文章摘要
5种水生植物对铜绿微囊藻的抑制与生理影响研究
Allelopathic effect of five aquatic plants on Microcystis aeruginosa
投稿时间:2019-08-09  最后修改时间:2019-11-05
DOI:10.13872/j.1000-0275.2019.0097
中文关键词: 水体富营养化  铜绿微囊藻  水蕹菜  苦草  化感  抑制作用  生理影响
英文关键词: water eutrophication  Microcystis aeruginosa  Ipomoea aquatica  Vallisneria natans  allelopathy  inhibition  physiological effects
基金项目:湖南省重点研发计划项目(2018SK2017)
作者单位E-mail
贾惠雁 中南林业科技大学环境科学与工程学院 865067200@qq.com 
陈永华 中南林业科技大学环境科学与工程学院 chenyonghua3333@163.com 
陈明利 中南林业科技大学环境科学与工程学院 chml18@163.com 
杜露 中南林业科技大学环境科学与工程学院 dl@csuft.edu.cn 
韩良泽 中南林业科技大学环境科学与工程学院 624637476@qq.com 
柳俊 中南林业科技大学环境科学与工程学院 1071378471@qq.com 
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中文摘要:
      采用不同浓度(0 g/L、10 g/L、30 g/L、40 g/L、50 g/L)的种植水比较了菖蒲(Acorus calamus)、黑藻(Hydrilla verticillata)、苦草(Vallisneria natans)、绿狐尾藻(Myriophyllum verticillatum)和水蕹菜(Ipomoea aquatica)对铜绿微囊藻(Microcystis aeruginosa)的抑制能力,探讨了其中抑制能力最佳的种植水对铜绿微囊藻的生理影响。结果表明:5种种植水均对铜绿微囊藻产生了化感抑制作用,且均随浓度升高抑制作用增强,50 g/L苦草和水蕹菜种植水的平均抑藻率分别为90.30%和86.05%。在40 g/L水蕹菜及苦草种植水分别作用下,铜绿微囊藻细胞超氧化物歧化酶(SOD)、过氧化物酶(POD)、过氧化氢酶(CAT)活性于第2~4 d达峰值,此后,藻酶活性开始降低,苦草组藻细胞最终恢复至对照组水平(P>0.05),而水蕹菜组藻细胞最终失活(P<0.05)。各处理组藻丙二醛(MDA)含量先升后降;核酸及非电解质外渗量显著高于对照组(P<0.05);叶绿素a含量显著低于对照组(P<0.05)。研究表明,水生植物种植水能通过破坏铜绿微囊藻生理机制来抑制其生长。本结果可为水生植物控藻研究提供理论依据和参考。
英文摘要:
      The inhibitory effect of aquatic plants (Acorus calamus, Hydrilla verticillata, Vallisneria natans, Myriophyllum verticillatum and Ipomoea aquatica) on Microcystis aeruginosa were assessed, which culturing with different concentration of aquatic plants filtrates (0 g/L, 10 g/L, 30 g/L, 40 g/L and 50 g/L). Results showed that the biomass of M. aeruginsa was suppressed when culturing with the selected 5 aquatic plants filtrates respectively, the inhibitory effects increased with the concentration of filtrates. The average biomass inhibition ratio of Vallisneria natans and Ipomoea aquatica filtrates (50 g/L) to M. aeruginsa were 90.30% and 86.05%, respectively. When culturing in 40g/L Vallisneria natans and Ipomoea aquatica filtrates, the highest activity of superoxide dismutase (SOD), peroxidase (POD) and catalase (CAT) of M. aeruginosa arranged from the 2nd to 4th day, and then decreased gradually to control level (P>0.05) in Vallisneria natans group, which were finally inactivated (P<0.05) in Ipomoea aquatica group. The Malondialdehyde (MDA) content in treatment group increased first and then decreased, the amount of nucleic acid exudation and non-electrolyte extravasation were significantly higher than that in control group (P<0.05), the chlorophyll-a content was significantly lower than that in control group (P<0.05). Aquatic plants play an effective role in destroying the physiological mechanism of Microcystis aeruginosa. The research can provide theoretical basis and reference for algae control by aquatic plants.
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