Allelopathic influence of low concentration Microcystis aeruginosa on Egeria densa under different light intensities
Allelopathic influence of low concentration Microcystis aeruginosa on Egeria densa under different light intensities
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DOI：
10.1080/02757540.2020.1798939
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发表时间：
2020-08
影响因子：
2.5
通讯作者：
M. D. H. J. Senavirathna;Guligena Muhetaer;Liu Zhaozhi;T. Fujino
中科院分区：
文献类型：
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作者：
M. D. H. J. Senavirathna;Guligena Muhetaer;Liu Zhaozhi;T. Fujino
摘要在这项研究中，在不同的光合有效辐射（PAR）强度（0、50、100、200和300 μmol m−2 s−1）下，将密集叶牛鞭草（Egeria densa）植物暴露于低浓度（OD 730 = 0. 04）铜绿微囊藻（Microcystis aeruginosa）中7天。实验在培养箱内的受控条件下进行。H2O2含量，抗氧化反应，色素沉着，叶绿素荧光参数进行了测定。测定了E.在50和100 μmol m−2 s−1 PAR强度下，E. densa在其他强度下的表现相对较好。当暴露于M。铜绿假单胞菌（E.aeruginosa）的培养，使E.密度。在不利的光照条件下，M.铜绿假单胞菌（E. densa也在场。即使在低浓度下，M.水体中的铜绿假单胞菌对E. densa pigmentation and physiological parameters，though E. densa对M.铜绿菌生长建议进一步研究评价E.长时间暴露于M.铜绿假单胞菌（E. densa on M.铜绿。
ABSTRACT In this study, Egeria densa plants were exposed to a low concentration of (OD730 = 0.04) Microcystis aeruginosa for seven days, under different photosynthetically active radiation (PAR) intensities (0, 50, 100, 200, and 300 µmol m−2 s−1). Experiments were conducted under controlled conditions inside incubators. The H2O2 content, antioxidant responses, pigmentation, and chlorophyll fluorescence parameters were measured. The biochemical parameters of E. densa varied with PAR intensity; under the 50 and 100 µmol m−2 s−1 PAR intensities, E. densa performed relatively better than under other intensities. When exposed to M. aeruginosa, the levels of the measured biochemical parameters reduced in E. densa. Under unfavourable light conditions, the optical density of M. aeruginosa was also reduced when E. densa was also present. Even at low concentrations, the presence of M. aeruginosa in the water can have a negative effect on E. densa pigmentation and physiological parameters, though E. densa also has negative effects on M. aeruginosa growth. Further studies are recommended to evaluate the responses of E. densa after prolonged exposure to M. aeruginosa and the effects of E. densa on M. aeruginosa.