Fig. 3.
Variation of NOS activity in haemocytes of F. chinensis after WSSV infection. ((—♦—) NOS activity in haemocytes of healthy shrimps after incubation with l-arginine for 8 h, (—♢—) NOS activity in haemocytes of healthy shrimps after incubation with l-arginine and LPS for 8 h, (- -♢- -) NOS activity in haemocytes of WSSV infected shrimps after incubation with l-arginine for 8 h, (- -♦- -) NOS activity in haemocytes of WSSV infected shrimps after incubation with l-arginine and LPS for 8 h.) (A) Variation of NOS activity indicated by the analytical results of l-citrulline. (B) Variation of NOS activity indicated by the analytical results of total nitrite/nitrate.