多氯联苯对鸡胚性腺发育的影响

被引:4
作者
方昌阁
张才乔
乔惠理
夏国良
陈耀星
不详
机构
[1] 中国农业大学生物学院
[2] 中国农业大学动物医学院 北京
[3] 北京
[4] 北京
关键词
鸡胚; 多氯联苯; 性腺; 性分化;
D O I
暂无
中图分类号
X174 [环境动物学];
学科分类号
摘要
研究了多氯联苯(PCB)对鸡胚胎期性腺发育和生殖细胞分化的影响.在入孵前将PCB(Aroclor1254,剂量为 0~100μg/枚)注入海兰种蛋卵黄内.取出雏鸡的性腺并进行组织学研究.结果表明:雄性雏鸡的睾丸结构发生了明显改变,与对照组相比,其横截面积、精细管直径和精细管的相对面积均显著减少.在100μg/枚组,大部分精细管解体甚至消失,精细胞的分化受到了不同程度的抑制,几乎所有生殖细胞都发生了核固缩和胞质空泡化.相反,处理PCB后雌性雏鸡的左侧卵巢横截面积、皮质厚度和皮质内的卵母细胞数均比对照组明显增加.只有个别的卵母细胞发生了核固缩和胞质空泡化.研究表明PCB干扰鸡胚性腺的发育,并揭示了PCB对性腺发育和配子分化影响的性别差异,即PCB抑制精原细胞的分化却促进卵原细胞的分化.
引用
收藏
页码:1094 / 1097
页数:4
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