DIRECTIONAL TRANSPORTATION OF RIBONUCLEIC ACID IN FUCUS EGSS

Resumen

Fucus evanescens eggs were stained with methyl green-pyronine solution before and after bulging of the rhizoid pole. As a result, the following was made clear.
1) Before the bulging, red- and some bluestained particles are demonstrated in the cytoplasm, and these particles are distributed uniformly in the cytoplasm. The nucleus is stained blue. After the bulging, the cytoplasmic staining occurs selectively from around the nucleus to the tip of the rhizoid protuberance in bulging. Both the red and the blue cytoplasmic staining did not take place if the eggs were tested after being treated with RNase for 3 hours at 62° C.
2) The above indicates that the stained cytoplasmic elements represent RNA originated from the nucleus, and it is directionally transported from around the nucleus to the tip of rhizoid to take part in the rhizoid elongation.
The writer expresses his gratitudes to the members of the lnstitute of Algology, Muroran, for their kind cooperation in the investigation. His thanks are also due to Dr. Roberto Llamas, Director of the lnstitute of
Biology, National University of Mexico, for his acceptance of this article. The present invcstigation was supported by the Saito Gratitude Foundation, Sendai.