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Effect of chitosan quaternary ammonium salt on the growth and microcystins release of Microcystis aeruginosa

机译：壳聚糖季铵盐对微囊杆菌铜绿假单胞菌生长和微囊藻酸的影响

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摘要

Developing effective methods to control Microcystis aeruginosa (M. aeruginosa) bloom is significant for repelling the adverse impact from hepatotoxic microcystins (MCs). Chitosan quaternary ammonium salt (HTCC), a water-soluble derivative of chitosan, shows excellent antioxidant and antibacterial properties. The present study was the first to research the application potential of HTCC in M. aeruginosa control. Five experimental groups with different doses of HTCC (0, 0.6 mg L-1, 1.2 mg L-1, 2.4 mg L-1, and 4.8 mg L-1) were built to explore the effects of HTCC on the growth and physiological changes of M. aeruginosa and the release of intracellular matter. The results indicated that the growth of M. aeruginosa was effectively inhibited by HTCC, and the inhibition efficiency was dependent on dosage within 7 days (d). Especially for the treatment with 4.8 mg L-1 HTCC, the inhibitory rate remained above 93.6% after 7 d exposure. However, the integrity of M. aeruginosa cells treated with 2.4 and 4.8 mg L-1 HTCC may be damaged and partial MCs were released. Furthermore, the release of MCs in the 1.2 mg L-1 HTCC treated groups was significantly lower than that of the control sample. To balance the inhibition efficiency of M. aeruginosa and the release of MCs, 1.2 mg L-1 was chosen as the appropriate dose for inhibiting the growth of M. aeruginosa and reducing the release of MCs. HTCC could damage the antioxidant defense system of M. aeruginosa and exhibit the inhibitive property. The results demonstrated HTCC can be used as an effective and safe inhibitor to control algal blooms.
机译：制定有效的控制微囊杆菌铜绿假单胞菌（M. Aerginosa）绽放的方法对于排斥来自肝毒性微囊藻（MCS）的不利影响是显着的。壳聚糖季铵盐（HTCC），壳聚糖的水溶性衍生物，显示出优异的抗氧化剂和抗菌性能。本研究是第一个研究M.铜绿假单胞菌控制中HTCC的应用潜力。采用不同剂量的HTCC（0,0.6mg L-1，1.2mg L-1，2.4mg L-1和4.8mg L-1）的五种实验组，以探讨HTCC对生长和生理变化的影响铜绿假单胞菌和细胞内物质的释放。结果表明，HTCC有效抑制了M.铜绿假单胞菌的生长，抑制效率依赖于7天内的剂量（D）。特别是对于4.8mg L-1 HTCC的处理，7 D暴露后，抑制率仍然高于93.6％。然而，用2.4和4.8mg L-1 HTCC处理的M.铜绿素体细胞的完整性可能被损坏，并且释放部分MCS。此外，1.2mg L-1 HTCC处理基团中MCS的释放显着低于对照样品的基团。为了平衡M.铜绿假单胞菌的抑制效率和MCS的释放，选择1.2mg L-1作为抑制M.铜绿假单胞菌生长并减少MCS释放的适当剂量。 HTCC可能损害M.铜绿假单胞菌的抗氧化防御系统，表现出抑制性质。结果证明HTCC可用作控制藻类绽放的有效和安全的抑制剂。

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  • 来源
    《RSC Advances》 |2016年第84期|共9页
  • 作者

    Zhu Yaowen; Pei Haiyan; Hu Wenrong; Jin Yan; Xu Hangzhou; Ren Ying; Xue Di;

  • 作者单位

    Shandong Univ Sch Environm Sci &

    Engn Jinan 250100 Peoples R China;

    Shandong Univ Sch Environm Sci &

    Engn Jinan 250100 Peoples R China;

    Shandong Univ Sch Environm Sci &

    Engn Jinan 250100 Peoples R China;

    Shandong Univ Sch Environm Sci &

    Engn Jinan 250100 Peoples R China;

    Shandong Univ Sch Environm Sci &

    Engn Jinan 250100 Peoples R China;

    Shandong Univ Sch Environm Sci &

    Engn Jinan 250100 Peoples R China;

    Shandong Univ Sch Environm Sci &

    Engn Jinan 250100 Peoples R China;

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