MORPHOLOGICAL AND FUNCTIONAL CHARACTERIZATION OF THE HEMOCYTES OF THE SCALLOP, CHLAMYS FARRERI

WEIZHU ZHANG; XINZHONG WU; JINGFENG SUN; DENGFENG LI

doi:10.2983/0730-8000(2005)24[931:MAFCOT]2.0.CO;2

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1 December 2005 MORPHOLOGICAL AND FUNCTIONAL CHARACTERIZATION OF THE HEMOCYTES OF THE SCALLOP, CHLAMYS FARRERI

WEIZHU ZHANG, XINZHONG WU, JINGFENG SUN, DENGFENG LI

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J. of Shellfish Research, 24(4):931-936 (2005). https://doi.org/10.2983/0730-8000(2005)24[931:MAFCOT]2.0.CO;2

Abstract

Light, transmission and scanning electron microscopical studies were carried out to characterize the hemocytes of the scallop Chlamys farreri (Jones & Preston). Five types of hemocytes were recognized: type 1 small hyalinocytes (2.44 ± 0.11 μm, 45% to 50%), type 2 large hyalinocytes (4.83 ± 0.28 μm, 15–20%), type 3 small granulocytes (4.07 ± 0.15 μm, 15% to 20%), type 4 medium granulocytes (7.20 ± 0.26 μm, 20–25%) and type 5 large granulocytes (13.87 ± 0.73 μm, 3% to 5%). Granulocytes showed larger sizes and smaller N/C ratios than hyalinocytes. The mean hemocyte concentration was about (3.03 ± 0.11) × 107 cells mL−1. Among hemocytes, 42.6% are granular cells and 57.4% are agranular cells. These gave a relatively systematic classification scheme for hemocytes of Chlamys farreri. Three kinds of granules were identified: high electron-dense granules, low electron-dense granules and medium electron-dense granules based on TEM studies. Both granulocytes and hyalinocytes showed phagocytic response to the two strains of bacteria, E. coli and Rickettsia-like organisms. The phagocytic ability of granulocyte was significantly higher (30% to 40%) than that of hyalinocyte (4.8% to 14%).

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WEIZHU ZHANG, XINZHONG WU, JINGFENG SUN and DENGFENG LI "MORPHOLOGICAL AND FUNCTIONAL CHARACTERIZATION OF THE HEMOCYTES OF THE SCALLOP, CHLAMYS FARRERI," Journal of Shellfish Research 24(4), (1 December 2005). https://doi.org/10.2983/0730-8000(2005)24[931:MAFCOT]2.0.CO;2

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