- Autor(in)
- Seitenbereich
-
275 - 288
- Zusammenfsg.
-
The morphology of the chondriome in five mature zygotes of the green alga Chlamydomonas reinhardii was examined by morphometrical and graphical analyses of serial thin sections of whole cells. While the percentage of chondriome volume on cell volume consistently amounted to 1%, the mitochondrial number per cell varied between about 30 and 75 organelles. Different patterns of distribution of the mitochondrial mass into individual organelles were ascertained, indicating different states of morphology and different developmental stages of the zygotes. Compared to earlier examined young zygotes, the shape of the chondriome elements has changed from rounded to more rod-like elongated, forming a more heterogenous population. Surprisingly, the percentage of chondriome volume on cell volume in mature zygotes has dropped down to approximately half the percentage in vegetative cells, gametes and young zygotes. Our study shows that the morphodynamic behaviour of the chondriome by fusions and fissions of the mitochondria can also be observed in non-dividing cells which pass through a resting stage. Ue can only speculate, whether the loss of mitochondrial mass observed during zygote maturation can be explained under metabolic or genetic aspects.
- JST Art der Publikation
- Artikel