两种开花形成的淡水蓝藻菌的储存和利用策略
Man Xiao1,2, Michele A Burford2, Matthew J Prentice2,3
1State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, People's Republic of China.
Proceedings. Biological sciences
|July 19, 2023
概括
淡水蓝藻如Raphidiopsis raciborskii和Chrysosporum ovalisporum表现出不同的 (P) 吸收策略. 诸如性酸酶活性 (APA) 和固定等适应因素影响它们在低营养水中的生存.
科学领域:
- * 水生微生物学
- * 淡水生态学 淡水生态学
- * 蓝藻细菌生理学
背景情况:
- * (P) 和 (N) 是水生生物的关键营养素.
- * 菌在淡水生态系统中营养循环中发挥关键作用.
- *了解营养获取策略对于预测蓝藻细菌繁殖动态至关重要.
研究的目的:
- * 为了研究细胞储存,溶解无机 (DIP) 吸收,性酸酶活性 (APA) 和溶解无机 (DIN) 在两种蓝藻细菌物种之间的关系.
- * 为了在不同的营养条件下比较Raphidiopsis raciborskii和Chrysosporum ovalisporum的P获取策略.
- * 阐明和在蓝藻细菌适应寡质环境中的相互作用.
主要方法:
- *研究了六个Rafhidiopsis raciborskii菌株和两种Chrysosporum ovalisporum菌株.
- *使用33P的纳入和APA作为溶解有机 (DOP) 使用的代理来测量DIP吸收动力学.
- *分析数据考虑了细胞P配额,DIN可用性和生长阶段.
主要成果:
- * DIP摄入量遵循了经过修改的迈凯利斯-门动力学,受DIN和P可用性的影响.
- *高亲和度DIP吸收和APA被激活在P配额值≤0.01μg Pμg-1C以下.
- * Chrysosporum ovalisporum的APA和P配额较高,但与R. raciborskii相比,DIP吸收亲和力较低.
- *C. ovalisporum的DIP需求随着固化而增加,与R. raciborskii不同.
结论:
- * 蓝藻菌种和菌株具有不同的策略来应对P限制条件.
- * 和的可用性之间的相互作用显著影响蓝藻细菌生理学和竞争.
- * 像APA和隔膜这样的生理适应对于在营养缺乏的水生生态系统中蓝藻细菌的主导地位至关重要.
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