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Burial conditions affect light responses of Datura ferox seeds

Published online by Cambridge University Press:  19 September 2008

Javier F. Botto ,
Rodolfo A. Sánchez  and
Jorge J. Casal
Javier F. Botto*
Affiliation:
IFEVA, Departamento de Ecologia, Facultad de Agronomia, Universidad de Buenos Aires, Av. San Martin 4453, 1417- Buenos Aires, Argentina
Rodolfo A. Sánchez
Affiliation:
IFEVA, Departamento de Ecologia, Facultad de Agronomia, Universidad de Buenos Aires, Av. San Martin 4453, 1417- Buenos Aires, Argentina
Jorge J. Casal
Affiliation:
IFEVA, Departamento de Ecologia, Facultad de Agronomia, Universidad de Buenos Aires, Av. San Martin 4453, 1417- Buenos Aires, Argentina
*
* Fax: 541 521 1384 E-mail: botto@ifeva.edu.ar
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Abstract

The dormancy pattern of buried seeds of Datura ferox was studied by testing germination responses to red light (R), far-red light (FR) or darkness after exhumation at regular time intervals. The seeds were deeply dormant at the time of burial in winter. After three months (spring), exhumed seeds began to respond to an R pulse. Summer temperatures did not induce secondary dormancy. During winter of the second year, seed germination after an R pulse increased further; however, germination after an FR pulse or in darkness also increased and reached values close to R. Changes in seed germination after an R or an FR pulse and in darkness were studied in a factorial design experiment, combining different depths of burial (0.5, 5 and 10 cm), presence of vegetation (with or without vegetation canopies), and date of exhumation (4 or 7 months after burial). The seeds placed at 0.5 cm depth did not germinate in any light treatment. A very high sensitivity to light, indicated by the promotion of germination by an FR pulse compared to darkness, was exhibited only in seeds buried at 5 cm in a soil without vegetation. A typical R/FR reversible response was observed in seeds exhumed at 5 and 10 cm in almost all situations of burial; except in a soil without vegetation, at 10 cm depth, in late summer when even dark controls showed high germination. It is concluded that buried seeds of D. ferox are released from dormancy in two steps, the first step during the spring of the first year and the second step during the subsequent winter. This process is not obviously controlled by summer temperatures. The acquisition of a very high sensitivity to light depends on vegetation cover and depth of burial, and thus it is predicted to be affected by agricultural practices.

Keywords

buried seedsDatura feroxdormancy patternLFR (low-fluence response)light sensitivityphytochromeVLFR (very-low-fluence response)
Type
Physiology & Biochemistry
Information
Seed Science Research , Volume 8 , Issue 4 , December 1998 , pp. 423 - 429
Copyright
Copyright © Cambridge University Press 1998

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References

Ascard, J. (1994) Soil cultivation in darkness reduced weed emergence. Acta Horticulturae 372, 167–177.CrossRefGoogle Scholar
Ballaré, C.L., Scopel, A.L., Ghersa, C.M. and Sánchez, R.A. (1987) The demography of Datura ferox (L.) in soybean crops. Weed Research 27, 91–102.CrossRefGoogle Scholar
Ballaré, C.L., Scopel, A.L., Ghersa, C.M. and Sánchez, R.A. (1988) The fate of Datura ferox seeds in the soil as affected by cultivation, depth of burial and degree of maturity. Annals of Applied Biology 112, 337–345.CrossRefGoogle Scholar
Baskin, J.M. and Baskin, C.C. (1985) The annual dormancy cycle in buried weed seeds: a continuum. BioScience 35, 492–498.CrossRefGoogle Scholar
Baskin, J.M. and Baskin, C.C. (1990) Role of temperature and light in the germination ecology of buried seeds of Potentilla recta. Annals of Applied Biology 117, 611–616.CrossRefGoogle Scholar
Baskin, J.M. and Baskin, C.C. (1992) Role of temperature and light in the germination ecology of buried seeds of weedy species of disturbed forests. I. Lobelia inflata. Canadian Journal of Botany 70, 589–592.CrossRefGoogle Scholar
Benvenuti, S. and Macchia, M. (1995) Effect of hypoxia on buried weed seed germination. Weed Research 35, 343–351.CrossRefGoogle Scholar
Bewley, J. and Black, M. (1982) Physiology and biochemistry of seeds in relation with germination. Vol. 2. Berlin, Springer-Verlag.CrossRefGoogle Scholar
Botto, J.F., Sánchez, R.A. and Casal, J.J. (1995) Role of phytochrome B in the induction of seed germination by light in Arabidopsis thaliana. Journal of Plant Physiology 146, 307–312.CrossRefGoogle Scholar
Botto, J.F., Sánchez, R.A., Whitelam, G.C. and Casal, J.J. (1996) Phytochrome A mediates the promotion of seed germination by very low fluences of light and canopy shade light in Arabidopsis. Plant Physiology 110, 439–444.CrossRefGoogle ScholarPubMed
Botto, J.F., Scopel, A.L., Ballaré, C.L. and Sánchez, R.A. (1998) The effect of light during and after cultivation with different tillage implements on weed seedling emergence. Weed Science 46, 351–357.CrossRefGoogle Scholar
Bouwmeester, H.J. and Karssen, C.M. (1989) Environmental factors influencing the expression of dormancy patterns in weed seeds. Annals of Botany 63, 113–120.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
Burgos, N. and Talbert, R. (1996) Weed control and sweet corn (Zea mays var. rugosa) response in a no-till system with cover crops. Weed Science 44, 355–361.CrossRefGoogle Scholar
Casal, J.J., Sánchez, R.A., Benedetto, D. and de Miguel, L.C. (1991) Light promotion of seed germination in Datura ferox is mediated by a highly stable pool of phytochrome. Photochemistry and Photobiology 53, 249–254.CrossRefGoogle Scholar
Casal, J.J., Sánchez, R.A. and Botto, J.F. (1998) Modes of action of phytochromes. Journal of Experimental Botany 49, 127–138.Google Scholar
Courtney, A.D. (1968) Seed dormancy and field emergence in Polygonum aviculare. Journal of Applied Ecology 5, 675–684.CrossRefGoogle Scholar
Derkx, M.P.M. and Karssen, C.M. (1993) Changing sensitivity to light and nitrate but not to gibberellins regulates seasonal dormancy patterns in Sisymbrium officinale seeds. Plant, Cell and Environment 16, 469–479.CrossRefGoogle Scholar
Dyer, W.E. (1995) Exploiting weed seed dormancy and germination requirements through agronomic practices. Weed Science 43, 498–503.CrossRefGoogle Scholar
Egley, G.H. (1995) Seed germination in soil. Dormancy cycles. pp 529–543in Kigel, J, Galili, G. (Eds) Seed development and germination. New York, Marcel Dekker, Inc.Google Scholar
Froud-Williams, R.J., Drennan, D.S.H. and Chancellor, R.J. (1984) The influence of burial and dry storage upon cyclic changes in dormancy germination and response to light in seeds of various arable weeds. New Phytologist 96, 473–481.CrossRefGoogle Scholar
Jensen, P.K. (1992) First Danish experiences with photocontrol of weeds. Journal of Plant Diseases and Protection 13, 631–636.Google Scholar
Karssen, C.M. (1980/1981) Patterns of change in dormancy during burial of seeds in soil. Israel Journal of Botany 29, 65–73.Google Scholar
Karssen, C.M. (1982) Seasonal patterns of dormancy in weed seeds. pp 243–270in Khan, A.A. (Ed) The physiology and biochemistry of seed development, dormancy and germination. Amsterdam, Elsevier Biomedical Press.Google Scholar
Kruk, B.C. and Benech-Arnold, R.L. (1998) Functional and quantitative analysis of seed thermal responses in prostrate knotweed (Polygonum aviculare) and common purslane (Portulaca oleracea). Weed Science (in press).CrossRefGoogle Scholar
Little, T.M. and Hill, F.J. (1978) Agricultural experimentation. Design and analysis. New York, John Wiley and Sons.Google Scholar
Pons, T.L. (1989) Breaking of seed dormancy by nitrate as a gap detection mechanism. Annals of Botany 63, 139–143.CrossRefGoogle Scholar
Popay, A., Cox, T., Ingle, A. and Kerr, R. (1995) Seasonal emergence of weeds in cultivated soil in New Zealand. Weed Research 35, 429–436.CrossRefGoogle Scholar
Reisman-Berman, O., Kigel, J. and Rubin, B. (1991) Dormancy patterns in buried seeds of Datura ferox L. Canadian Journal of Botany 69, 173–179.CrossRefGoogle Scholar
Scopel, A.L., Ballaré, C.L. and Sánchez, R.A. (1991) Induction of extreme light sensitivity in buried weed seeds and its role in the perception of soil cultivations. Plant Cell and Environment 14, 501–508.CrossRefGoogle Scholar
Scopel, A.L., Ballaré, C.L. and Radosevich, S.R. (1994) Photostimulation of seed germination during soil tillage. New Phytologist 126, 145–152.CrossRefGoogle Scholar
Shinomura, T., Nagatani, A., Hanzawa, H., Kubota, M., Watanabe, M. and Furuya, M. (1996) Action spectra for phytochrome A- and B-specific photoinduction of seed germination in Arabidopsis thaliana. Proceedings of the National Academy of Sciences, USA 93, 8129–8133.CrossRefGoogle ScholarPubMed
Sokal, R.R. and Rohlf, F.J. (1969) Biometry. San Francisco, Freeman & Company.Google Scholar
Soriano, A., Sánchez, R.A. and de Eilberg, B.A. (1964) Factors and processes in the germination of Datura ferox L. Canadian Journal of Botany 42, 1189–1203.CrossRefGoogle Scholar
Soriano, A., de Eilberg, B.A. and Suero, A. (1971) Effects of burial and changes of depth in the soil on seeds of Datura ferox. Weed Research 11, 196–199.CrossRefGoogle Scholar
Taylorson, R.B. (1972) Phytochrome controlled changes in dormancy and germination of buried weed seeds. Weed Science 20, 417–422.CrossRefGoogle Scholar
Teasdale, J.R., Beste, C.E. and Potts, W.E. (1991) Response of weeds to tillage and cover crop residue. Weed Science 39, 195–199.CrossRefGoogle Scholar
van Esso, M., Ghersa, C. and Soriano, A. (1986) Cultivation effects on the dynamics of a Johnson grass seed population in the soil profile. Soil Tillage Research 6, 325–335.CrossRefGoogle Scholar
Vleeshouwers, L.M., Bouwmeester, H.J. and Karssen, C.M. (1995) Redefining seed dormancy: an attempt to integrate physiology and ecology. Journal of Ecology 83, 1031–1037.CrossRefGoogle Scholar
Yenish, J.P., Doll, J.D. and Buhler, D.D. (1992) Effects of tillage on vertical distribution and viability of weed seed in soil. Weed Science 40, 429–433.CrossRefGoogle Scholar