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When is the Best Time to Emerge—II: Seed Mass, Maturation, and Afterripening of Common Waterhemp (Amaranthus tuberculatus) Natural Cohorts

Published online by Cambridge University Press:  20 January 2017

Chenxi Wu  and
Micheal D. K. Owen
Chenxi Wu
Affiliation:
Graduate Student and Professor, Department of Agronomy, Iowa State University, 3218 Agronomy Hall, Ames, IA 50011
Micheal D. K. Owen*
Affiliation:
Graduate Student and Professor, Department of Agronomy, Iowa State University, 3218 Agronomy Hall, Ames, IA 50011
*
Corresponding author's E-mail: mdowen@iastate.edu
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Abstract

Field studies were conducted to determine the effect of emergence timing on the fitness of the next generation as represented by seed mass, maturation, and afterripening of common waterhemp cohorts. Five natural cohorts were documented both in 2009 and 2010. Different maternal environments resulting from varied cohort emergence timings did not influence seed maturation time and seed mass, but had an inconsistent effect on seed afterripening. Here are our major findings. (1) Waterhemp cohorts needed similar amounts of time to generate viable seeds (20 to 27 d after flower initiation) and the seeds produced were of similar size (2.0 to 2.35 g), and (2) waterhemp has strong primary dormancy that may be released within 4 mo during the afterripening process, depending on the dormancy level. Seeds produced by later cohorts were more sensitive to the afterripening period, suggesting more flexibility in life strategy. Seeds from the 2009 cohorts had similar afterripening patterns; newly harvested seeds had strong primary dormancy (<10% germination), which was gradually released during dry storage and reached the maximum germination (>80%) rate 4 mo after harvest (MAH). However, germination then dropped to 40% 6 and 8 MAH, suggesting the induction of secondary seed dormancy. Strong primary dormancy at harvest for 2010 seeds was sustained in dry afterripening, perhaps because of higher dormancy level, which was the result of less-favorable parental environments brought by 10 to 30 times higher population densities and 2.5 to 5 times higher accumulative precipitation than in 2009 (see Wu and Owen 2014). We also tested the soil seed-bank seed population densities for each waterhemp cohort and found that early cohorts greatly influenced the seed population densities at the soil surface level and the turnover rate of the soil seed bank. Results from this research will provide insights into better management of waterhemp, targeting a better understanding of the seed bank.

Keywords

Common waterhemp, Amaranthus tuberculatus (Moq.) SauerCommon waterhempseed afterripeningseed massseed maturation
Type
Weed Biology and Ecology
Information
Weed Science , Volume 63 , Issue 4 , December 2015 , pp. 846 - 854
Copyright
Copyright © Weed Science Society of America 

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Footnotes

Current address: Department of Crop Science, University of Illinois, Urbana, IL 61801.

Associate Editor for this paper: William Vencill, University of Georgia.

References

Literature Cited

Alexander, HM, Wulff, R (1985) Experimental ecological genetics in Plantago. X. The effects of maternal temperatures on seed and seedling characters in Plantago lanceolata . J Ecol 73:219–234 Google Scholar
Allen, PS, Meyer, SE (2002) Ecology and ecological genetics of seed dormancy in downy brome. Weed Sci 50:241–247 Google Scholar
Armstrong, DP, Westoby, M (1993) Seedlings from large seeds tolerate defoliation better: a test using phylogenetically independent contrasts. Ecology 74:1092–1100 Google Scholar
Baskin, CC, Baskin, JM (1998) Seeds: Ecology, Biogeography, and Evolution of Dormancy and Germination. San Diego, CA Academic Press, 666 pGoogle Scholar
Baskin, JM, Baskin, CC (1985) The Annual Dormancy Cycle in Buried Weed Seeds—A Continuum. Bioscience 35:492–498 Google Scholar
Baskin, JM, Baskin, CC (2004) A classification system for seed dormancy. Seed Sci Res 14:1–16 Google Scholar
Bell, MS, Tranel, PJ (2010) Time requirement from pollination to seed maturity in waterhemp (Amaranthus tuberculatus). Weed Sci 58:167–173 Google Scholar
Bensch, CN, Horak, MJ, Peterson, D (2003) Interference of redroot pigweed (Amaranthus retroflexus), Palmer amaranth (A.palmeri), and common waterhemp (A. rudis) in soybean. Weed Sci 51:37–43 Google Scholar
Brainard, DC, Bellinder, RR (2004) Assessing variability in fecundity of Amaranthus powelli using a simulation model. Weed Res 44:203–217 Google Scholar
Brainard, DC, Bellinder, RR, 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
Buckley, RC (1982) Seed size and seedling establishment in tropical arid dunecrest plants. Biotropica 14:314–315 Google Scholar
Castro, J (1999) Seed mass versus seedling performance in Scots pine: a maternally dependent trait. New Phytol 144:153–161 Google Scholar
Contreras, S, Tay, D, Bennett, M (2008) Effects of day-length during seed development in lettuce (Lactuca sativa L). Acta Hortic 771:103–108 Google Scholar
Cristaudo, A, Gresta, F, Luciani, F, Restuccia, A (2007) Effects of after-harvest period and environmental factors on seed dormancy of Amaranthus species. Weed Res 47:327–334 Google Scholar
El-Keblawy, A, Al-Ansari, F (2000) Effect of site of origin, time of seed maturation and seed age on germination behavior of Portulaca oleracea L. from old and new world. Can J Bot 78:279–287 Google Scholar
Eslami, SV, Gill, GS, McDonald, G (2010) Effect of water stress during seed development on morphometric characteristics and dormancy of wild radish (Raphanus raphanistrum L.) seeds. Int J Plant Prod 4:159–168 Google Scholar
Faccini, D, Vitta, JI (2005) Germination characteristics of Amaranthus quitensis as affected by seed production date and duration of burial. Weed Res 45:371–378 Google Scholar
Fenner, M (1991) The effects of the parent environment on seed germinability. Seed Sci Res 1:75–84 Google Scholar
Foley, ME (1994) Temperature and water status of seed affect afterripening in wild oat (Avena Fatua). Weed Sci 42:200–204 Google Scholar
Gressel, J, Segel, LA (1990) Modelling the effectiveness of herbicide rotations and mixtures as strategies to delay or preclude resistance. Weed Technol 4:186–198 Google Scholar
Grime, JP, Jeffrey, DW (1965) Seedling establishment in vertical gradients of sunlight. J Ecol 53:621–642 Google Scholar
Gutterman, Y (2000) Maternal effects on seeds during development. Pages 59–84 in Fenner M, ed. Seeds; the Ecology of Regeneration in Plant Communities. Wallingford, UK CABI Publishing Google Scholar
Hager, AG, Wax, LM, Stoller, EW, Bollero, GA (2002) Common waterhemp (Amaranthus rudis) interference in soybean. Weed Sci 50:607–610 Google Scholar
Hartzler, RG, Bruce, B, Nordby, D (2004) Effect of common waterhemp (Amaranthus rudis) emergence date on growth and fecundity in soybean. Weed Sci 52:242–245 Google Scholar
Hodkinson, DJ, Askew, AP, Thompson, K, Hodgson, JG, Bakker, JP, Bekker, RM (1998) Ecological correlates of seed size in the British flora. Funct Ecol 12:762–766 Google Scholar
Jurado, E, Flores, J (2005) Is seed dormancy under environmental control or bound to plant traits? J Veg Sci 16:559–564 Google Scholar
Karimmojeni, H, Bazrafshan, AH, Majidi, MM, Torabian, S, Rashidi, B (2014) Effect of maternal nitrogen and drought stress on seed dormancy and germinability of Amaranthus retroflexus . Plant Spec Biol 29:1–8 Google Scholar
Kepczyński, J, Bihun, M (2002) Induction of secondary dormancy in Amaranthus caudatus seeds. Plant Growth Regul 38:135–140 Google Scholar
Krannitz, PG, Aarssen, LW, Dow, JM (1991) The effect of genetically based differences in seed size on seedling survival in Arabidopsis-Thaliana (Brassicaceae). Am J Bot 78:446–450 Google Scholar
Leishman, MR, Wright, IJ, Moles, AT, Westoby, M (2000) The evolutionary ecology of seed size. Pages 31–57 in Fenner, M., ed. Seeds; the Ecology of Regeneration in Plant Communities. Wallingford, UK CABI Publishing Google Scholar
Leon, RG, Bassham, DC, Owen, MDK (2006) Germination and proteome analyses reveal intraspecific variation in seed dormancy regulation in common waterhemp (Amaranthus tuberculatus). Weed Sci 54:305–315 Google Scholar
Leon, RG, Owen, MDK (2006) Tillage systems and seed dormancy effects on common waterhemp (Amaranthus tuberculatus) seedling emergence. Weed Sci 54:1037–1044 Google Scholar
Mulugeta, D, Stoltenberg, DE (1998) Influence of cohorts on Chenopodim album demography. Weed Sci 46:65–70 Google Scholar
Norden, N, Daws, MI, Antoine, C, Gonzalez, MA, Garwood, NC, Chave, J (2009) The relationship between seed mass and mean time to germination for 1037 tree species across five tropical forests. Funct Ecol 23:203–210 Google Scholar
Pedersen, BP, Neve, P, Andreasen, C, Powles, SB (2007) Ecological fitness of a glyphosate-resistant Lolium rigidum population: growth and seed production along a competition gradient. Basic Appl Ecol 8:258–268 Google Scholar
Platenkamp, GAJ, Shaw, RG (1993) Environmental and genetic maternal effects on seed characters in Nemophila-Menziesii. Evolution 47:540–555 Google Scholar
Quero, JL, Villar, R, Maranon, T, Zamora, R, Poorter, L (2007) Seed-mass effects in four Mediterranean Quercus species growing in contrasting light environments. Am J Bot 94:1795–1803 Google Scholar
Radosevich, S, Holt, J, Ghersa, C (1997) Weed Ecology: Implications for Management. New York John Wiley & Sons. 589 pGoogle Scholar
Roach, CA (1986) Timing of seed production and dispersal in Geranium carolinianum. Effects on fitness. Ecology 67:572–576 Google Scholar
Rothrock, PE, Squiers, ER, Sheeley, S (1993) Heterogeneity and size of a persistent seedbank of Ambrosia Artemisiifolia L and Setaria Faberi Herrm. B Torrey Bot Club 120:417–422 Google Scholar
Sawma, JT, Mohler, CL (2002) Evaluating seed viability by an unimbibed seed crush test in comparison with the tetrazolium test. Weed Technol 16:781–786 Google Scholar
Schutte, BJ, Davis, AS (2014) Do common waterhemp (Amaranthus rudis) seedling emergence patterns meet criteria for herbicide resistance simulation modeling? Weed Technol 28:408–417 Google Scholar
Shapiro, SS, Wilk, MB (1965) An analysis of variance test for normality (complete samples). Biometrika 52:591–611 Google Scholar
Stanisavljevic, R, Dragicevic, V, Milenkovic, J, Djukanovic, L, Djokic, D, Terzic, D, Dodig, D (2010) Short communication. Effects of the duration of after-ripening period on seed germinations and seedling size in three fescue species. Span J Agric Res 8:454–459 Google Scholar
Steckel, LE, Sprague, CL (2004) Late-season common waterhemp (Amaranthus rudis) interference in narrow- and wide-row soybean. Weed Technol 18:947–952 Google Scholar
Steckel, LE, Sprague, CL, Stoller, EW, Wax, LM, Simmons, FW (2007) Tillage, cropping system, and soil depth effects on common waterhemp (Amaranthus rudis) seed-bank persistence. Weed Sci 55:235–239 Google Scholar
Tarasoff, CS, Ball, DA, Mallory-Smith, CA (2007) Afterripening requirements and optimal germination temperatures for Nuttall's alkaligrass (Puccinellia nuttalliana) and weeping alkaligrass (Puccinellia distans). Weed Sci 55:36–40 Google Scholar
Taylor, KL, Hartzler, RG (2000) Effect of seed bank augmentation on herbicide efficacy. Weed Technol 14:261–267 Google Scholar
Tripathi, RS, Khan, ML (1990) Effects of seed weight and microsite characteristics on germination and seedling fitness in 2 species of Quercus in a subtropical wet hill forest. Oikos 57:289–296 Google Scholar
Uscanga-Mortera, E, Clay, SA, Forcella, F, Gunsolus, J (2007) Common waterhemp growth and fecundity as influenced by emergence date and competing crop. Agron J 99:1265–1270 Google Scholar
Wiles, LJ, Barlin, DH, Schweizer, EE, Duke, HR, Whitt, DE (1996) A new soil sampler and elutriator for collecting and extracting weed seeds from soil. Weed Technol 10:35–41 Google Scholar
Wu, C, Owen, MDK (2014) When is the best time to emerge: reproductive phenology and success of natural common waterhemp (Amaranthus rudis) cohorts in the Midwest United States? Weed Sci 62:107–117 Google Scholar