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Factors affecting seed germination of threehorn bedstraw (Galium tricornutum) in 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

Threehorn bedstraw is an important dicotyledonous weed in southern Australia that is particularly difficult to control in pulse crops. Knowledge of the germination ecology of this weed would facilitate development of effective weed-control programs. Experiments were conducted to study the germination of two populations, Roseworthy Campus (RC) and Yorke Peninsula (YP), of threehorn bedstraw from South Australia. In the absence of chilling, seeds germinated only in the darkness. Germination was considerably higher under an alternating day/night temperature range of 13/7 C compared with 20/12 or 25/15 C day/night temperature. Germination was inhibited by light; however, when seeds were subsequently transferred to complete darkness they germinated readily. Potassium nitrate (0.005 M KNO3) and gibberellic acid (0.001 M GA3) stimulated germination in the darkness in both populations. This concentration of KNO3 increased germination of the RC and YP populations from 26 and 37% to 56 and 68%, respectively; however, higher concentrations of KNO3 inhibited germination. GA3 added in combination with KNO3 further increased germination to 81 and 94%, respectively. Germination was also promoted by cold-stratification treatment (5 C). Complete germination (100%) was achieved within 4 wk of cold stratification, when seeds were incubated in sand. In the field, seedling recruitment of both populations was higher under minimum tillage (25 to 27%) than no-till (15 to 18%) conditions, reflecting greater exposure of seeds to light under no-till systems.

Keywords

Threehorn bedstraw, Galium tricornutum Dandy, GALTCGerminationtillagelightweed seed
Type
Weed Biology and Ecology
Information
Weed Science , Volume 54 , Issue 3 , June 2006 , pp. 471 - 477
Copyright
Copyright © Weed Science Society of America 

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References

Literature Cited

Amor, R. L. and Kloot, P. M. 1987. Changes in weed flora in south-eastern Australia due to cropping and control practices. Plant Prot. Q 2:3–7.Google Scholar
Bedggood, W. 1999. Integrated Weed Management of Bedstraw. www.dpi.vic.gov.au.Google Scholar
Black, I. D., Mayfield, A., and Matic, R. 1994. Chemical control of bedstraw (Galium tricornutum Dandy) and bifora (Bifora testiculata L.) in wheat, barley and field peas. Plant Prot. Q 9:24–27.Google Scholar
Boyd, N. S. and Van Acker, R. C. 2003. The effects of depth and fluctuating soil moisture on the emergence of eight annual and six perennial plant species. Weed Sci 51:725–730.CrossRefGoogle Scholar
Department of Agriculture, Western Australia. 2005. Bedstraw Confirmed in Cereal Crops. www.agric.wa.gov.au.Google 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.Google Scholar
Froud Williams, R. J. 1985. The biology of cleavers (Galium aparine). Asp. Appl. Biol 9:189–195.Google Scholar
Genstat 5 Committee. 1993. Genstat 5, Release 3 Reference Manual. Oxford, U.K.: Clarendon.Google Scholar
Grime, J. P., Mason, G. G., Curtis, A. V., Rodman, J., and Band, S. R. 1981. A comparative study of germination characteristics in a local flora. J. Ecol 69:1017–1059.Google Scholar
Hall, L. M., Stromme, K. M., Horsman, G. P., and Devine, M. D. 1998. Resistance to acetolactase synthase inhibitors and quinclorac in a biotype of false cleavers (Galium spurium). Weed Sci 46:390–396.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.Google Scholar
Karssen, C., Groot, S., and Koornneef, M. 1987. Hormone mutants and seed dormancy in Arabidopsis and tomato. Pages 109–113 in Thomas, H. and Grierson, D. eds. Symposia of the Society for Experimental Biology, XXXII: Developmental Mutants in Higher Plants. Cambridge, U.K.: Cambridge University.Google Scholar
Karssen, C. M., Zagorski, S., Kepczynski, J., and Groot, S. P. C. 1989. Key role for endogenous gibberellins in the control of seed germination. Ann. Bot 63:71–80.Google Scholar
Malik, N. and Vanden Born, W. H. 1987a. False cleavers (Galium spurium L.) competition and control in rapeseed. Can. J. Plant Sci 67:839–844.CrossRefGoogle Scholar
Malik, N. and Vanden Born, W. H. 1987b. Germination response of Galium spurium L. to light. Weed Res 27:251–258.Google Scholar
Malik, N. and Vanden Born, W. H. 1988. The biology of Canadian weeds. 86. Galium aparine L. and Galium spurium L. Can. J. Plant Sci 68:481–499.Google Scholar
Mennan, H. 2003. The effects of depth and duration of burial on seasonal germination, dormancy and viability of Galium aparine and Bifora radians seeds. J. Agron. Crop Sci 189:304–309.Google Scholar
Moerkerk, M. R. 1999. Chemical control of bedstraw (Galium tricornutum Dandy) in wheat, barley, field peas, chickpeas and faba beans in southern Australia. Plant Prot. Q 14:24–29.Google Scholar
Peters, N. C. B. 1984. Competition between Galium aparine (cleavers) and cereals. Pages 3–4 in Abstract of AAB Meeting: Understanding Cleavers (Galium aparine) and Their Control in Cereals and Oilseed Rape. Wellesbourne, U.K.: Association of Applied Biologists.Google Scholar
Reid, D. J. and Van Acker, R. C. 2005. Seed burial by tillage promotes field recruitment of false cleavers (Galium spurium) and catchweed bedstraw (Galium aparine). Weed Sci 53:578–585.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
Sjostedt, A. S. 1959. Germination biology of cleavers, Galium aparine L. Vaxtodling 10:87–105.Google Scholar
Slade, E. A. and Causton, D. R. 1979. The germination of some woodland herbaceous species under laboratory conditions: a multifactorial study. New Phytol 83:549–557.Google Scholar
Steadman, K. J., Bignell, G. P., and Ellery, A. J. 2003. Field assessment of thermal after-ripening time for dormancy release prediction in Lolium rigidum seeds. Weed Res 43:458–465.Google Scholar
Taylor, K. 1999. Galium aparine L. J. Ecol 87:713–730.Google Scholar
Tonkin, J. H. B. and Phillipson, A. 1973. The presence of weed seeds in cereal seed drills in England and Wales during spring 1970. J. Natl. Inst. Agric. Bot 13:1–8.Google Scholar