XU Xiaojin, WENG Zhaohong, WANG Jun, SU Yongquan. Ontogeny of immune organs during early development stage of P.crocea[J]. Acta Oceanologica Sinica, 2007, (6): 72-82.
Citation:
XU Xiaojin, WENG Zhaohong, WANG Jun, SU Yongquan. Ontogeny of immune organs during early development stage of P.crocea[J]. Acta Oceanologica Sinica, 2007, (6): 72-82.
XU Xiaojin, WENG Zhaohong, WANG Jun, SU Yongquan. Ontogeny of immune organs during early development stage of P.crocea[J]. Acta Oceanologica Sinica, 2007, (6): 72-82.
Citation:
XU Xiaojin, WENG Zhaohong, WANG Jun, SU Yongquan. Ontogeny of immune organs during early development stage of P.crocea[J]. Acta Oceanologica Sinica, 2007, (6): 72-82.
Department of Oceanography, Institute of Subtropical Oceanography, Xiamen University, Xiamen 361005, China;Key Laboratory of Science and Technology for Aquaculture and Food Safety, Fisheries College, Jimei University, Xiamen 361021, China
2.
Key Laboratory of Science and Technology for Aquaculture and Food Safety, Fisheries College, Jimei University, Xiamen 361021, China
3.
Department of Oceanography, Institute of Subtropical Oceanography, Xiamen University, Xiamen 361005, China
A histological and ultrastructural study was performed on the development of the head kidney,thymus,and spleen in Pseudosciaena crocea aging in range from just hatching to the 60th day after hatching(DAH).Head kidney was first present on the 3rd DAH.Primordial haemopoietic stem cells were first observed in the head kidney which rapidly differentiate into different cellular types.Progenitor spleen was present on the 4th DAH,located close to the gut,which soon became rich in blood capillaries,red blood cells and thrombocytes.The thymus was obvious on the 4th DAH,and was located on either side of the upper corner of the opercular cavity,closely under the membrance of the opercuhr cavity.The thymus was the last lymphoid organ to appear but showed a quick development.This organ seemed to originate from haemopoietic stem cells migrating from the head region of the kidney.The thymus consisted of outer thymocytic and inner epithelioid zones.There was no obvious demarcation between them,but both zones were visible.Small lymphocytes appeared,or lymphoid organs become lymphoid,in the sequence thymus,head kidney and spleen.Only a small number of lymphocytes appeared in the later stages.Non-specific systems may play an important role in the immunocompetence mechanisms of P.crocea during its early development stage.
DownLoad: