Dissolved nitrogen form mediates phycocyanin content in cyanobacteria
Dissolved nitrogen form mediates phycocyanin content in cyanobacteria
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DOI：
10.1111/fwb.13892
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发表时间：
2022-03
影响因子：
2.7
通讯作者：
Matthew F. Gladfelter;Riley P. Buley;A. Belfiore;Edna G. Fernandez‐Figueroa;Bridget L. Gerovac;Nicole D. Baker;Alan E. Wilson
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文献类型：
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作者：
Matthew F. Gladfelter;Riley P. Buley;A. Belfiore;Edna G. Fernandez‐Figueroa;Bridget L. Gerovac;Nicole D. Baker;Alan E. Wilson
1.在水生系统中，化学还原的氮形态正在增加，并开始达到以前没有测量到的浓度。尽管如此，与氧化形态相比，很少有研究考察减少氮素形态的潜力，以鼓励过量的氮素储存，并促进藻华的寿命。2.利用1,100-L塑料滩涂进行了为期两周的田间脉冲施氮试验，研究了蓝藻对硝酸盐、氨氮和尿素三种氮素形态(按600微克N/L添加)的响应。细胞色素和细胞计数被用来计算细胞特定的色素浓度，细胞相关的微囊藻毒素浓度也被测量以检查毒素对氮源变化的反应。3.结果表明，施氮后72小时，随着藻蓝蛋白含量的增加，胞外氮迅速下降。铵和尿素处理有更多的
1. Chemically reduced nitrogen forms are increasing in aquatic systems and beginning to reach concentrations not previously measured. Despite this, little research has examined the potential of reduced nitrogen forms to encourage excess nitrogen storage and promote algal bloom longevity compared to oxidised forms. 2. A 2- week field, pulse- application experiment was carried out using 1,100- L plastic limnocorrals to examine cyanobacterial community response to three nitrogen forms, including nitrate, ammonium, and urea (added as 600 µ g N/L). Cell pigments and counts were used to calculate cell- specific pigment concentrations, and cell- associated microcystin concentrations were also measured to examine toxin response to a shift in nitrogen source. 3. Results showed that, upon nitrogen introduction, extracellular nitrogen quickly decreased in accordance with an increase in cellular phycocyanin 72 hr after fertilisation. Ammonium and urea treatments had more