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Relative Canopy Height Influences Wild Oat (Avena fatua) Seed Viability, Dormancy, and Germination

Published online by Cambridge University Press:  20 January 2017

Erik A. Lehnhoff ,
Zachariah J. Miller ,
Monica J. Brelsford ,
Sherry White  and
Bruce D. Maxwell
Erik A. Lehnhoff*
Affiliation:
Assistant Research Professor, Assistant Research Professor, Research Associate, Undergraduate Student, and Professor, Department of Land Resources and Environmental Sciences, Montana State University, Bozeman, Montana, 59717
Zachariah J. Miller
Affiliation:
Assistant Research Professor, Assistant Research Professor, Research Associate, Undergraduate Student, and Professor, Department of Land Resources and Environmental Sciences, Montana State University, Bozeman, Montana, 59717
Monica J. Brelsford
Affiliation:
Assistant Research Professor, Assistant Research Professor, Research Associate, Undergraduate Student, and Professor, Department of Land Resources and Environmental Sciences, Montana State University, Bozeman, Montana, 59717
Sherry White
Affiliation:
Assistant Research Professor, Assistant Research Professor, Research Associate, Undergraduate Student, and Professor, Department of Land Resources and Environmental Sciences, Montana State University, Bozeman, Montana, 59717
Bruce D. Maxwell
Affiliation:
Assistant Research Professor, Assistant Research Professor, Research Associate, Undergraduate Student, and Professor, Department of Land Resources and Environmental Sciences, Montana State University, Bozeman, Montana, 59717
*
Corresponding author's E-mail: [email protected]
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Abstract

The environment in which a plant grows (maternal environment) can affect seed viability, germination, and dormancy. We assessed the effects of maternal environment on wild oat seed viability, germination, dormancy, and pathogen infection by collecting and analyzing wild oat seed from above and below a barley canopy at three field sites in Montana. The viability of wild oat seed collected below a crop canopy was consistently less than it was for seed from the overstory but varied among sites and years. Reductions in viability because of relative canopy position ranged from 10% to 30%. Effects of position relative to crop canopy on weed seed germination/dormancy rates varied by site and suggest that the direction and magnitude of the effects of maternal environment on dormancy depend on environmental conditions. These effects may be driven by crop competition or by changes in seed pathogen pressure or both. Seven species each of fungi and bacteria were isolated from wild oat seeds. The only fungi causing reductions in seed viability (15%) was isolated from understory seeds, and several bacteria from both overstory and understory sources reduced seed germination. Results suggest that, in addition to the known weed-suppressive effects of using taller or earlier emerging varieties of crops, such crops can reduce weed spread through effects on weed seed demography because weeds growing beneath the crop canopy produce a reduced amount of viable seed that is less likely to germinate in the following year.

Keywords

Wild oat, Avena fatua L. AVEFAbarley, Hordeum vulgare LCerealscrop heightmaternal effectsmicroclimatepathogensseedbankseed decayweed demographyweed management
Type
Weed Biology and Ecology
Information
Weed Science , Volume 61 , Issue 4 , December 2013 , pp. 564 - 569
Copyright
Copyright © Weed Science Society of America 

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References

Literature Cited

Baskin, C. C. and Baskin, J. M. 1998. Seeds: Ecology, Biogeography, and Evolution of Dormancy and Germination. San Diego Academic. 666 p.Google Scholar
Beckie, H. J., Francis, A., and Hall, L. M. 2012. The biology of Canadian weeds, 27: Avena fatua L. (updated). Can. J. Plant Sci. 92:1329–1357.Google Scholar
Blackshaw, R. E. 1994. Differential competitive ability of winter wheat cultivars against downy brome. Agron. J. 86:649–654.CrossRefGoogle Scholar
Brainard, D. C., Bellinder, R. R., and DiTommaso, A. 2005. Effects of canopy shade on the morphology, phenology, and seed characteristics of Powell amaranth (Amaranthus powellii). Weed Sci. 53:175–186.Google Scholar
Brown, J. S. and Venable, D. L. 1986. Evolutionary ecology of seed-bank annuals in temporally varying environments. Am. Nat. 127:31–47.Google Scholar
Cousens, R. and Mortimer, M. 1995. Dynamics of Weed Populations. New York Press Syndicate of the University of Cambridge. 332 p.Google Scholar
Cousens, R. D., Brain, P., O'Donovan, J. T., and O'Sullivan, P. A. 1987. The use of biologically realistic equations to describe the effect of weed density and relative time of emergence on crop yield. Weed Sci. 35:720–725.Google Scholar
Dalling, J. W., Davis, A. S., Schutte, B. J., and Arnold, A. E. 2011. Seed survival in soil: interacting effects of predation, dormancy and the soil microbial community. J. Ecol. 99:89–95.Google Scholar
Davis, A. S. and Renner, K. A. 2007. Influence of seed depth and pathogens on fatal germination of velvetleaf (Abutilon theophrasti) and giant foxtail (Setaria faberi). Weed Sci. 55:30–35.Google Scholar
Foley, M. E. and Fennimore, S. A. 1998. Genetic basis for seed dormancy. Seed Sci. Res. 8:173–182.CrossRefGoogle Scholar
Fuerst, E. P., Anderson, J. V., Kennedy, A. C., and Gallagher, R. S. 2011. Induction of polyphenol oxidase activity in dormant wild oat (Avena fatua) seeds and caryopses: a defense response to seed decay fungi. Weed Sci. 59:137–144.CrossRefGoogle Scholar
Heap, I. M. 2013. International Survey of Herbicide Resistant Weeds. http://www.weedscience.com/summary/home.aspx. Accessed May 7, 2013.Google Scholar
Hilton, J. R. and Thomas, J. A. 1986. Regulation of pregerminative rates of respiration in seeds of various weed species by potassium nitrate. J. Exp. Bot. 37:1516–1524.Google Scholar
Jha, P., Norsworthy, J. K., Riley, M. B., and Bridges, W. Jr. 2010. Shade and plant location effects on germination and hormone content of Palmer amaranth (Amaranthus palmeri) seed. Weed Sci. 58:16–21.Google Scholar
Jones, H. D., Peters, N. C. B., and Holdsworth, M. J. 1997. Genotype and environment interact to central dormancy and differential expression of the VIVIPAROUS 1 homologue in embryos of Avena fatua . Plant J. 12:911–920.CrossRefGoogle Scholar
Juroszek, P. and von Tiedemann, A. 2011. Potential strategies and future requirements for plant disease management under a changing climate. Plant Pathol. 60:100–112.Google Scholar
Kegode, G. O. and Pearce, R. B. 1998. Influence of environment during maternal plant growth on dormancy of shattercane (Sorghum bicolor) and giant foxtail (Setaria faberi) seed. Weed Sci. 46:322–329.Google Scholar
Kiewnick, L. 1963. Experiments on the influence of seed-borne and soil-borne microflora on the viability of wild oat seeds (Avena fatua L.), I: the occurrence, specific composition and properties of microorganisms on wild oat seeds. Weed Res. 3:322–332.Google Scholar
Kiewnick, L. 1964. Experiments on the influence of seedborne microflora on the viability of wild oat seeds (Avena fatua L.), II: on the influence of microflora on the viability of seeds in the soil. Weed Res. 4:31–43.Google Scholar
Lehnhoff, E. A., Keith, B. K., Dyer, W. E., Peterson, R. K. D., and Menalled, F. D. 2013. Multiple herbicide resistance in wild oat (Avena fatua) and its impacts on physiology, germinability, and seed production. Agron. J. 105:854–862.Google Scholar
Luzuriaga, A. L., Escudero, A., and Perez-Garcia, F. 2006. Environmental maternal effects on seed morphology and germination in Sinapis arvensis (Cruciferae). Weed Res. 46:163–174.Google Scholar
Maxwell, B. D. and O'Donovan, J. T. 2007. Understanding weed-crop interactions to manage weed populations. Page 239 in Upadhyaya, M. K. and Blackshaw, R. E., eds. Non-Chemical Weed Management: Principles, Concepts and Technology. Cambridge, MA CABI.Google Scholar
Maxwell, B. D., Stougaard, R. N., and Davis, E. S. 1994. Bioeconomic model for optimizing wild oat management in barley. Pages 74–76 in Proceedings of the 47th Western Society of Weed Science Champaign, IL WSSA.Google Scholar
Mortensen, K. and Hsiao, A. I. 1987. Fungal infestation of seeds from 7 populations of wild oats (Avena fatua L) with different dormancy and viability characteristics. Weed Res. 27:297–304.Google Scholar
Nurse, R. E. and DiTommaso, A. 2005. Corn competition alters the germinability of velvetleaf (Abutilon theophrasti) seeds. Weed Sci. 53:479–488.Google Scholar
Pakeman, R. J., Small, J. L., and Torvell, L. 2012. Edaphic factors influence the longevity of seeds in the soil. Plant Ecol. 213:57–65.Google Scholar
Sawhney, R., Hsiao, A. I., and Quick, W. A. 1986. The influence of diffused light and temperature on seed germination of 3 genetically nondormant lines of wild oats (Avena fatua) and its adaptive significance. Can. J. Bot. 64:1910–1915.Google Scholar
Sawhney, R. and Naylor, J. M. 1982. Dormancy studies in seed of Avena fatua. 13. Influence of drought stress during seed development on duration of seed dormancy. Can. J. Bot. 60:1016–1020.Google Scholar
Sharma, M. P. and Vanden Born, W. H. 1978. The biology of Canadian weeds, 27: Avena fatua L. Can. J. Plant Sci. 58:141–157.Google Scholar
Simpson, G. M. 1990. Seed Dormancy in Grasses. New York Cambridge University Press. 297 p.Google Scholar
Venable, D. L. and Brown, J. S. 1988. The selective interactions of dispersal, dormancy and seed size as adaptations for reducing risks in variable environments. Am. Nat. 131:360–384.Google Scholar
Wagner, M. and Mitschunas, N. 2008. Fungal effects on seed bank persistence and potential applications in weed biocontrol: a review. Basic Appl. Ecol. 9:191–203.Google Scholar
Westerman, P. R., Wes, J. S., Kropff, M. J., and van der Werf, W. 2003. Annual losses of weed seeds due to predation in organic cereal fields. J. Appl. Ecol. 40:824–836.Google Scholar
Williams, M. M. II, Schutte, B. J., and So, Y. F. 2012. Maternal corn environment influences wild-proso millet (Panicum miliaceum) seed characteristics. Weed Sci. 60:69–74.Google Scholar