南京大学学报(自然科学版) ›› 2012, Vol. 48 ›› Issue (6): 774779.
蒋丽娟1,尹颖1**,尹大强2,郭红岩1,杨柳燕1,王晓蓉1
Jiang Li-Juan1,Yin Ying1,Yin Da-Qiang2,Guo Hong-Yan1,Yang Liu-Yan1,Wand Xiao-Rong1
摘要: 本文旨在研究水体中腐植酸(humic acid, HA)对芘胁迫下鲫鱼肝脏中富集花,活性氧的诱导及氧化损伤的影响.通过静态模拟实验,在水体中不同浓度(0,0. 05,0. 1,0. 5, 1. 0和2. 5 mg/I.)的HA与芘(0.05 mg/I.)共同暴露10天后,取鲫鱼肝脏,分析其中芘的富集量、活性氧自由基的诱导信号、脂质过氧化产物丙二醛(MDA)含量以及抗氧化系统发生的变化.结果发现,随着HA浓度的增加,花在鲫鱼月+脏中的富集降低;0. 06mg/L和0. 1 mg/L的HA显著诱导鲫鱼肝脏产生活性氧自由基,但随着HA浓
度升高,这种诱导效应降低;0. 6 mg/Z,和1. 0 mg/L H A可以使肝脏中MDA含量显著降低;三种抗氧化系统酶超氧化物歧化酶,过氧化氢酶,谷肤甘肤一分转移酶活性及谷肤甘肤含量因HA的加入均显示先升高后降低的趋势.本文认为,HA降低芘在螂角肝脏中的富集,并改变芘对鲫鱼的生物效应,减轻芘对鲫鱼产生的氧化损伤.
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