Histological and histochemical observations of the hemolymph cells in the crayfish, <i>Orconectes virilis</i>

Wood, Paul M.; Visentin, Louis P.

doi:10.1002/jmor.1051230413

Cited by 34 publications

(13 citation statements)

References 14 publications

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“…The results obtained for F. indicus are in agreement with the general view that three circulating haemocyte populations exist in crustaceans (Bauchau, 1981), although various authors have adopted various terminologies as well as different classification schemes based on size, shape, staining characteristics, and the presence or absence of granules (George & Nichols, 1948;Wood & Visentin, 1967;Stang-Voss, 1971;Bauchau & De Brouwer, 1972;Ravindranath, 1980;Cornick & Stewart, 1978;Smith & Ratcliff, 1978;Martin et al, 1987;Hose et al, 1990).…”

Section: Discussionsupporting

confidence: 83%

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Fine Structure of the Haemocytes of the Indian White Shrimp, Fenneropenaeus Indicus (H. Milne Edwards, 1837)

Laxmilatha¹,

Laxminarayana²

2004

Crustac

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Three types of circulating haemocytes have been identified in the haemolymph of the Indian white shrimp, Fenneropenaeus indicus, by electron microscopy. The ultrastructure of an agranulocyte, a dense granulocyte, and a semi-dense granulocyte, are described. The possible presence of a fourth type of haemocyte, viz., the cyanocyte, is discussed. The ultrastructure of a special type of haemocyte found in the haemolymph of shrimps with a developing ovary is described.

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Section: Discussionsupporting

confidence: 83%

“…Based on cytochemical observations, Wood & Visentin (1967) and Wood et al (1971), described a hyaline cell, a small granulocyte, and a large granulocyte in Orconectes virilis (Hagen, 1870). Stang-Voss (1971) described only one cell type in Astacus astacus, the amoebocyte.…”

Section: Discussionmentioning

confidence: 99%

Fine Structure of the Haemocytes of the Indian White Shrimp, Fenneropenaeus Indicus (H. Milne Edwards, 1837)

Laxmilatha¹,

Laxminarayana²

2004

Crustac

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“…Crustaceans do not have a specifi c immunological system, but they have an inner line of defense based on phagocytic cells, mainly hemocytes, capable of recognizing and eliminating foreign material, and on hemolymph [Shivers, 1977;Gargioni and Barracco, 1998]. Based on morphological characteristics [Toney Jr., 1958;Wood and Visentin, 1967;Hose et al, 1990;Rodriguez et al, 1995], crustacean hemocytes are classifi ed as hyaline cells, small granulocytes and large granulocytes. Granulocyte cytoplasm observed by electron microscopy shows various homogeneous and electron-dense large granules, and the nucleus displays masses of condensed chromatin [Gargioni and Barracco, 1998].…”

Section: Discussionmentioning

confidence: 99%

Ultrastructural Study of Normal and Degenerating Nerve Fibers in the Protocerebral Tract of the Crab <i>Ucides cordatus</i>

Corrêa¹,

Allodi²,

Martínez³

2005

Brain Behav Evol

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Wallerian degeneration is a very well described phenomenon in the vertebrate nervous system. In arthropods, and especially in crustaceans, nerve fiber degeneration has not been described extensively. In addition, literature shows that the events do not follow the same patterns as in vertebrates. In this study we report, by qualitative and quantitative ultrastructural analyses, the features and time course of the protocerebral tract degeneration following extirpation of the optic stalk. No remarkable changes were observed seven days after lesion. After 28 days the protocerebral tracts presented apparently preserved small and large diameter axons and some degenerating medium axons, with irregular contours and empty-looking aspect of the axoplasm. Forty days after the ablation of the optic stalks, both small (type I) and medium (type II and III) axons revealed signs of partial or total degeneration, but large nerve fibers (type IV) were still intact. After 45 days, the tract showed signs of advanced stage of degeneration and, apart from large axons, normal-looking fibers were almost absent. At these 3 last time points, degenerating axons displayed different electron densities and aspects, probably correlating to different onset times of the process. In addition, cells with granules in their cytoplasm, possibly hemocytes, were quite distinct, especially at 40 and 45 days after axotomy. These cells might share with glial cells the function of phagocytosis of cellular debris during the protocerebral tract degeneration. Quantitative analysis showed that the number of degenerating fibers increased significantly from 28 to 40 days after lesion, whereas the number of normal fibers decreased accordingly. Measurements of cross-sectional areas of normal and degenerating axons showed that types II and III (medium) start to degenerate before type I (small). Type IV (large) axons do not degenerate, even after 40 days. Therefore, we can conclude that degeneration in these afferent fibers starts late after axotomy, but proceeds at a faster rate afterwards until the complete degeneration of small and medium axons.

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“…Hyaline cells initiate haemolymph coagulation and hardening of the exoskeleton after moulting (Vacca and Fingerman, 1983;Omori et al, 1989). Granulocytes play diverse roles, being involved in phagocytosis, agglutination, coagulation, encapsulation and storage of haemocyanin and glycoproteins (Wood and Visentin, 1967;Busselen, 1970;Stang-Voss, 1971;Wood et al, 1971;Ravindranath, 1980). Light microscopic and ultrastructural investigations with regard to the morphological and functional aspects of haemocytes have been extensively studied in economically important marine decapods.…”

Section: Introductionmentioning

confidence: 99%

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Padmanabhan¹,

Raghavan²,

Kenchappa³

2017

Turk. J. Fish. Aquat. Sci.

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The light and ultrastructural observations on haemocyte profile of the freshwater crab Travancoriana schirnerae demonstrated three cell types: agranulocyte, granulocyte I and granulocyte II. Agranulocytes are the smallest of the haemocyte types, comprised 38% of the haemocytes, devoid of granules and showed high nucleoprotoplasmic ratio. Their cytoplasm contained numerous free ribosomes, vesicles of smooth endoplasmic reticulum, few mitochondria with parallel cristae and vacuoles. Granulocytes I (37%) are the largest of the haemocyte types, characterized by the presence of numerous granules (26 to 61) of varying size, shape and densities and organelles like mitochondria, free ribosomes and peripheral vacuoles and displayed low nucleoprotoplasmic ratio. Granulocytes II (25%) contained large electron dense granules (10 to 23) and organelles like free ribosomes and vacuoles and showed intermediate nucleoprotoplasmic ratio. Unlike granulocytes, agranulocytes exhibited prominent pseudopodial projections suggesting a phagocytory function. This study revealed the unusual occurrence of a binucleate agranulocyte and a rare phenomenon called clasmatosis of granulocyte II, wherein part of the cell fragments off along with cytoplasmic contents devoid of nucleus.

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Histological and histochemical observations of the hemolymph cells in the crayfish, Orconectes virilis

Cited by 34 publications

References 14 publications

Fine Structure of the Haemocytes of the Indian White Shrimp, Fenneropenaeus Indicus (H. Milne Edwards, 1837)

Fine Structure of the Haemocytes of the Indian White Shrimp, Fenneropenaeus Indicus (H. Milne Edwards, 1837)

Ultrastructural Study of Normal and Degenerating Nerve Fibers in the Protocerebral Tract of the Crab <i>Ucides cordatus</i>

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