Abstract:Acute toxicity of monocrotophos on Chromadorina germanica was tested in static culture plate, and effects of monocrotophos on embryonic development and reproduction were also studied. LC50 of the 24, 48 and 96 h were 66.42, 36.94, 16.03 μmol/L,respectively. Monocrotophos significantly inhibited the reproduction of C. germanica. When exposed to 1.0 μmol/L monocrotophos, the number of offspring reduced to 52.9% compared with control, while exposed to 10 μmol/L monocrotophos, neither eggs nor offspring were observed. The sharp reduction of the number of offspring might relate to the interruption of embryo development and damage on testis and ovary. After exposure to 0.1, 1.0, 10.0 μmol/L monocrotophos, the development of embryo was delayed for 1.24, 1.92, 1.96 h, respectively, compared with 17.05 h of the control, showing a dose-effect relationship. Exposure to 10.0 μmol/L monocrotophos caused no hatch of embryo. Besides, the ultrastructure of testis and ovary showed great damage under exposure of 10.0 μmol/L monocrotophos. The sharp reduction of the number of offsproing under exposure of monocrotophos might relate to the interruption of embryo development and damage on testis and ovary.
王摆, 汝少国, 王蔚. 久效磷对细小色矛线虫胚胎发育和繁殖的影响[J]. 中国环境科学, 2009, 29(5): 543-547.
WANG Bai, RU Shao-Guo, WANG Wei. Effect of monocrotophos on embryonic development and reproduction of a marine nematode Chromadorina germanica. . CHINA ENVIRONMENTAL SCIENCECE, 2009, 29(5): 543-547.