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周洋, 于道德, 胡芯, 郑永华, 唐洪玉. 铅锌胁迫下轮叶黑藻的吸附水平及生理响应[J]. 水生生物学报, 2021, 45(6): 1273-1280. DOI: 10.7541/2021.2020.270
引用本文: 周洋, 于道德, 胡芯, 郑永华, 唐洪玉. 铅锌胁迫下轮叶黑藻的吸附水平及生理响应[J]. 水生生物学报, 2021, 45(6): 1273-1280. DOI: 10.7541/2021.2020.270
ZHOU Yang, YU Dao-De, HU Xin, ZHENG Yong-Hua, TANG Hong-Yu. THE EFFECTS OF LEAD-ZINC STRESS ON ADSORPTION AND PHYSIOLOGICAL RESPONSE OF HYDRILLA VERTICILLATE[J]. ACTA HYDROBIOLOGICA SINICA, 2021, 45(6): 1273-1280. DOI: 10.7541/2021.2020.270
Citation: ZHOU Yang, YU Dao-De, HU Xin, ZHENG Yong-Hua, TANG Hong-Yu. THE EFFECTS OF LEAD-ZINC STRESS ON ADSORPTION AND PHYSIOLOGICAL RESPONSE OF HYDRILLA VERTICILLATE[J]. ACTA HYDROBIOLOGICA SINICA, 2021, 45(6): 1273-1280. DOI: 10.7541/2021.2020.270

铅锌胁迫下轮叶黑藻的吸附水平及生理响应

THE EFFECTS OF LEAD-ZINC STRESS ON ADSORPTION AND PHYSIOLOGICAL RESPONSE OF HYDRILLA VERTICILLATE

  • 摘要: 为探讨铅锌胁迫下轮叶黑藻(Hydrilla verticillate)的吸附水平及生理响应, 分别设置不同Pb2+(浓度梯度为0、0.01、0.05、0.10和0.20 mg/L)、Zn2+(浓度梯度为0、0.05、1.00、2.00和4.00 mg/L)浓度单一和复合胁迫轮叶黑藻28d, 测定其对铅锌的吸附量, 叶绿素a、叶绿素b、丙二醛(MDA)和总抗氧化能力(T-AOC)含量, 以及超氧化物歧化酶(SOD)和过氧化物酶(POD)的活性变化。结果显示: 高浓度(≥1.00 mg/L)的Zn2+可促进轮叶黑藻对Pb2+的吸收, 对Zn2+的吸附主要受Zn2+处理浓度的影响; 低浓度Pb2+和Zn2+可以促进叶绿素的合成, 高浓度(浓度≥1.00 mg/L)胁迫则抑制叶绿素的合成; 受到胁迫时其抗氧化系统会迅速作出反应, 但一定浓度的Pb2+与Zn2+在单一和复合胁迫下, 抗氧化系统受限, 说明抗氧化系统不能正常运转, 机体受到损伤。研究结果为轮叶黑藻在重金属修复中的应用提供一定的理论依据。

     

    Abstract: To investigate the adsorption and physiological response of Hydrilla verticillate under lead-zinc stress, H. verticillata were stressed by lead (Pb2+: 0, 0.01, 0.05, 0.10 and 0.20 mg/L) and zinc (Zn2+: 0, 0.05, 1.00, 2.00 and 4.00 mg/L) with single and composite process for 28 days to measure the adsorption of Pb2+, Zn2+, chlorophyll a, chlorophyll b, malondialdehyde (MDA), total antioxidant capacity (T-AOC), superoxide dismutase (SOD) and peroxidase (POD) activity. The result showed that the Zn2+ absorption was Zn2+ concentration-dependent, and the high concentration of Zn2+ (≥1.00 mg/L) promoted the Pb2+ absorption by H. verticillata; The low concentration of Zn2+ and Pb2+ promoted the synthesis of chlorophyll, while high concentration (≥1.00 mg/L) inhibited the synthesis of chlorophyll. Pb2+ and Zn2+ significantly mediated antioxidant indexes of H. verticillata to damage the organism. The results of this study will provide a theoretical basis for application of H. Verticillata in heavy metal remediation.

     

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