Abstract
IT has recently been shown1 that the substituted purine, 5-amino-7-hydroxy-I-V-triazolo (D) pyrim-idine (guanazolo), when sprayed on the leaves of plants delays or inhibits, within the plant, the development of certain virus infections. Subsequent work, reported briefly here, has shown that hypo-xanthine, adenine and guanine reverse the activity of guanazolo, while other naturally occurring purines do not. The triazolo analogue of hypoxanthine also shows some virus-inhibitory activity.
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References
Matthews, R. E. F., Nature, 167, 892 (1951).
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MATTHEWS, R. Effect of Purines on the Multiplication of Plant Viruses. Nature 169, 500–501 (1952). https://doi.org/10.1038/169500b0
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DOI: https://doi.org/10.1038/169500b0
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