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Flooding induces secondary dormancy in Setaria parviflora seeds

Published online by Cambridge University Press:  01 March 2007

Federico P.O. Mollard ,
Pedro Insausti  and
Rodolfo A. Sánchez
Federico P.O. Mollard*
Affiliation:
IFEVA-CONICET, Facultad de Agronomía, UBA, Av. San Martín 4453, C1417DSE, Buenos Aires, Argentina
Pedro Insausti
Affiliation:
IFEVA-CONICET, Facultad de Agronomía, UBA, Av. San Martín 4453, C1417DSE, Buenos Aires, Argentina
Rodolfo A. Sánchez
Affiliation:
IFEVA-CONICET, Facultad de Agronomía, UBA, Av. San Martín 4453, C1417DSE, Buenos Aires, Argentina
*
*Correspondence Fax: +54 11 4514 8730 Email: [email protected]
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Abstract

The effect of flooding on the dormancy level of Setaria parviflora seeds from a non-flooded upland and a seasonally (winter–spring) flooded lowland in the Pampa grasslands of Argentina was investigated. Seeds from both communities were subjected to reciprocal burial treatments in the two habitats, and exhumed during and after the flooding season. Effect of immersion in water at 5°C was compared to incubation of seeds on the surface of water-saturated paper at the same temperature. After exhumation of the buried seeds or immersion treatments, germination was assayed at 25°C and at 20/30°C in the dark or in combination with light. Burial in the lowland, which was flooded in winter–spring, significantly reduced germination, while burial in the non-flooded upland did not reduce germination. Similarly, immersion in water at 5°C significantly reduced germination compared to non-immersed controls. During summer, seeds buried in the lowland showed increased capacity to germinate, particularly when exposed to fluctuating temperatures or light. Thus, flooding induced secondary dormancy in S. parviflora seeds, and it was broken during the non-flooding season. These responses of the seeds would prevent germination until there was no further risk of flooding. Remarkably, in S. parviflora seeds harvested from both habitats, we observed essentially the same germination requirements after flooding. However, some slight differences were detected between the seed populations exhumed from the lowland site, indicating that flooding had larger effects on the seeds from the upland community. This suggests some differentiation of these populations evident only after flooding in the field.

Keywords

floodingfluctuating temperaturesgerminationgrasslandsecondary dormancyseed dormancySetaria parviflora
Type
Research Article
Information
Seed Science Research , Volume 17 , Issue 1 , March 2007 , pp. 55 - 62
Copyright
Copyright © Cambridge University Press 2007

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References

Baskin, C.C. and Baskin, J.M. (1998) Seeds: Ecology, biogeography and evolution of dormancy and germination. San Diego, Academic Press.Google Scholar
Baskin, C.C., Baskin, J.M. and Chester, E.W. (2000) Effect of flooding on the annual dormancy cycle and on germination of seeds of the summer annual Schoenoplectus purshianus (Cyperaceae). Aquatic Botany 67, 109–116.CrossRefGoogle Scholar
Baskin, J.M. and Baskin, C.C. (1980) Ecophysiology of secondary dormancy in seeds of Ambrosia artemisiifolia. Ecology 61, 475–480.CrossRefGoogle Scholar
Batlla, D. and Benech-Arnold, R.L. (2005) Changes in the light sensitivity of buried Polygonum aviculare seeds in relation to cold-induced dormancy loss: development of a predictive model. New Phytologist 165, 445–452.CrossRefGoogle ScholarPubMed
Benech Arnold, R.L., Ghersa, C.M., Sánchez, R.A. and García Fernández, A.E. (1988) The role of fluctuating temperatures in the germination and establishment of Sorghum halepense (L.) Pers. Regulation of germination under leaf canopies. Functional Ecology 2, 311–318.CrossRefGoogle Scholar
Benech-Arnold, R.L., Sánchez, R.A., Forcella, F., Kruk, B.C. and Ghersa, C.M. (2000) Environmental control of dormancy in weed seed banks in soil. Field Crops Research 67, 105–122.CrossRefGoogle Scholar
Bouwmeester, H.J. and Karssen, C.M. (1992) The dual role of temperature in the regulation of the seasonal changes in dormancy and germination of seeds of Polygonum persicaria L. Oecologia 90, 88–94.CrossRefGoogle ScholarPubMed
Bouwmeester, H.J. and Karssen, C.M. (1993) Annual changes in dormancy and germination in seeds of Sysimbrium officinale (L.) Scop. New Phytologist 124, 179–191.CrossRefGoogle Scholar
Burkart, S.E. and Sánchez, R.A. (1969) Interaction between an inhibitor present in the seeds of Datura ferox and light in the control of germination. Botanical Gazette 130, 42–47.CrossRefGoogle Scholar
Burkart, S.E., León, R.J.C. and Movia, C.P. (1990) Inventario fitosociológico del pastizal de la depresión del Salado (Prov. Bs.As.) en un área representativa de sus principales ambientes. Darwiniana 30, 27–69.Google Scholar
Casal, J.J. and Sánchez, R.A. (1998) Phytochromes and seed germination. Seed Science Research 8, 317–329.CrossRefGoogle Scholar
Crawford, R.M.M. (2003) Seasonal differences in plant responses to flooding and anoxia. Canadian Journal of Botany 81, 1224–1246.CrossRefGoogle Scholar
D'Angela, E., Facelli, J.M. and Jacobo, E. (1988) The role of the permanent soil seed bank in early stages of a post-agricultural succession in the Inland Pampa, Argentina. Vegetatio 74, 39–45.CrossRefGoogle Scholar
Dekker, J. (2000) Emergent weedy foxtail (Setaria spp.) seed germinability behavior. pp. 411–423 in Black, M.; Bradford, K.J.; Vásquez-Ramos, J. (Eds) Seed biology: Advances and applications. Wallingford, CAB International.Google Scholar
Dekker, J. and Hargrove, M. (2002) Weedy adaptation in Setaria spp. V. Effects of gaseous environment on giant foxtail (Setaria faberii) (Poaceae) seed germination. American Journal of Botany 89, 410–416.CrossRefGoogle ScholarPubMed
Donohue, K., Dorn, L., Griffith, C., Kim, E., Aguilera, A., Polisetty, C.R. and Schmitt, J. (2005) The evolutionary ecology of seed germination of Arabidopsis thaliana: variable natural selection on germination timing. Evolution 59, 758–770.Google ScholarPubMed
Ekstam, B. and Forseby, Å. (1999) Germination response of Phragmites australis and Typha latifolia to diurnal fluctuations in temperature. Seed Science Research 9, 157–163.CrossRefGoogle Scholar
Herron, H., Clemens, J., Greer, D.H. and Greer, C. (2000) Contrasting seed germination responses to red and far-red light in Leptospermum scoparium and Melicytus ramiflorus. Australian Journal of Plant Physiology 27, 1069–1076.Google Scholar
Hilhorst, H.W.M. (1998) The regulation of secondary dormancy. The membrane hypothesis revisited. Seed Science Research 8, 77–90.CrossRefGoogle Scholar
Insausti, P., Soriano, A. and Sánchez, R.A. (1995) Effects of flood-influenced factors on seed germination of Ambrosia tenuifolia. Oecologia 103, 127–132.CrossRefGoogle ScholarPubMed
Insausti, P., Chaneton, E.J. and Soriano, A. (1999) Flooding reverted grazing effects on plant community structure in mesocosms of lowland grassland. Oikos 84, 266–276.CrossRefGoogle Scholar
Meyer, S.E., Allen, P.S. and Beckstead, J. (1997) Seed germination regulation in Bromus tectorum (Poaceae) and its ecological significance. Oikos 78, 475–485.CrossRefGoogle Scholar
Noronha, A., Andersson, L. and Milberg, P. (1997) Rate of change in dormancy level and light requirement in weed seeds during stratification. Annals of Botany 80, 795–801.CrossRefGoogle Scholar
Pons, T.L. and Schroder, H.F.J.M. (1986) Significance of temperature fluctuation and oxygen concentration for germination of the rice field weeds Fimbristylis littoralis and Scirpus juncoides. Oecologia 68, 315–319.CrossRefGoogle ScholarPubMed
Probert, R.J., Smith, R.D. and Birch, P. (1985) Germination responses to light and alternating temperatures in European populations of Dactylis glomerata L. I. Variability in relation to origin. New Phytologist 99, 305–316.CrossRefGoogle Scholar
Sokal, R.R. and Rohlf, F.J. (1969) Biometry. San Francisco, Freeman.Google Scholar
Steadman, K.J. (2004) Dormancy release during hydrated storage in Lolium rigidum seeds is dependent on temperature, light quality and hydration status. Journal of Experimental Botany 55, 929–937.CrossRefGoogle ScholarPubMed
Thompson, K. and Grime, J.P. (1983) A comparative study of germination responses to diurnally fluctuating temperatures. Journal of Applied Ecology 20, 141–156.CrossRefGoogle Scholar
Thompson, K., Grime, J.P. and Mason, G. (1977) Seed germination in response to diurnal fluctuations of temperature. Nature 267, 147–149.CrossRefGoogle ScholarPubMed