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Hui Zhang¹, Wei Hu¹, Ruidan Liu¹

¹Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education), Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai International Advanced Research Institute (Shenzhen Futian), Nankai University, Tianjin, China.

Environmental microbiology

|November 15, 2023

概括

低核酸 (LNA) 细菌在脉冲的营养输入下壮成长,显示出更多的丰富性和活力. 然而,高核酸 (HNA) 细菌对于社区范围内的碳循环至关重要,无论营养输入模式如何.

科学领域:

微生物学微生物学
环境科学环境科学
生物化学生化学

背景情况:

浮游生物细菌分为高核酸 (HNA) 和低核酸 (LNA) 含量类型.
由于不同的输入方式,环境营养素的可用性异质.
了解细菌对营养动态的反应是微生物生态学的关键.

研究的目的:

为了研究HNA和LNA细菌对连续或脉冲葡萄糖添加的差异反应.
阐明这些反应背后的代谢和分子机制.
确定HNA和LNA细菌在不同营养条件下的碳循环中的作用.

主要方法:

用连续或脉冲添加葡萄糖化细菌培养.
细胞丰度和活力的量化.
结构方程建模用于分析代谢途径和能量储存.
测量蛋白质和多糖的含量.
随机森林建模以评估细菌种类对葡萄糖代谢的影响.

主要成果:

与连续治疗的LNA细菌相比,脉冲治疗的LNA细菌显示出明显更高的细胞丰度和活力.
HNA细菌没有表现出适应脉冲治疗的情况.
LNA细菌表现出灵活的能量储存和利用,具有更高的路径系数,将生长,碳节约路径,ATP和聚酸盐联系起来.
脉冲处理的LNA细菌积累了更多的蛋白质和多糖,提高了它们的耐力和反应.
HNA的基石类型与糖解有更强的相关性,并且对于将葡萄糖引入社区元素循环至关重要.

结论:

LNA细菌对脉冲营养环境具有独特的适应策略,涉及高效的能源管理和生物质积累.
在微生物群体中,HNA细菌在加工葡萄糖方面发挥着一致的,至关重要的作用,不管营养的输入模式如何.
这项研究为了解细菌对动态碳可用性的反应提供了一个系统的框架,突出了HNA和LNA细菌的专业作用.

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