ISSN:
1615-6102
Keywords:
Mitochondrion-dividing ring
;
Plastid-dividing ring
;
Mitochondrial division
;
Plastid division
;
Microbody
;
Cyanidioschyzon merolae
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Summary We present strong electron microscopic evidence that the mitochondrial-dividing ring (MD-ring) forms as a closed ring about 50 nm wide and 10 nm thick, at the contact point where the micro-body attaches to the mitochondrion. This ring forms in the cytoplasm around an equatorial plane perpendicular to the major axis of a mitochondrion. As the MD-ring increases in both width and thickness, the mitochondrion becomes dumbbell-shaped with a narrow interconnecting isthmus. Then, by successive contractions of the ring, the dumbbell-shaped mitochondrion separates to generate two daughter mitochondria. We also observed formation of an electron dense plastid-dividing ring (PD-ring) during plastid divisions. We noted too the behaviour of the MB in relation to the contraction of MD-rings and PD-rings.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01276930
