Electron Microscope Studies of Insect Muscle. I. Flight and Coxal Muscle of Hydrophilus Piceus
| Autor: | Pérsio de Souza Santos, Paulo Sawaya, Helena de Souza Santos, George A. Edwards |
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| Rok vydání: | 1954 |
| Předmět: | |
| Zdroj: | Annals of the Entomological Society of America. 47:343-354 |
| ISSN: | 1938-2901 0013-8746 |
| DOI: | 10.1093/aesa/47.2.343 |
| Popis: | The ultrastructure of vertebrate muscle has been, of recent years, under intensive study (Hall, Jakus and Schmitt, 1946; Jakus and Hall, 1947; Szent-Gyorgyi, 1947; 1953; Jones and Barer, 1948; Draper and Hodge, 1949; Rozsa, Szent-Gyorgyi and Wyckoff, 1950; Bluhm and Sitaramayya, 1951; Perry and Home, 1952; Weber and Portzehl, 1952). As a result we now have a good idea of the structural organization of vertebrate muscle fibers and a knowledge of the relation between certain morphological and chemical events in the fiber during its action. To date there are few published studies of the ultrastructure of invertebrate striated muscle. The first was that of Richards, Anderson and Hance (1942) who used insect muscle to illustrate a fine sectioning technique. Later, Farrant and Mercer (1952) studied the filamentous structure of grasshopper wing muscle and crab leg muscle, but failed to show the classical cross striations in the fibrils. More recently in a comparative study of invertebrate and vertebrate fibrils (Edwards, Souza Santos, Souza Santos and Sawaya, 1953a; 1953b) it was found that muscles from different regions of the insect present differences in fibrillar structure, and that the insect fibril differs considerably from that of the vertebrate. Differences between insect and vertebrate muscle fibers are not too surprising in view of the fact that ryanodine, a drug acting specifically on the contractile processes in striated muscle, produces different responses in the frog and cockroach muscle (Edwards, Weiant, Slocombe and Roeder, 1948; Edwards and Theodorides, 1949), some of these differences being summarized in Table I. Further differences between insect and vertebrate muscle may be encountered in the innervation, intermediary metabolism, oxygen supply, etc. ( cf . Roeder, 1953). Thus a study of the ultrastructure of various types of insect muscles seems warranted. |
| Databáze: | OpenAIRE |
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