Abstract
ABERG'S review1 cites Söding (Die Wuchstofflehre, Georg Thieme Verlag, Stuttgart, Germany, 1952) as suggesting that the generally recognized increased shoot/root ratios resulting from nitrogen fertilization are caused by nitrogen-increased growth hormone content which, in turn, inhibits root growth and promotes shoot growth in the intact plant. This suggestion appears reasonable and was supported by Bosemark2, who compared the growth of roots in high nitrogen solution with that of roots growing in solutions containing growth hormones.
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References
Aberg, B., Ann. Rev. Plant Physiol., 8, 153 (1957).
Bosemark, N. D., Physiol. Plant, 7, 497 (1954).
Wilkinson, S. R., Ph.D. thesis, Purdue Univ., Lafayette, Indiana. Wilkinson, S. R., and Ohlrogge, A. J., Agron. J., 54, 288 (1962).
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WILKINSON, S., OHLROGGE, A. Mechanism for Nitrogen-increased Shoot/Root Ratios. Nature 204, 902–904 (1964). https://doi.org/10.1038/204902b0
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DOI: https://doi.org/10.1038/204902b0
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