Summary
Incorporation of3H-thymidine (3HTdr) into the nuclei of myofibril-containing myofibers of larvae of the silkworm,Bombyx mori, was shown by means of light microscope (LM) and electron-microscope (EM) autoradiography. The number of DNA-synthesizing myonuclei attains 42% 12–18 h after each molt. Thus in the developing silkworm DNA replication and myofibrillogenesis are coexisting and not mutually exclusive processes as is the rule in vertebrate somatic myogenesis.
References
Krishnakumaran, A., Berry, S. S., Oberlander, H., and Schneiderman, M. A., J. Insect Physiol.13 (1967) 1.
Akai, H., and Park Kwang Joon, Appl. Ent. Zool.6 (1971) 66.
Toselli, P. A., and Pepe, F. A., J. Cell Biol.37 (1968) 445.
Osborne, M. P., in: Insect Muscle, p. 151. Ed. P. N. R. Usherwood. London, New York, San Francisco 1975.
Edwards, E. S., Ruska, A., and de Harven, E., Archs Biol.69 (1958) 351.
Reynolds, E. S., J. Cell Biol.17 (1963) 208.
Larra, F., and Droz, B., J. Microsc.9 (1970) 845.
Holtzer, H., in: Cell Differentiation, p. 476. Eds W. O. Schjeide and J. de Vellis, Van Nostrand-Reinhold, Princeton, New York 1970.
Rumyantsev, P. P., Cardiomyocytes in the processes of reproduction, differentiation and regeneration. Nauka, Leningrad 1982 (in Russian).
Jinkin, L. N., and Rumyantsev, P. P., La synthèse de l'ADN au cours du développement et de la régénération de la musculature somatique, lisse et du muscule cardiaque. in: Développement des recherches anatomiques en URSS, p. 178. Ed. D. A. Jdanov, MIR, Moscow 1970.
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Komarov, S.A. DNA synthesis in the nuclei of differentiating muscle fibers of the silkworm,Bombyx mori L.. Experientia 41, 746–747 (1985). https://doi.org/10.1007/BF02012577
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DOI: https://doi.org/10.1007/BF02012577