Abstract
IT has been shown in water culture1 that the rate of phosphorus absorption by plants is, Under certain conditions, significantly reduced when activities of phosphorus-32 as low as 10 microcuries per are used as a tracer. Root-growth is also depressed ; nevertheless, the development of the aerial parts of plants provides no consistent index of radiation damage. These effects are explained by the metabolic accumulation of labelled phosphorus, which may cause the root tips of rapidly absorbing plants to, be exposed to radiation many hundred times more intense than that in the culture solution.
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References
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Russell, R., Adams, S. & Martin, R. Radiation Effects Due to Phosphorus-32 in Fertilizer Experiments. Nature 164, 993–995 (1949). https://doi.org/10.1038/164993a0
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DOI: https://doi.org/10.1038/164993a0
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