丝状藻响应温度变化的生长及功能特性
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X534

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国家自然科学基金(51078341、50938007);国家水体污染控制与治理科技重大专项(2017ZX07401003)


Growth and functional traits in filamentous algae responding to temperature
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    摘要:

    针对近年来丝状蓝藻水华的频繁暴发问题,研究了3种常见丝状藻生长对温度的响应以及生长与功能特性间的关系。结果表明:温度由15℃增加至30℃,拟柱孢藻比生长速率由0.28 d-1增加为0.70 d-1,光合活性(Fv/Fm)在0.40~0.61范围内波动,单位藻细胞溶解性总氮(DTN)和溶解性反应磷(SRP)消耗量也分别增加了6.36 mg-DTN/mg-Chl.a、0.15 mg-SRP/mg-Chl.a;伪鱼腥藻比生长速率从0.12 d-1到0.60 d-1Fv/Fm在15℃时达到最低,为0.12,单位藻细胞氮磷消耗量也分别增加了21.72 mg-DTN/mg-Chl.a、1.71 mg-SRP/mg-Chl.a;水华束丝藻比生长速率从0.20 d-1到0.44 d-1Fv/Fm受影响较小,单位藻细胞氮磷消耗量也分别增加了12.29 mg-DTN/mg-Chl.a、0.83 mg-SRP/mg-Chl.a。温度升高都会促进3种丝状藻生长,拟柱孢藻易在大于30℃高温下形成优势;伪鱼腥藻温度适应范围广,但温度低于15℃会抑制伪鱼腥藻生长;水华束丝藻最佳生长温度为25℃,并可在15℃时取得优势,耐低温能力较强。另外,丝状藻可通过权衡藻细胞生理特性以维持不同温度下的生长优势。

    Abstract:

    In view of the frequent blooms of filamentous cyanobacteria in recent years, the response of growth to temperature and the relationship between growth and functional characteristics of three common filamentous algae were studied.The results showed that when the temperature increased from 15℃ to 30℃, the specific growth rate of Cylindrospermopsisraciborskii increased from 0.28 d-1 to 0.70 d-1, the photosynthetic activity (Fv/Fm) fluctuated within the range of 0.40 to 0.61, and the consumption of dissolved total nitrogen (DTN) and soluble reactive phosphorus (SRP) per unit algal cell also increased by 6.36 mg-DTN/mg-Chl.a and 0.15 mg-SRP/mg-Chl.a. The specific growth rate of Pseudanabaena sp. increased from 0.12 d-1 to 0.60 d-1, the Fv/Fm reached a minimum of 0.12 at 15℃, and the consumption of nitrogen and phosphorus per unit of algal cell increased by 21.72 mg-DTN/mg-Chl.a and 1.71 mg-SRP/mg-Chl.a. The specific growth rate of Aphanizomenonflos-aquae increased from 0.20 d-1 to 0.44 d-1, the Fv/Fm was less affected, and the nitrogen and phosphorus consumption per unit algal cell increased by 12.29 mg-DTN/mg-Chl.a and 0.83 mg-SRP/mg-Chl.a. Then, the increased temperature will promote the growth of three filamentous algae. The Cylindrospermopsisraciborskii is easy to form an advantage when the temperature higher than 30℃. The Pseudanabaena sp. has a wide range of temperature adaptation, but when the temperature is belower than 15℃, its growth will be inhibited. The optimal temperature of the Aphanizomenonflos-aquae is 25℃, and it can also achieve advantages at a lower temperature of 15℃, and has strong low temperature resistance. In addition, filamentous algae can maintain the growth advantages at different temperatures by balancing the physiological characteristics of algal cells.

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高京,曹晶,储昭升,侯泽英,杨永哲.丝状藻响应温度变化的生长及功能特性[J].土木与环境工程学报(中英文),2020,42(6):196-204.

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  • 收稿日期:2020-04-21
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  • 在线发布日期: 2020-11-26
  • 出版日期: 2020-12-31