Growth competition between Microcystis aeruginosa and Quadrigula chodatii under controlled conditions
Growth competition between Microcystis aeruginosa and Quadrigula chodatii under controlled conditions
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DOI：
10.1007/s10811-012-9890-5
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发表时间：
2013-04
影响因子：
3.3
通讯作者：
Ping Zhang;Chunmei Zhai;Xiaoxian Wang;Changhong Liu;Jihong Jiang;Ya-rong Xue
中科院分区：
文献类型：
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作者：
Ping Zhang;Chunmei Zhai;Xiaoxian Wang;Changhong Liu;Jihong Jiang;Ya-rong Xue
蓝藻是太湖水华的优势物种。了解藻类之间的竞争对于控制淡水生态系统中水华形成和爆发的策略非常重要。在本研究中，我们证明蓝藻铜绿微囊藻PCC7820和绿藻Quadrigula chodatiiFACHB-1080在共培养条件下表现出很强的竞争抑制关系，后者抑制前者。有几个因素影响两个物种之间的竞争关系，包括营养、温度和有机/无机化合物。 chodatii 强烈抑制 M.通过在共培养过程中抑制氮利用来促进铜绿藻生长。在富营养化条件下，温度也是两个物种之间竞争能力的一个有影响力的决定因素：在较低温度（15°C）下，M。铜绿假单胞菌生长得比Q好。 chodatii，但差异不显着 (p> 0.05)，而在较高温度 (25 °C、35 °C) 下，Q. chodatiig 明显优于 M。铜绿假单胞菌(p< 0.05)。此外，Q. chodatiifiltrate 强烈抑制 M. 的生长。铜绿假单胞菌。使用气相色谱质谱 (GC/MS) 对单一培养和共培养的藻类培养滤液的粗提物进行分析表明，藻类代谢物，如邻苯二甲酸二丁酯和β-谷甾醇，可能在藻类之间的竞争中发挥关键作用。
Cyanobacteria are the dominant bloom-forming species in Lake Taihu. Understanding the competition among algae is important to control strategies for bloom formation and outbreaks in freshwater ecosystems. In this study, we demonstrate that the cyanobacteriumMicrocystis aeruginosaPCC7820 and the green algaQuadrigula chodatiiFACHB-1080 exhibit a strong competitive inhibitory relationship under co-culture conditions, with the latter strain inhibiting the former. Several factors influence the competitive relationship between the two species, including nutrition, temperature, and organic/inorganic compounds.Q. chodatiistrongly inhibitedM. aeruginosagrowth through the inhibition of nitrogen utilization during co-culture. Temperature was also an influential determinant of the competition capacity between the two species under eutrophic conditions: at lower temperatures (15 °C),M. aeruginosagrew better thanQ. chodatii, but the difference was not significant (p> 0.05), whereas at higher temperatures (25 °C, 35 °C),Q. chodatiigrew significantly better thanM. aeruginosa(p< 0.05). Furthermore, theQ. chodatiifiltrate strongly inhibited the growth ofM. aeruginosa. An analysis of the crude extracts of the algae culture filtrates from uni- and co-cultures using gas chromatography mass spectrometry (GC/MS) indicated that algal metabolites, such as dibutyl phthalate and beta-sitosterol, might play a key role in the competition between algae.