Article révisé par les pairs
Résumé : When amphibian oocytes (X. laevis, R. pipiens) are treated for a few minutes with the detergent SDS (0.3%) and then transfered to amphibian Ringer, the nucleolar organizers become visible, with the Feulgen reaction, as pink, central bodies. The are particularly easy to see when the Feulgen stained sections are examined under a fluorescence microscope. The possible applications of these observations for future work are discussed. © 1972, Taylor and Francis Group, LLC.