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Molybdenum deficiency in wheat results in lower dormancy levels via reduced ABA

Published online by Cambridge University Press:  19 September 2008

A. T. Modi  and
A. L. P. Cairns
A. T. Modi
Affiliation:
Department of Agronomy, University of Natal, Private Bag X01, Scottsville, 3209Republic of South Africa
A. L. P. Cairns*
Affiliation:
Department of Agronomy, University of Natal, Private Bag X01, Scottsville, 3209Republic of South Africa
*
*Correspondence
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Abstract

Wheat which was grown in acid-washed sand and irrigated with a molybdenum-free nutrient solution was treated with various concentrations of molybdenum (Mo) as a foliar spray at the flag leaf stage. At maturity, dormancy levels and abscisic acid (ABA) content of the seed were determined. Seed dormancy and ABA content increased with increasing rates of Mo application. In a field experiment, wheat (cv. SST 66) was treated with 100 ppm Mo by foliar application at the flag leaf stage. Embryos were tested for sensitivity to exogenously applied ABA. Embryos from Mo-treated plants showed enhanced sensitivity to ABA-induced inhibition of germination. The Mo application also resulted in significantly higher levels of endogenous ABA and Mo in the seeds. It is postulated that Mo deficiency leads to a lack of dormancy in wheat via reduced synthesis of ABA.

Keywords

ABAdormancyembryo and grain sensitivitymolybdenumwheat
Type
Research Papers
Information
Seed Science Research , Volume 4 , Issue 3 , September 1994 , pp. 329 - 333
Copyright
Copyright © Cambridge University Press 1994

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References

Cairns, A.L.P. and Kritzinger, J.H. (1992) The effect of molybdenum on seed dormancy in wheat. Plant and Soil 145, 295–297.CrossRefGoogle Scholar
Cutting, J.G.M. (1984) Optimization, validation and application of radioimmunoassays for plant growth substances in avocado (Persea americana Mill.) fruits. PhD Thesis, University of Natal, South Africa.Google Scholar
Cutting, J.G.M., Hofman, P.J., Lishman, A.W. and Wolstenholme, B.N. (1986) Abscisic acid, isopentenyladenine and isopentenyladenosine concentrations in ripening fruit as determined by radioimmunoassay. Acta Horticulturae 179, 793–800.CrossRefGoogle Scholar
Derera, N.F. (1990) A perspective of sprouting research. pp 3–14in Ringlund, K., Mosleth, E. and Mares, D.J. (Eds) International symposium on pre-harvest sprouting in cereals. Boulder, Westview Press.Google Scholar
Farwell, A.J., Farina, M.P.W. and Channon, P. (1991) Soil acidity effects on premature germination in immature maize grain. pp 355–361in Wright, R.J., Baligar, V.C. and Murrman, R.P. (Eds) Plant-soil interactions at low pH. Dordrecht, Kluwer Academic.CrossRefGoogle Scholar
Johnson, C.M. and Ulrich, A. (1959) Analytical methods for use in plant analysis. Californian Agricultural Experiment Station Bulletin 766, 26–78.Google Scholar
Karssen, C.M., Brinhorst-van de Swan, D.L.C., Breekland, A.E. and Koorneef, M. (1983) Induction of dormancy during seed development by endogenous abscisic acid: studies on abscisic acid deficient genotypes of Arabidopsis thaliana (L.) Heynh. Planta 157, 158–165.CrossRefGoogle ScholarPubMed
McCrate, A.J., Nielsen, M.T., Paulsen, G.M. and Heyne, E.G. (1982) Relationship between sprouting in wheat and embryo response to endogenous inhibition. Euphytica 31, 193–200.CrossRefGoogle Scholar
Morris, C.F., Anderberg, R.J., Goldmark, P.J. and Walker-Simmons, M.K. (1991) Molecular cloning and expression of abscisic acid-responsive genes in embryo of dormant wheat seeds. Plant Physiology 95, 814–821.CrossRefGoogle ScholarPubMed
Morris, C.F., Moffatt, J.M., Sears, R.G. and Paulsen, G.M. (1989) Seed dormancy and response of caryopses embryo calli to abscisic acid in wheat. Plant Physiology 90, 643–647.CrossRefGoogle ScholarPubMed
Quatrano, R.S., Ballo, B.L., Williamson, J.D., Hamblin, J.T. and Mansfield, M. (1983) ABA-controlled expression of embryo specific genes during wheat grain development. pp 343–353in Goldberg, R. (Ed.) Plant molecular biology. New York, Liss Inc.Google Scholar
Tanner, P.D. (1978) A relationship between premature sprouting on the cob and molybdenum and nitrogen status of maize grain. Plant and Soil 49, 427–432.CrossRefGoogle Scholar
Vunkova-Radeva, R., Schieman, J., Mendel, R.R., Salcheva, G. and Georgieva, D. (1988) Stress and activity of molybdenum-containing complex (molybdenum cofactor) in winter wheat seeds. Plant Physiology 87, 533–535.CrossRefGoogle ScholarPubMed
Walker-Simmons, M. (1987) ABA levels and sensitivity in developing wheat embryos of sprouting resistant and susceptible cultivars. Plant Physiology 84, 61–66.CrossRefGoogle ScholarPubMed
Walker-Simmons, M. (1988) Enhancement of ABA responsiveness in wheat embryos by high temperature. Plant Cell and Environment 11, 769–775.CrossRefGoogle Scholar
Walker-Simmons, M.K., Kudrna, D.A. and Warner, R.L. (1989) Reduced accumulation of ABA during water stress in a molybdenum cofactor mutant of barley. Plant Physiology 90, 728–733.CrossRefGoogle Scholar

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