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107548

Ultrastructural study on the foot and the shell of the oyster Pinctada radiata (leach, 1814),(Bivalvia Petridae).

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Last updated: 04 Jan 2025

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Abstract

The shape and microscopic structure of the foot of the oyster were described by light and electron microscopy. The foot is wedge-shaped with vertical furrows on the surface; it is composed of an epithelial layer, a connective tissue layer and a muscular layer. The epithelial layer was composed mostly of ciliated columnar epithelia and secretory cells. The cilia and microvilli were observed on the free surface of epithelial cells. The muscle fibers were composed of thin and thick microfilaments. Thick and thin filaments in muscle cells were reported in the foot as well as lateral projections of the cytoplasm contained granules. The outer surface of the periostracum of the shell is reported to be microridge and microfringe were present as well. The simplicity of periostracum of the shell layers was observed as thin simple layer whereas the prismatic layer was the opposite. Wedge-shaped and elongated prisms were reported near the outer surface. Fine lamellae were representing the nacreous layer and were divided by laminar inclusion. Micro-fringes were considered to be helping the direction of bivalve

DOI

10.21608/jbaar.2016.107548

Keywords

Bivalve, Pinctada radiata, periostracum, prismatic layer, nacreous layer, foot

Authors

First Name

Eman H.

Last Name

Radwan

MiddleName

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Affiliation

Department of Zoology, Faculty of Science, Damnhour University, El Behara, Egypt

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Orcid

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First Name

Gaber A.

Last Name

Saad

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Affiliation

Department of Biology, College of Medicine, Dammam University, Saudi Arabia, KSA , Department of Zoology, Faculty of Science, Alexandria University, Alexandria, Egypt

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Orcid

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First Name

Sherifa Sh.

Last Name

Hamed

MiddleName

-

Affiliation

Department of Zoology, College of Science, King Saud University, Saudi Arabia, KSA , Department of Zoology, Faculty of Science, Alexandria University, Alexandria, Egypt

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Orcid

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Volume

2

Article Issue

4

Related Issue

16281

Issue Date

2016-04-01

Receive Date

2016-03-20

Publish Date

2016-04-25

Page Start

274

Page End

282

Print ISSN

2356-9174

Online ISSN

2356-9182

Article File

JBAAR_Volume 2_Issue 4_Pages 274-282.pdf

PDF . 1.9MB

Link

https://jbaar.journals.ekb.eg/article_107548.html

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https://jbaar.journals.ekb.eg/service?article_code=107548

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6

Type

Original Article

Type Code

1,272

Publication Type

Journal

Publication Title

Journal of Bioscience and Applied Research

Publication Link

https://jbaar.journals.ekb.eg/

MainTitle

Ultrastructural study on the foot and the shell of the oyster Pinctada radiata (leach, 1814),(Bivalvia Petridae).

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Article

Created At

22 Jan 2023