PMID: 13563555Jul 25, 1958Paper

The spermatid nucleus in two species of grasshopper

The Journal of Biophysical and Biochemical Cytology
J G GALL, L B BJORK

Abstract

The nuclear changes accompanying spermatid elongation have been studied in two species of grasshopper, Dissosteira carolina and Melanoplus femur-rubrum. Testes were fixed in 1 per cent buffered OsO(4), imbedded in butyl methacrylate, and examined as thin sections in the electron microscope. In both species nuclear changes during spermatid development involve (1) an early period, during which the nuclear contents are predominately fibrous; (2) a middle period, characterized by the lateral association of the nuclear fibers to form plates or lamellae which are oriented longitudinally in the major axis of the elongated nucleus; and (3) a late period, involving coalescence of the lamellae into a crystalline body which eventually becomes so dense that all resolvable detail is lost. The fibers seen in the early spermatid nucleus are about 150 A in diameter and so are similar to fibers described from other types of nuclei. The thickness of the lamellae varies from about 150 A when first formed to 70 A during the later stages. The lack of evident chromosomal boundaries in the spermatid nucleus makes it difficult to relate either the fibers or lamellae to more familiar aspects of chromosome structure. We see no apparent reason to conside...Continue Reading

References

Jan 1, 1953·Biochimica Et Biophysica Acta·M H F WILKINS, J T RANDALL
Feb 1, 1954·Experimental Cell Research·W BEERMANN, G F BAHR
Jul 25, 1955·The Journal of Biophysical and Biochemical Cytology·M H BURGOS, D W FAWCETT
Sep 25, 1955·The Journal of Biophysical and Biochemical Cytology·M A RUDZINSKA, K R PORTER
May 25, 1956·The Journal of Biophysical and Biochemical Cytology·M H BURGOS, D W FAWCETT
Aug 1, 1956·Experimental Cell Research·G YASUZUMI
Jul 25, 1956·The Journal of Biophysical and Biochemical Cytology·H RIS
Jan 1, 1956·Cold Spring Harbor Symposia on Quantitative Biology·B P KAUFMANN, M R MCDONALD
Mar 25, 1957·The Journal of Biophysical and Biochemical Cytology·I R GIBBONS, J R BRADFIELD
Jul 25, 1957·The Journal of Biophysical and Biochemical Cytology·L I REBHUN
Sep 25, 1957·The Journal of Biophysical and Biochemical Cytology·L E ROTH

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Citations

Jan 1, 1971·Zeitschrift für Zellforschung und mikroskopische Anatomie·P D Lunger
Dec 1, 1966·The Journal of Cell Biology·M P Jamuar
May 1, 1968·The Journal of Cell Biology·F R Turner
Jun 1, 1967·Journal of Ultrastructure Research·E B SandbornJ J Roberge
Jun 1, 1969·Journal of Ultrastructure Research·R Hadek
Jan 1, 1961·Experimental Cell Research·R A GRESSON, M M PERRY
Feb 1, 1975·Journal of Ultrastructure Research·B R Zirkin
Dec 1, 1970·Journal of Ultrastructure Research·J K Koehler

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