Die Betheiligung von Centralkörper und Sphäre am Aufbau des Samenfadens bei Säugethieren

Niessing, Carl

doi:10.1007/bf02977427

Cited by 23 publications

(15 citation statements)

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“…27 until the time that mitosis is completed by the division of the chromosomes through the middle of the dumbbells (Figs. 41,42,44,45,48), there seems no possibility of avoiding the conclusion that the first maturation mitosis in the spermatocytes of Bufo is a transverse or reduction division in the N7eismannian sense, separating cliromosomes that were united end to end in synapsis.…”

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confidence: 99%

The spermatogenesis of bufo lentiginosus

King¹

1907

Am. J. Anat.

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WITH 3 PLATES AND 2 DIACEAMS 1.U Tl€E TEXT.Although the spermatocytes of amphibians seem to be exceptionallj favorable material for a study of maturation phenomena, there has been considerable controversy among the workers on amphibian spermato genesis regarding the character of the maturation divisions. Several investigators, among whom may be mentioned Meves, MeGregor, and Eisen, maintain that both of the maturation divisions are longitudinal ; Montgomery and vom Rath, on the other hand, claim that only one of the divisions is longitudinal, the other being a reduction division in the Weismannian sense. It seems necessary, therefore, that the behavior of of the chromatin in the germ-cells of more species of amphibians should be studied in order that this point may be definitely determined.With the exception of vom Rath (46, 47,) MATERIAL AND METHOD.Testes of adult toads killed at various times from April until September, and also testes of young toads with a body length of from 2 em. t o 6 em. were used for these investigations. In both kinds of material like processes of development were found to be taking place, and i t is evident that the spermatozoa formed anew each year in the adult undergo

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confidence: 99%

The spermatogenesis of bufo lentiginosus

King¹

1907

Am. J. Anat.

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“…He thought that the “chromatic body” was formed from the debris of nuclear chromatin. Niessing [ 144 ] investigated in detail the involvement of centriole and “Sphäre” (currently proacrosomal granule) in spermatogenesis of guinea pig, rat and mouse and referred to the formation of the “chromatoide Nebenkörper” of these animals. He observed that “chromatoide Nebenkörper” of these animals appeared in the juxtanuclear cytoplasm of spermatocytes and suggested that during differentiation of the cells it moved to the cytoplasm at the base of the flagellum and finally entered into a residual body cytoplasm where it is degraded (Fig.…”

Section: Early Studies (1876–1955)mentioning

confidence: 99%

“…Light microscopic studies on the CB carried out from 1876 to 1950 were summarized as follows: this structure was first called “chromatoide Nebenkörper” [ 19 ], because it was stained red by safranine like nucleolus and dividing chromosomes. Many authors [ 116 , 132 , 144 , 216 ] used this name. The current name chromatoid body (CB) was derived originally from the German term “chromatoid Körper” coined by Schreiner and Schreiner [ 176 ] and was widely accepted.…”

Section: Early Studies (1876–1955)mentioning

confidence: 99%

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Historical Survey on Chromatoid Body Research

Yokota

2008

Acta Histochem. Cytochem

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The chromatoid body (CB) is a male reproductive cell-specific organelle that appears in spermatocytes and spermatids. The cytoplasmic granule corresponding to the CB was first discovered some 130 years ago by von Brunn in 1876. Thirty years later the German term "chromatoide Körper" (chromatoid body) was introduced to describe this granule and is still used today. In this review, first, the results obtained by light microscopic studies on the CB for the first 60 years are examined. Next, many findings revealed by electron microscopic studies are reviewed. Finally, recent molecular cell biological studies concerning the CB are discussed. The conclusion obtained by exploring the papers on CB published during the past 130 years is that many of the modern molecular cell biological studies are undoubtedly based on information accumulated by vast amounts of early studies.

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“…Aueh yon der eigenthtlmliehen, bei der Wanderung der Centralk~rper gegen das Zelleentrum auftretenden Einsttilpung tier Zelloberflaehe, ,die seheidenartig den Anfangstheil des ganzen Axenfadens umhtlllt ", erinnere ieh mieh nie etwas gesehen zu haben, denn die Fig. 4 Zunaehst muss ich far mehr wie bedenklieh die Angaben halten, die N i e s s i n g (34) tiber die sich an der Spermatidensphare abspielenden Veranderungen maeht. Die farbbaren (Eisenhamatoxylin)Microsomen derselben verschmelzen miteinander und vereinigen sich so zu wenigen, gr0sseren KUgelchen; an diesem Process betheiligen sich auch die Centralk6rperehen und so entsteht allmahlieh ein grosses farbbares Korn (Mitosom), das, in einen glashellen K~rper eingesehlossen, sieh dem unveritndert gebliebenen interfilaren Substanzrest der Sphare ansehmiegt.…”

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Beiträge zur Kenntniss der Spermatogenese

Hermann¹

1897

Archiv f. mikrosk. Anat.

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Die Betheiligung von Centralkörper und Sphäre am Aufbau des Samenfadens bei Säugethieren

Cited by 23 publications

References 3 publications

The spermatogenesis of bufo lentiginosus

The spermatogenesis of bufo lentiginosus

Historical Survey on Chromatoid Body Research

Beiträge zur Kenntniss der Spermatogenese

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