Physiological response and removal ability of freshwater diatom Nitzschia palea to two organophosphorus pesticides
Physiological response and removal ability of freshwater diatom Nitzschia palea to two organophosphorus pesticides
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淡水硅藻菱形藻对两种有机磷农药的生理响应及去除能力
DOI：
10.1080/02757540.2020.1784883
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发表时间：
2020-08
影响因子：
2.5
通讯作者：
Yan Liu
中科院分区：
文献类型：
--
作者：
Yuhang Wang;Weijie Mu;Xiaoli Sun;Xinxin Lu;Yawen Fan;Yan Liu
摘要有机磷农药是目前应用最广泛的有机农药之一，它对水生生物造成了极大的威胁。本文从生理、生化、形态变化和去除能力等方面分析了内菱形藻对乙酰甲胺磷和敌百虫杀虫剂暴露的响应机制。结果表明，N.敌百虫对内稃的生长有抑制作用，在暴露7 d时，内稃细胞密度显著降低。尽管乙酰甲胺磷处理后硅藻的生长几乎没有受到抑制，但在50 mg L-1乙酰甲胺磷处理7天后发现硅藻瓣膜明显异常形态。同时，杀虫剂对N.内稃此外，乙酰甲胺磷和敌百虫诱导硅藻体内超氧化物歧化酶（SOD）和过氧化氢酶（CAT）的活性，这两种酶对各种环境胁迫具有防御作用。进一步的分析表明，丙二醛（MDA）和胞外多糖（EPS）的含量增加暴露于两种杀虫剂。N.内稃对乙酰甲胺磷的去除率为24.44-32.75%。N.内稃对乙酰甲胺磷和敌百虫暴露的反应表明，硅藻在应对敌百虫引起的氧化应激时发生了适应性变化。
ABSTRACT Organophosphorus pesticides, one of the most extensively used organic chemicals to control several insect pests, making them threaten the aquatic creatures. Here, we analysed the response mechanism of Nitzschia palea to insecticides (acephate and trichlorfon) exposure, through physiological, biochemical, morphological changes and the removal ability. Results showed that the growth of N. palea was inhibited by trichlorfon, with the cell density was significantly decreased at 7 days of exposure. Although the diatom growth was hardly inhibited after acephate treatment, the diatom valve significantly abnormal morphology be found at 50 mg L−1 acephate treatment after 7 days. Meanwhile, these insecticides had no negative effect on the chlorophyll a content of N. palea. In addition, acephate and trichlorfon induced the activities of superoxide dismutase (SOD) and catalase (CAT) in the diatom, which play a defensive role against various environmental stresses. For further analysis revealed that the content of malondialdehyde (MDA) and extracellular polysaccharides (EPS) increased on exposure to both insecticides. N. palea also promoted 24.44–32.75% removal of acephate. The biochemical changes in N. palea on exposure to acephate and trichlorfon indicate that the diatom undergoes an adaptive change in response to the insecticides-induced oxidative stress.
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影响因子：
4.1
作者：
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通讯作者：
R. Brain;Joshua R. Arnie;J. Porch;Alan J. Hosmer
影响因子：
3.3
作者：
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影响因子：
6.1
作者：
Cai, Xiyun;Liu, Weiping;Sheng, Guangyao
通讯作者：
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影响因子：
4.2
作者：
H. Tao;Zhihong Xu;J. Rinklebe;X. Huo
通讯作者：
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