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氮磷限制条件下螺旋鱼腥藻伪空胞合成及其浮力特征

王 宁 储昭升 代 然 孔祥云 施春红

王 宁, 储昭升, 代 然, 孔祥云, 施春红. 氮磷限制条件下螺旋鱼腥藻伪空胞合成及其浮力特征[J]. 环境科学研究, 2015, 28(2): 228-233.
引用本文: 王 宁, 储昭升, 代 然, 孔祥云, 施春红. 氮磷限制条件下螺旋鱼腥藻伪空胞合成及其浮力特征[J]. 环境科学研究, 2015, 28(2): 228-233.
WANG Ning, CHU Zhaoheng, DAI Ran, KONG Xiangyun, SHI Chunhong. Study on Formation of Gas Vesicles of Anabaena spiroides under Nitrogen-Limited and Phosphorus-Limited Conditions[J]. Research of Environmental Sciences, 2015, 28(2): 228-233.
Citation: WANG Ning, CHU Zhaoheng, DAI Ran, KONG Xiangyun, SHI Chunhong. Study on Formation of Gas Vesicles of Anabaena spiroides under Nitrogen-Limited and Phosphorus-Limited Conditions[J]. Research of Environmental Sciences, 2015, 28(2): 228-233.

氮磷限制条件下螺旋鱼腥藻伪空胞合成及其浮力特征

基金项目: 国家自然科学基金项目(51078341);国家自然科学基金重点项目(50938007)

Study on Formation of Gas Vesicles of Anabaena spiroides under Nitrogen-Limited and Phosphorus-Limited Conditions

  • 摘要: 伪空胞的合成与破裂是蓝藻浮力调节的主要方式. 为研究固氮蓝藻浮力的形成及其调节能力,以螺旋鱼腥藻为代表,在外压作用下将螺旋鱼腥藻伪空胞压破,分别在氮限制〔ρ(TN)为1.65 mg/L,ρ(TP)为1.780 mg/L〕、磷限制〔ρ(TN)为16.50 mg/L,ρ(TP)为0.178 mg/L〕条件下研究伪空胞的合成、藻细胞垂向迁移及漂浮特性. 结果表明:螺旋鱼腥藻的伪空胞完全破裂后,在氮限制条件下,藻细胞恢复浮力(漂浮率>50%)需56 h,伪空胞含量恢复到初始水平(2.47×10-7 μL/cell)需要72 h;而在磷限制条件下伪空胞含量无法恢复到初始水平;氮限制和磷限制条件下螺旋鱼腥藻最大垂向迁移速率分别为1.4和0.8 m/d,磷限制条件对螺旋鱼腥藻伪空胞的合成及恢复更为不利.

     

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