par Grenson, Marcelle 
;Godts, A.
Référence Experimental cell research, 19, 2, page (376-382)
Publication Publié, 1960-03
;Godts, A.Référence Experimental cell research, 19, 2, page (376-382)
Publication Publié, 1960-03
Article révisé par les pairs
| Résumé : | Green Euglena cells were isolated and grown in hanging drops immediately after either treatment with streptomycin, ultraviolet irradiation or culture at 34 °C, three treatments known to induce the formation of permanently white strains. No relationship was observed between the persistence of a visible green plastid in a cell (resulting from the segregation of the chloroplasts by dilution out) and the transmission of the ability to synthesize chlorophyll to its descendance. Moreover, the descendance of the isolated cells was found to be, as a rule, a homogeneous population either of green or of white cells. Green Euglenae treated with streptomycin were subcultured in normal liquid medium and plated at each generation. After having decreased for several generations, the percentage of green colonies increased again. These observations would be very difficult to interpret on the hypothesis that the inducing agents affect the genetic continuity of the chloroplasts. Other possibilities are indicated. © 1960. |
