High pH and not allelopathy may be responsible for negative effects of Nodularia spumigena on other algae
High pH and not allelopathy may be responsible for negative effects of Nodularia spumigena on other algae
复制标题
高 pH 值而非化感作用可能是 Nodularia spumigena 对其他藻类产生负面影响的原因
DOI：
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发表时间：
2006
期刊：
影响因子：
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通讯作者：
N. Lundholm
中科院分区：
文献类型：
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作者：
Mia K. Møgelhøj;P. J. Hansen;P. Henriksen;N. Lundholm
水华形成海洋蓝藻Nodularia spumigena Mertens产生有毒化合物节球藻素。在单培养条件下，测定了根瘤菌生长过程中节球菌素的产生和分泌。spumigena和在与隐藻Rhodium salina的混合培养中。大部分毒素产生于细胞内，细胞外的节球菌素直到生长稳定期才被检测到。R.盐藻对N.泡沫。添加纯的节球藻多糖对单培养的红球藻生长没有影响。salina。同样地，当N.在与6种不同浮游植物物种的混合培养实验中测试了spumi-gena。而不是被抑制的化感化合物，测试藻类的生长控制的pH值在培养基中，并通过pH值的耐受性的每个物种参与。因为N. spumigena可以将pH升高到非常高的水平（10.6），它胜过6种浮游植物中的5种。这表明，N. spumigena在自然环境中对N. spumigena在与其他浮游植物物种的竞争。
The bloom forming marine cyanobacterium Nodularia spumigena Mertens produces the toxic compound nodularin. The production and excretion of nodularin during growth were mea- sured in a monoculture of N. spumigena and in a mixed culture with the cryptophyte Rhodomonas salina. Most of the toxin produced was found intracellularly, and extracellular nodularin was not detected until the stationary growth phase. The presence of R. salina did not significantly affect the production and excretion of nodularin by N. spumigena. Addition of pure nodularin did not affect the growth of a monoculture of R. salina. Similarly, no allelopathic effects were found when N. spumi- gena was tested in mixed culture experiments with 6 different phytoplankton species. Instead of being inhibited by an allelopathic compound, the growth of the test algae was controlled by the pH level in the culture media and by the pH tolerance of each species involved. Because N. spumigena can elevate pH up to very high levels (10.6), it out-competed 5 of the 6 phytoplankton species. This suggests that the high pH tolerance of N. spumigena in natural environments might be important for N. spumigena in the competition with other phytoplankton species.
影响因子：
56.9
作者：
C. Mason;K. Edwards;R. E. Carlson;J. Pignatello;F. K. Gleason;J. Wood
通讯作者：
C. Mason;K. Edwards;R. E. Carlson;J. Pignatello;F. K. Gleason;J. Wood