geoscience.net logo
+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

Behavior of cytoplasmic membranous structures in spermatogenesis of the grasshopper, Atractomorpha bedeli Bolivar


, : Behavior of cytoplasmic membranous structures in spermatogenesis of the grasshopper, Atractomorpha bedeli Bolivar. Cytologia 32(1): 72-86

Formation of the stack of cisternal endoplasmic reticulum and the tubular endoplasmic reticulum (ER) were studied in successive stages of meiotic divisions in A. bedeli. Only a few stacks of cisternal ER or tubular ER are seen in the cytoplasm of gonial cells. The cytoplasm in cells at diplotene and diakinesis stages is, however, filled with agranular tubular ER. Some cells in early meiotic prophase (Leptotene stage) show agglomeration of vesicles in the vicinity of Golgi bodies or between Golgi bodies. In this region, near the Golgi body or between Golgi bodies, a developing stack of granular ER cisternae is seen in cells in the pachytene stage. The elements in the ER stack are continuous with the Golgi vesicles. The Golgi vesicles furthest outside the Golgi cisternae are oblong and semi-granular, suggesting that they are half-formed ER cisternae. At these stages, tubular ER is also present, but is limited to the vicinity of the Golgi body. Continuation of tubular ER with the Golgi vesicles is often observed. These observations suggest that the stack of cisternal ER and tubular ER are formed by fusion of Golgi vesicles. The stack of cisternal ER afterwards moves in the cytoplasm to a place apart from the Golgi region and becomes attached to the nuclear envelope.

US$19.90

DOI: 10.1508/cytologia.32.72


Other references

Atkins, J.G., 1967: Rice research in Texas. Rice disease studies. Rice vars. resistant to straighthead developed in Texas since 1954 include Bluebelle and Belle Patna. Of the 32 international races of Pyricularia oryzae established as a result of the co-operative project beween the U.S.A. and Japan, 10 occur in...

Klein, L.M.; Harmond, J.E., 1971: Seed moisture. A harvest timing index for maximum yields. From a study of the physical characteristics of a number of grass and legume seed crops in relation to seed yields, it was concluded that seed moisture content may be used to predict the optimum cutting date of the crop. The optimum moisture conte...

Saleev, A.A., 1975: Sensitivity of school children in the Mantoux 5 TE PPD-L test. Problemy Tuberkuleza: 10-13

Schölmerich, P., 2016: Prof. Dr. med. Dr.h.c. Paul Schölmerich. Deutsche Medizinische Wochenschrift 140(20): 1548-1551

Chen, G.; Li, H.; Das, S., 2016: Scaling Relationships for Spherical Polymer Brushes Revisited. In this short paper, we revisit the scaling relationships for spherical polymer brushes (SPBs), i.e., polymer brushes grafted to rigid, spherical particles. Considering that the brushes can be described to be encased in a series of hypothetical sp...

Sekuler, A.B.; Bennett, P.J., 2000: Teaching the brain to see. Neuron 27(1): 8-10

Yang, X.J.; Hu, Y.S.; Zheng, X.; Wang, G.J.; Tu, X.D., 1990: Determination of metoprolol in plasma by gas chromatography and electron-capture detection. A method is described to determine metoprolol in plasma by GC-ECD. Metoprolol and alprenolol (internal standard) reacted rapidly with heptafluorobutyric anhydride under the catalysis of tetrahydrofuran (THF) after being extracted from plasma with...

Pajusalu, L.; Martin, G.; Paalme, T.; Põllumäe, A., 2016: The effect of CO 2 enrichment on net photosynthesis of the red alga iFurcellaria lumbricalis in a brackish water environment. NlmCategory="UNASSIGNED">Anthropogenic carbon dioxide (CO<sub>2</sub>) emissions to the atmosphere are causing reduction in the global ocean pH, also known as ocean acidification. This change alters the equilibrium of diff...

Rossetto, E.Valeska.; Luna, E.José.de.Albuquerque., 2016: A Descriptive Study Of Pandemic Influenza A(H1n1)pdm09 In Brazil, 2009 - 2010. NlmCategory="UNASSIGNED">Influenza A viruses undergo frequent antigenic mutations and may thus cause seasonal epidemics and pandemics. The aim of this study was to recover the epidemiological history of the pandemic influenza A(H1N1)p...

Hampel, U.; Hildebrandt, G.; Freyer, R., 1998: In vitro determination of substance concentration in scattering media with NIR laser remssionspectroscopy. Biomedizinische Technik. Biomedical Engineering 43 Suppl: 116-117