Summary
Nodulation of inoculated pea plants was severely inhibited when ethrel (2-chloroethane phosphonic acid) was applied to the roots. The inhibition was evident at ethrel concentrations of 2 ppm and above. Ethrel applied to the foliage at 10 ppm also depressed nodulation. At least part of the effect of ethrel on nodulation came from its inhibition of root growth.
Nodulation was inhibited on half of a divided root system treated with ethrel, while there was no inhibition on the neighbouring untreated half.
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References
Burg, S. P. and Burg, E. A., Interaction of auxin and ethylene and its role in plant growth. Proc. Natl. Acad. Sci. U.S.A.55, 262–269 (1966).
Chadwick, A. V. and Burg, S. P., An explanation of the inhibition of root growth caused by indole — 3 — acetic acid. Plant Physiol. Lancaster42, 415–420 (1967).
Nutman, P. S., Studies on the physiology of Nodule Formation III. Experiments on the excision of root tips and nodules. Ann. Botany N.S.16, 79–101 (1952).
Payne, M. G. and Fults, J. L., Some effects of 2, 4-D, DDT and Colorado 9 on root nodulation in the Common bean. J. Am. Soc. Agron.39, 52–55 (1947).
Tanner, J. W. and Anderson, I. C., An external effect of added nitrogen on nodulation. Plant Physiol. Lancaster,39, 1039–1043 (1964).
Wrobel, T., The influence of 2, 4-D on rhizobium. Acta Microbiol. Polonica1, 39–41, (1952).
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Drennan, D.S.H., Norton, C. The effect of ethrel on nodulation inPisum sativum L.. Plant Soil 36, 53–57 (1972). https://doi.org/10.1007/BF01373456
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DOI: https://doi.org/10.1007/BF01373456