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Influence of localized ultra-violet irradiation on the incorporation of adenine-8-14C and D,L-Methionine-35S in Acetabularia mediterranea

par Brachet, Jean ;Olszewska, Maria
Référence Nature (London), 187, 4741, page (954-955)
Publication Publié, 1960

Article révisé par les pairs

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Résumé :

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. © 1960 Nature Publishing Group.