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Germination ecophysiology of bur beggarticks (Bidens tripartita) as affected by light and oxygen

  • Stefano Benvenuti (a1) and Mario Macchia (a2)

Abstract

Laboratory experiments were conducted to determine the effect of light, oxygen, and submergence on bur beggarticks seed germination. Fresh and dry stored seeds exhibited dormancy, requiring thiourea and light for germination. Red light was more effective than far-red or blue light in breaking dormancy. Both an oxygen-saturated and anoxic atmosphere completely inhibited germination. Hypoxic conditions (5 and 10% oxygen) led to an increase in germination compared to normoxia (21% oxygen). Primary dormancy was eliminated by 1 yr of soil burial. Seeds exhumed after soil burial had greater germination percentage than fresh or lab-stored seeds after a brief far-red irradiation, but did not germinate in the dark. The induction of secondary dormancy increased with increasing durations of submergence. Finally, sowing at different soil depths (0 to 8 cm) showed that germination and emergence occurred mainly with shallow burial (0.5 to 1.0 cm).

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Al-Ani, B. F., Raymond, P., Saint-Ges, V., Leblanc, J. M., and Pradet, A. 1985. Germination, respiration and adenilate energy charge of seeds at various oxygen partial pressures. Plant Physiol. 79: 885890.
Alm, D. M., Stoller, E. W., and Wax, L. M. 1993. An index model for predicting seed germination and emergence rates. Weed Technol. 7: 560561.
Amritphale, D., Gutch, A., and Hsiao, A. 1995. Phytochrome-mediated germination control of Hygropbila auricolata seeds following dry storage augmented by temperature pulse, hormones, anaerobiosis or osmoticum imbibition. Environ. Exp. Bot. 35: 187192.
Anonymous. 1985. International rules for seed testing. Seed Sci. & Technol. 13: 464483.
Ballarè, C. L., Scopol, A. L., Sànchez, R. A., and Radosevich, S. R. 1992. Photomorphogenic processes in the agricultural environment. Photochem. Photobiol. 56: 777788.
Baskin, J. M. and Baskin, C. C. 1985. The annual dormancy cycle in buried weed seeds: a continuum. Bioscience 35: 492498.
Benvenuti, S. 1995. Soil light penetration and dormancy of Jimsonweed (Datura stramonium L.) seeds. Weed Sci. 43: 389393.
Benvenuti, S. and Lercari, B. 1994. Effect of canopy light environment during seed ripening on Datura stramonium L. seed germination. Agric. Medit. 124: 8691.
Benvenuti, S. and Macchia, M. 1995. Effect of hypoxia on buried weed seed germination. Weed Res. 35: 343351.
Benvenuti, S. and Macchia, M. 1997. Eight environment, phytochrome and germination of Datura stramonium (L.) seeds. Environ. Exp. Bot. In press.
Botha, F. C., Potgieter, G. P., and Botha, A. M. 1992. Respiratory metabolism and gene expression during seed germination. Plant Growth Reg. 11: 211224.
Bouwmeester, H. J. and Karssen, C. M. 1989. Environmental factors influencing the expression of dormancy pattern in weed seeds. Ann. Bot. 63: 113120.
Bradow, J. M. 1985. Germination promotion in dormant Shepherdspurse (Capsella bursa-pastoris) seeds by strigol analogs and other stimulants. Weed Sci. 34: 17.
De Miguel, L. C. and Soriano, A. 1974. The breakage of dormancy in Datura ferox seeds as an effect of water absorption. Weed Res. 14: 265270.
Egley, G. H. and Duke, S. O. 1985. Physiology of weed seed dormancy and germination. in Duke, S. O., ed. Weed physiology. Vol. I. Reproduction and Ecophysiology. Boca Raton, FL: CRC Press. pp. 2764.
Fenner, M. 1980. Germination test on thirty-two East African weed species. Weed Res. 20: 135138.
Fenner, M. 1985. Seed ecology. London: Chapman and Hall. 145 p.
Forcella, F. 1991. Prediction of weed seedling densities from buried seed reserves. Weed Res. 32: 2938.
Froud-Williams, R. J., Chancellor, R. J., and Drennan, D.S.H. 1984. The effects of seed burial and soil disturbance on emergence and survival of arable weeds in relation to minimal cultivation. J. Appl. Ecol. 21: 629641.
Holm, L. G., Plucknett, D. L., Pancho, J. V., and Herberger, J. P. 1977. The World&s Worst Weeds. Honolulu: The University Press of Hawaii. 391 p.
Kendrick, R. E. and Spruit, C.J.P. 1977. Phototransformations of phytochrome. Photochem. Photobiol. 26: 201214.
Kennedy, R. A., Rumpho, M. E., and Fox, T. E. 1992. Anaerobic metabolism in plants. Plant Physiol. 100: 16.
LeStrange, R. 1977. A History of Herbal Plants. London: Angus and Roberson. 263 p.
Mapes, G., Rothwell, G. W., and Haworth, M. T. 1989. Evolution of seed dormancy. Nature 337: 645646.
Mitich, L. W. 1994. Beggarticks. Weed Technol. 8: 172175.
Mohler, C. L. 1993. A model of the effects of tillage on emergence of weed seedlings. Ecol. Applic. 3: 5373.
Pons, T. L. 1991. Induction of dormancy in seeds: its importance for the seed bank in the soil. Func. Ecol. 5: 669675.
Qi, M. and Upadhyaya, M. K. 1993. Seed germination ecophysiology of Meadow Salsify (Tragopogon pratensis) and Western Salsify (T. dubius). Weed Sci. 41: 362367.
Refsgaard, J. C., Christensen, T. H., and Ammentorp, H. C. 1991. A model for oxygen transport and consumption in the unsaturated zone. J. Hydrol. 129: 349369.
Roberts, E. H. 1973. Oxidative processes and the control of seed germination. in Heydeker, W., ed. Seed Ecology. University Park, PA: Pennsylvania State University Press, pp. 188218.
Scopel, A. L., Bailarè, C. L., and Radosevich, S. R. 1994. Photostimulation of seed germination during soil tillage. New Phytol. 126: 145152.
Scopel, A. L., Bailarè, C. L., and Sanchez, R. A. 1991. Induction of extreme light sensitivity in buried weed seeds and its role in the perception of soil cultivation. Plant Cell Environ. 14: 501508.
Shaw, D. R., Mack, R. E., and Smith, C. A. 1991. Redvine (Brunnichia ovata) germination and emergence. Weed Sci. 39: 3336.
Thompson, K. and Grime, J. P. 1979. Seasonal variation in the seed banks of herbaceous species in ten herbaceous habitats. J. Ecol. 67: 893898.
Wilson, R. G. 1987. Biology of seeds in the soil. in Altieri, M. A. and Liebman, M., eds. Weed Management in Agroecosystems: Ecological Approaches. Boca Raton, FL: CRC Press, pp. 2539.

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