., Kubik, K., and Waller, S. S. 1993. Big bluestem and switchgrass establishment as influenced by seed priming. Agron. J 85:199–202.Google Scholar
Benech-Arnold, R. L., Sánchez, R. A., Forcella, F., Kruk, C. B., and Ghersa, C. M. 2000. Environmental control of dormancy in weed seed banks in soil. Field Crops Res 67:105–122.Google Scholar
Bradford, K. J. 1995. Water relations in seed germination. Pages 351–396 in Kigel, J. and Galili, G. eds. Seed Development and Germination. New York: Marcel Dekker.Google Scholar
Bradford, K. J. 2002. Applications of hydrothermal time to quantifying and modeling seed germination and dormancy. Weed Sci 50:248–260.Google Scholar
Bradford, K. J. and Haigh, A. M. 1994. Relationship between accumulation of hydrothermal time during seed priming and subsequent germination rates. Seed Sci. Res 4:63–69.Google Scholar
Chapman, R. and Asseng, S. 2001. An analysis of the frequency and timing of false break events in the Mediterranean region of Western Australia. Aust. J. Agric. Res 52:367–376.CrossRefGoogle Scholar
Dhingra, O. D. and Sinclair, J. B. 1995. Solutions to maintain constant humidity in a closed atmosphere. Pages 397–402 in Basic Plant Pathology Methods. 2nd ed. Boca Raton, FL: Lewis.Google Scholar
Ellery, A., Gallagher, R., and Dudley, S. 2003. The germination ecology of annual ryegrass. Pages 389–396 in Bradford, K. J., Come, D., Nicolas, G., and Pritchard, H. eds. The Biology of Seeds, Recent Research Advances: The 7th International Workshop on Seeds. Wallingford, UK: CABI.Google Scholar
Foley, M. E. 1994. Temperature and water status of seed affect afterripening in wild oat (Avena fatua). Weed Sci 42:200–201.CrossRefGoogle Scholar
Forcella, F., Benech Arnold, R. L., Sanchez, R., and Ghersa, C. M. 2000. Modeling seedling emergence. Field Crops Res 67:123–139.Google Scholar
González-Zertuche, L., Vazquez-Yanes, C., Gamboa, A., Sánchez-Coronado, M. E., Aguilera, P., and Orozco-Segovia, A. 2001. Natural priming of Wiganda urens seeds during burial: effects on germination, growth and protein expression. Seed Sci. Res 11:27–34.Google Scholar
Gramshaw, D. 1976. Temperature/light interactions and the effect of seed source on annual ryegrass (Lolium rigidum Gaud.) seeds. Aust. J. Agric. Res 27:779–786.CrossRefGoogle Scholar
Liu, Y. Q., Bino, R. J., van der Burg, W. J., Groot, S. P. C., and Hilhorst, H. W. M. 1996. Effects of osmotic priming on dormancy and storability of tomato (Lycopersicon esculentum Mill.) seeds. Seed Sci. Res 6:49–55.Google Scholar
McDonald, M. B. 1999. Seed deterioration: physiology, repair and assessment. Seed Sci. Technol 27:177–237.Google Scholar
Meyer, S. E., Debaene-Gill, S. B., and Allen, P. S. 2000. Using hydrothermal time concepts to model seed germination response to temperature, dormancy loss, and priming effects in Elymus elymoides . Seed Sci. Res 10:213–223.Google Scholar
Neter, J., Wasserman, W., and Kutner, M. H. 1990. Applied Linear Statistical Models. 3rd ed. Boston: Irwin. 1181 p.Google Scholar
Steadman, K. J. 2004. Dormancy release during hydrated storage in Lolium rigidum seeds is dependent on temperature, light quality and hydration status. J. Exp. Bot. In press.Google Scholar
Steadman, K. J., Bignell, G. P., and Ellery, A. J. 2003a. Field assessment of thermal after-ripening time for dormancy release prediction in Lolium rigidum seeds. Weed Res 43:458–465.CrossRefGoogle Scholar
Steadman, K. J., Crawford, A. D., and Gallagher, R. S. 2003b. Dormancy release in Lolium rigidum seeds is a function of thermal after-ripening time and seed water content. Funct. Plant Biol 30:345–352.Google Scholar
Steel, R. G. D. and Torrie, J. H. 1980. Principles and Procedures of Statistics: A Biometric Approach. 2nd ed. New York: McGraw-Hill. 633 p.Google Scholar
Tarquis, A. M. and Bradford, K. J. 1992. Prehydration and priming treatments that advance germination also increase the rate of deterioration of lettuce seeds. J. Exp. Bot 43:307–317.CrossRefGoogle Scholar
Taylor, A. G., Allen, P. S., Bennet, M. A., Bradford, K. J., Burris, J. S., and Misra, M. K. 1998. Seed enhancements. Seed Sci. Res 8:245–256.Google Scholar
Taylor, S. A. and Ashcroft, G. L. 1972. Physical Edaphology: The Physics of Irrigated and Nonirrigated Soils. San Francisco: W. H. Freeman. 533 p.Google Scholar
Valdes, V. M., Bradford, K. J., and Mayberry, K. S. 1985. Alleviation of thermodormancy in coated lettuce seeds by seed priming. Hortic. Sci 20:1112–1114.Google Scholar
Walters, C. 1998. Understanding the mechanisms and kinetics of seed aging. Seed Sci. Res 8:223–244.Google Scholar