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African mustard (Brassica tournefortii) germination in southern Australia

Published online by Cambridge University Press:  20 January 2017

Bhagirath S. Chauhan ,
Gurjeet Gill  and
Christopher Preston
Gurjeet Gill
Affiliation:
School of Agriculture, Food and Wine, The University of Adelaide, Roseworthy Campus, South Australia, Australia 5371
Christopher Preston
Affiliation:
School of Agriculture, Food and Wine, The University of Adelaide, Waite Campus, South Australia, Australia 5064
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Abstract

Germination of African mustard seeds collected from southern Australia was not influenced by light conditions at the optimum temperature of 20/12 C. However, seed germination was inhibited by light at the lower temperature (15/9 C). Presence of light increased the sensitivity of seeds to low temperature, as well as salt and osmotic stress. In dark conditions, seed germination was relatively unaffected at a low level of salinity (80 mM NaCl) but decreased even at 10 mM NaCl in light/dark conditions. In the dark, seed germination was unaffected up to an osmotic potential of −0.6 MPa but declined thereafter. Seeds of African mustard germinated over a broad range of pH from 4 to 10. Seed germination was stimulated by potassium nitrate (from 0.005 to 0.04 M) and gibberellic acid (0.001 M). Seedling emergence of African mustard was the greatest (51%) for seeds buried at 1 cm but no seedlings emerged from seeds placed at a depth of 5 cm. At the end of the growing season, seed decay (77 to 87%) and dormant (12 to 18%) components were similar among different seed burial depths. Information gained in this study will be important in developing a better understanding of the requirements for African mustard germination and emergence.

Keywords

African mustard, Brassica tournefortii Gouan BRATOEmergencegerminationlightosmotic potentialsalt stresstemperature
Type
Research Article
Information
Weed Science , Volume 54 , Issue 5 , October 2006 , pp. 891 - 897
Copyright
Copyright © Weed Science Society of America 

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References

Literature Cited

Benvenuti, S., Macchia, M., and Miele, S. 2001. Quantitative analysis of emergence of seedlings from buried weed seeds with increasing soil depth. Weed Sci. 49:528–535.CrossRefGoogle Scholar
Chachalis, D. and Reddy, K. N. 2000. Factors affecting Campsis radicans seed germination and seedling emergence. Weed Sci. 48:212–216.CrossRefGoogle Scholar
Chauhan, B. S., Gill, G., and Preston, C. 2006. Factors affecting seed germination of threehorn bedstraw (Galium tricornutum) in Australia. Weed Sci. 54:471–477.CrossRefGoogle Scholar
Cheam, A. H. and Code, G. R. 1995. The biology of Australian weeds 24. Raphanus raphanistrum L. Plant Prot. Q. 10:2–13.Google Scholar
Cousens, R. D., Baweja, R., Vaths, J., and Schofield, M. 1993. Comparative biology of cruciferous weeds: a preliminary study. Pages 376–380 in Proceedings of the 10th Australian and 14th Asian-Pacific Weed Conference. Brisbane, Australia: Weed Society of Queensland.Google Scholar
DiTommaso, A. 2004. Germination behavior of common ragweed (Ambrosia artemisiifolia) populations across a range of salinities. Weed Sci. 52:1002–1009.CrossRefGoogle Scholar
Fawcett, R. S. and Slife, F. W. 1978. Effects of field application of nitrate on weed seed germination and dormancy. Weed Sci. 26:594–596.CrossRefGoogle Scholar
Genstat 5 Committee. 1993. Genstat 5, Release 3 Reference Manual. Oxford, UK: Clarendon.Google Scholar
Gill, G. S. and Davidson, R. M. 2000. Weed interference. Pages 61–80 in Sindel, B. M. ed. Australian Weed Management Systems. Melbourne: R. G. and F. J. Richardson.Google Scholar
Greenway, H. and Munns, R. 1980. Mechanisms of salt tolerance in nonhalophytes. Annu. Rev. Plant Physiol. 31:149–190.CrossRefGoogle Scholar
Heap, I. 2006. The International Survey of Herbicide Resistant Weeds. www.weedscience.com.Google Scholar
Hendricks, S. B. and Taylorson, R. B. 1974. Promotion of seed germination by nitrate, nitrite, hydroxylamine and ammonium salts. Plant Physiol. 54:304–309.CrossRefGoogle ScholarPubMed
Koger, C. H., Reddy, K. N., and Poston, D. H. 2004. Factors affecting seed germination, seedling emergence, and survival of texasweed (Caperonia palustris). Weed Sci. 52:989–995.CrossRefGoogle Scholar
Mennan, H. and Ngouajio, M. 2006. Seasonal cycles in germination and seedling emergence of summer and winter populations of catchweed bedstraw (Galium aparine) and wild mustard (Brassica kaber). Weed Sci. 54:114–120.CrossRefGoogle Scholar
Michel, B. E. 1983. Evaluation of the water potentials of solutions of polyethylene glycol 8000 both in the absence and presence of other solutes. Plant Physiol. 72:66–70.CrossRefGoogle ScholarPubMed
Mohler, C. L. and Galford, A. E. 1997. Weed seedling emergence and seed survival: separating the effects of seed position and soil modification by tillage. Weed Res. 37:147–155.CrossRefGoogle Scholar
Pekrun, C., Lutman, P. J. W., and Baeumer, K. 1997. Germination behaviour of dormant oilseed rape seeds in relation to temperature. Weed Res. 37:419–431.CrossRefGoogle Scholar
Rengasamy, P. 2002. Transient salinity and subsoil constraints to dryland farming in Australian sodic soils: an overview. Aust. J. Exp. Agric. 42:351–361.CrossRefGoogle Scholar
Rollin, P. 1972. Phytochrome control of seed germination. Pages 229–257 in Mitrakos, K. and Shropshire, W. Jr. eds. Phytochrome. New York: Academic.Google Scholar
Shaw, D. R., Mack, R. E., and Smith, C. A. 1991. Redvine (Brunnichia ovata) germination and emergence. Weed Sci. 39:33–36.CrossRefGoogle Scholar
Taylor, I. N., Peters, N. C. B., Adkins, S. W., and Walker, S. R. 2004. Germination response of Phalaris paradoxa L. seed to different light qualities. Weed Res. 44:254–264.CrossRefGoogle Scholar
Taylorson, R. B. 1970. Changes in dormancy and viability of weed seeds in soils. Weed Sci. 18:265–269.CrossRefGoogle Scholar
Thanos, C. A., Georghiou, K., Douma, D. J., and Marangaki, C. J. 1991. Photoinhibition of seed germination in Mediterranean maritime plants. Ann. Bot. 68:469–475.CrossRefGoogle Scholar
Van Mourik, T. A., Stomph, T. J., and Murdoch, A. J. 2005. Why high seed densities within buried mesh bags may overestimate depletion rates of soil seed banks. J. Appl. Ecol. 42:299–305.CrossRefGoogle Scholar