Abstract
WE have shown recently1,2 that methionine labelled with sulphur-35 is incorporated in a decreasing apico-basal gradient in the unicellular alga Acetabularia mediterranea. The existence of this gradient suggested a possible relationship between methionine incorporation, ribonucleic acid metabolism and the production of morphogenetic substances in this alga. We have now examined the effects of localized ultra-violet irradiation, delivered to algal stem tips or rhizoids, on morphogenesis and adenine and methionine incorporation, in order further to evaluate the reality of this relationship and its implications.
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References
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BRACHET, J., OLSZEWSKA, M. Influence of Localized Ultra-violet Irradiation on the Incorporation of Adenine-8-14C and D,L-Methionine-35S in Acetabularia mediterranea . Nature 187, 954–955 (1960). https://doi.org/10.1038/187954a0
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DOI: https://doi.org/10.1038/187954a0
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