Journals / Afyon Kocatepe Üniversitesi Fen ve Mühendislik Bilimleri Dergisi / 2021 / Cilt: 21 - Sayı: 1

Histological Structure of the Ovary of Hyalomma marginatum (Koch, 1844) (Acari: Ixodidae)

Hyalomma marginatum (Koch, 1844) (Acari: İxodidae)’un Ovaryumunun Histolojik Yapıs

Pages
25–34
Publication Date
2022-10-12
DOI
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

Oocyte degeneration was observed although it was not so common in the ovary.

📌 3 Key Takeaways

🎯
Objective & Hypothesis:With this study, the ovary and oogenesis in Hyalomma marginatum were histologically and histochemically examined at light microscope level for the first time.
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Key Findings & Data:Mature oocytes were oval to rounded in shape, the largest one being 315x295 µm in diameter.
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Conclusion & Impact:Oocyte degeneration was observed although it was not so common in the ovary.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters

Abstract

With this study, the ovary and oogenesis in Hyalomma marginatum were histologically and histochemically examined at light microscope level for the first time. The ovary lacks nurse and follicular cells, thus defined as panoistic type. Wall of the ovary, a hollow tubular structure, is composed of a layer of epithelial cells and developing oocytes. Facing hemocoel, oocytes are attached to the ovarian wall through a pedicel. The developing oocytes were classified according to cytoplasm appearance, presence of germinal vesicle, constitution of yolk granules, and formation of chorion, and accordingly four developmental stages were described. Mature oocytes were oval to rounded in shape, the largest one being 315x295 µm in diameter. Staining techniques revealing the presence of proteins and carbohydrates indicate in this tick species that yolk granules contain both proteins and carbohydrates, that carbohydrates are first to be synthesized prior to proteins during vitellogenesis, and that carbohydrates predominate in chorion. Oocyte degeneration was observed although it was not so common in the ovary.

Özet

Hyalomma marginatum’un ovaryumu ve ovogenez süreci ilk kez bu çalışmada ışık mikroskobudüzeyinde histolojik ve histokimyasal olarak incelenmiştir. Ovaryum nurse ve folikül hücrelerindenyoksundur ve bu nedenle panoistik olarak tanımlanmıştır. İçi boş tübül biçimindeki ovaryumun duvarıtek sıra epitel hücrelerinden ve gelişmekte olan ovositlerden oluşur. Ovositler bir pedisel ile hemosölebakacak şekilde ovaryum duvarına bağlıdır. Sitoplazmanın görünüşü, germinal vesikülün varlığı,yumurta sarısı granüllerinin bileşimi ve koryonun oluşumuna göre gelişmekte olan ovositlersınıflandırılmış ve dört evre tanımlanmıştır. Olgun ovositler küresele yakın eliptik şekilli olup, en büyükovosit 315x295 µm çapındadır. Protein ve karbonhidratların varlığını gösteren boyama teknikleri bukene türünde, yumurta sarısı granüllerinde hem proteinlerin hem de karbonhidratların bulunduğunu,vitellogenezde karbonhidratların proteinlerden önce sentezlendiğini ve koryonda karbonhidratlarınbaskın olduğunu göstermiştir. Çok yaygın olmasa da ovaryumda ovosit yozlaşması gözlenmiştir.

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Cite This Article

YILMAZER, N., YAMAN, E. (2022). Histological Structure of the Ovary of Hyalomma marginatum (Koch, 1844) (Acari: Ixodidae). Afyon Kocatepe Üniversitesi Fen ve Mühendislik Bilimleri Dergisi, Cilt: 21 - Sayı: 1, 25–34. https://ajindex.com/articles/429681

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