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Abstract ▼ AI-Helper

The formation of the acrosome during spermatogenesis in Gerris paludum was studied. The Golgi bodies are dispersed randomly in the cytoplasm at the early stage of the spermatocyte and get together to form several group of many bodies, and then they are equally divided into the spermatids by the meio...

The formation of the acrosome during spermatogenesis in Gerris paludum was studied. The Golgi bodies are dispersed randomly in the cytoplasm at the early stage of the spermatocyte and get together to form several group of many bodies, and then they are equally divided into the spermatids by the meiotic divisions. The acroblast first appears in the form of a vesicle and soon an acrosomal granule is differentiated within it. The acroblast is separated from the acrosomal granule at the posterior of the nucleus and is finally sloughed off along the tail filament. The acrosome, after moving to the side of the nucleus opposite the mitochondrial derivatives, differentiates into two zones. The two basal bodies and the differentiated tip originate from the sheath. The basal bodies appear at the proximal part of the sheath simply in contact with the core on one side. During elongation and and narrowing of the acrosomes of the spermatids, they surround the one side at the base of the acrosome and finally all the other are immediately adjacent to the nucleus. The differentiated tip continues to the sheath at the anterior of the cores and is elongated prior to the two basal bodies. They appear to be contiguous twin-tubes, not a single granule in the later stage of the spermatids, and a group of the basal bodies in the sperm bundle.