Summary
The amino acid composition of the medium in which seedlings of peas had been grown aseptically with and without quartz sand were determined by ion-exchange chromatography. Besides considerable amounts of amino acids, peptide material was also present.
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References
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Boulter, D., Jeremy, J.J. & Wilding, M. Amino acids liberated into the culture medium by pea seedling roots. Plant Soil 24, 121–127 (1966). https://doi.org/10.1007/BF01373078
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DOI: https://doi.org/10.1007/BF01373078