互花米草水浸液对控制铜绿微囊藻水华的化感作用。
The allelopathic effects of aqueous extracts from Spartina alterniflora on controlling the Microcystis aeruginosa blooms.
机构信息
College of Environmental Science and Engineering, Qingdao University, Qingdao 266071, China.
College of Environmental Science and Engineering, Qingdao University, Qingdao 266071, China.
出版信息
Sci Total Environ. 2020 Apr 10;712:136332. doi: 10.1016/j.scitotenv.2019.136332. Epub 2019 Dec 26.
The Microcystis aeruginosa (M. aeruginosa) blooms and Spartina alterniflora (S. alterniflora) invasion have caused serious damage to local ecological environment. This study validated the possibility of transforming the abandoned S. alterniflora into a biological resource to inhibit M. aeruginosa blooms through allelopathy. The results showed that the inhibitory effect became stronger with the increasing S. alterniflora concentration by decreasing chlorophyll a and weakening photosynthesis when S. alterniflora aqueous extract concentration was over 0.05 g/mL. The results of GC-MS showed that Cyclohexane, Heptane, 2-Cyclohexen-1-one, Hexadecanoic acid, 2,4-Di-tert-butylphenol and Hydrocinnamic acid may be the main allelochemicals. In addition, the S. alterniflora aqueous extract had little effect on the relative abundance and diversity of microbial communities in the culture system. This study provided a novel idea of controlling the M. aeruginosa blooms using the rapidly expanding S. alterniflora.
铜绿微囊藻（M. aeruginosa）水华和互花米草（S. alterniflora）入侵对当地生态环境造成了严重破坏。本研究通过化感作用验证了将废弃的互花米草转化为生物资源来抑制铜绿微囊藻水华的可能性。结果表明，当互花米草水提物浓度超过 0.05g/mL 时，通过降低叶绿素 a 和削弱光合作用，抑制效应随着互花米草浓度的增加而增强。GC-MS 结果表明，环己烷、庚烷、2-环己烯-1-酮、十六烷酸、2,4-二叔丁基苯酚和肉桂酸可能是主要的化感物质。此外，互花米草水提物对培养系统中微生物群落的相对丰度和多样性影响较小。本研究为利用迅速扩张的互花米草来控制铜绿微囊藻水华提供了新的思路。
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