Subcellular localization of calcium deposits in the noble crayfish Astacus astacus spermatophore: Implications for post-mating spermatophore hardening and spermatozoon maturation

Journal of Morphology
Hamid Niksirat, Antonín Kouba

Abstract

The freshly ejaculated spermatophore of crayfish undergoes a hardening process during post-mating storage on the body surface of female. The ultrastructural distribution of calcium deposits were studied and compared in freshly ejaculated and post-mating noble crayfish spermatophores, using the oxalate-pyroantimonate technique, to determine possible roles of calcium in post-mating spermatophore hardening and spermatozoon maturation. Small particles of sparsely distributed calcium deposits were visible in the wall of freshly ejaculated spermatophore. Also, large amount of calcium deposits were visible in the membranes of the freshly ejaculated spermatozoon. Five minutes post-ejaculation, granules in the spermatophore wall appeared as porous formations with numerous electron lucent spaces. Calcium deposits were visible within the spaces and scattered in the spermatophore wall matrix, where smaller calcium deposits combined to form globular calcium deposits. Large numbers of the globular calcium deposits were visible in the wall of the post-mating spermatophore. Smaller calcium deposits were detected in the central area of post-mating spermatophore, which contains the sperm mass, and in the extracellular matrix and capsule. While t...Continue Reading

References

Jul 1, 1994·Biology of Reproduction·N RavindranathM Dym
May 4, 2002·Molecular and Cellular Endocrinology·Haim Breitbart
Sep 7, 2004·Molecular Reproduction and Development·Rapeepun VanichviriyakitPrasert Sobhon
Nov 29, 2005·Animal Reproduction Science·J RozinekF Jílek
Dec 24, 2005·Physiological Reviews·Michael Whitaker
Aug 27, 2014·Animal Reproduction Science·Hamid NiksiratPavel Kozák
Dec 3, 2014·Micron : the International Research and Review Journal for Microscopy·Hamid NiksiratPavel Kozák
Dec 9, 2014·Micron : the International Research and Review Journal for Microscopy·Antonín KoubaMartin Bláha
Sep 25, 2015·Micron : the International Research and Review Journal for Microscopy·Amin GolpourHamid Niksirat

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Citations

Jul 28, 2017·Animal : an International Journal of Animal Bioscience·B YaziciogluH Niksirat
Nov 22, 2016·Microscopy and Microanalysis : the Official Journal of Microscopy Society of America, Microbeam Analysis Society, Microscopical Society of Canada·Amin GolpourHamid Niksirat
May 16, 2017·Journal of Morphology·Amin GolpourHamid Niksirat

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