[Growth and reproduction of mitochondria in loach oocytes].
The size and number of mitochondria markedly increase at the early stages of oogenesis in the loach (Misgurnus fossilis). The growth of mitochondrial membranes in the oocytes is characterized by the contact with the rough endoplasmic reticulum. In the period of slow growth of oocytes, the number of mitochondria increases 82 times and by the beginning of vitellogenesis 240 times. Two fractions of mitochondria were noted in the early oocytes: dividing mitochondria localized in the perinuclear zone and non-dividing ones in the periphery of the oocyte. In the period of slow growth of oocytes, 1--2% of dumb-bell-like mitochondria were found. It was calculated that the doubling of the number of mitochondria in the early oocytes proceeded during 1.5 months.
D000818:Animals; D003513:Cycloheximide / Q000494:pharmacology; D004272:DNA, Mitochondrial / Q000378:metabolism / Q000502:physiology; D005260:Female; D005399:Fishes / Q000196:embryology*; D008566:Membranes; D008928:Mitochondria / Q000378:metabolism; D009865:Oocytes / Q000648:ultrastructure*; D009866:Oogenesis; D010063:Ovum / Q000648:ultrastructure*; D014176:Protein Biosynthesis; D014633:Valine / Q000378:metabolism
D004272:DNA, Mitochondrial; D003513:Cycloheximide; D014633:Valine
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