Oldenburg: Bibliotheks- und Informationssystem der Univ.
8 S. , [5] Bl zahlr. Ill., graph. Darst.
In Euglena gracilis grown with acetate in the dark, the glyoxysomal marker isocitrate lyase was found not to be located in microbodies but in vacuolar structures newly formed by disintegrating mitochondria during heterotrophic growth. The mitochondrial vacuoles contained also spherical organelles with diameters in the range of 0.2 to 0.5 mym and characteristic structures of microbodies. After isolation of these organelles they could be shown to posess only enzymes of the ß-oxidation pathway like microbodies of other primitive algae. Mitochondria disintegrated also in seeds of cucumber which were germinated for three days thereby forming ER-like structures which frequently were seen in close contact with developing microbodies. Altogether, we conclude from our data that microbodies in plant organisms originate from disintegrating mitochondria. <engl.>
