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生态学杂志 ›› 2010, Vol. 29 ›› Issue (09): 1777-1781.

• 研究报告 • 上一篇    下一篇

微囊藻毒素-LR在罗非鱼(Oreochromis niloticus)体内的动态分布

陈家长1,2**,张美娜2,胡庚东1,瞿建宏1,孟顺龙1,范立民1   

  1. 1中国水产科学研究院淡水渔业研究中心| 中国水产科学研究院内陆渔业生态环境和资源重点开放实验室| 江苏无锡214081;2 南京农业大学无锡渔业
    学院| 江苏无锡 214081
  • 出版日期:2010-09-08 发布日期:2010-09-08

Dynamic distribution of microcystin-LR in tilapia (Oreochromis niloticus) body.

CHEN Jia-zhang1,2, ZHANG Mei-na2, HU Geng-dong1, QU Jian-hong1, MENG Shun-long1, FAN Li-min1   

  1. 1Key Open Laboratory of Ecological Environment and Resources of Inland Fisheries, Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Wuxi 214081, Jiangsu, China|2Wuxi Fishery College, Nanjing Agricultural University, Wuxi 214081, Jiangsu, China
  • Online:2010-09-08 Published:2010-09-08

摘要: 应用腹腔注射染毒法,研究不同作用时间下微囊藻毒素-LR(MC-LR)在罗非鱼各组织器官的动态分布。结果表明:除罗非鱼肌肉中MC-LR含量低于检出限(用ND表示未检出)外,罗非鱼肝脏、血清、胆囊、鳃、肠道都有MC-LR检出;且各组织器官MC-LR残留量的分布有明显的区别,其中以肝脏中残留量的平均值为最高,其变化区间为0.902~4.938 mg·kg-1,血清、胆囊、鳃、肠道的MC-LR残留量变化区间分别为ND~0.390 mg·L-1、ND~0.236 mg·kg-1、0.0134~0.0369 mg·kg-1、0.007~0.016 mg·kg-1;染毒后84 h,罗非鱼肝脏、鳃、血清、胆囊中的MC-LR残留量都显著降低,且血清和胆囊中的MC-LR含量低于检出限,表明罗非鱼对MC-LR具有很强的解毒机能;染毒后36 h,胆囊和肝脏中的MC-LR残留量骤然下降,由此推测胆囊和肝脏可能是罗非鱼对MC-LR的主要解毒器官;试验期间,肌肉中MC-LR含量始终低于检出限,表明低剂量的MC摄入不会在罗非鱼肌肉中造成明显的残留。

关键词: 冬小麦, 作物光合, 蒸腾, 水分利用效率

Abstract: By the method of intraperitoneal injection, this paper studied the dynamic distribution of microcystin-LR (MC-LR) in the muscle, liver, serum, gallbladder, gill, and intestine of tilapia (Oreochromis niloticus). During the experiment, MC-LR was detected in the liver, serum, gallbladder, gill, and intestine, but not detected in the muscle. A distinct difference was observed in the MC-LR residues in different tissues or organs. The MC-LR residue was the highest (0.902-4.938 mg·kg-1) in liver, and was in the range of undetected  to 0.390 mg·L-1 in serum, undetected  to 0.236 mg·kg-1 in gallbladder, 0.0134-0.0369 mg·kg-1 in gill, and 0.007-0.016 mg·kg-1 in intestine, respectively. At 84 h after injection, the MC-LR residue in the liver, gill, serum, and gallbladder decreased significantly, and no MC-LR was detected in serum and gallbladder, which meant that O. niloticus had very strong detoxic ability on MC-LR. The MC-LR concentration in the liver and gallbladder had a sharp decrease at 36 h after injection, suggesting that liver and
 gallbladder could be the main detoxic organs of MC-LR. No MC-LR was detected in the muscle during the experiment, which meant that MC-LR could not be accumulated in muscle when O. niloticus was injected with low dosage MC-LR.

Key words: Winter wheat, Photosynthesis, Transpiration, Water use efficiency