相关实验视频

Updated: Jun 28, 2025

Measuring Phosphorus Release in Laboratory Microcosms for Water Quality Assessment

Measuring Phosphorus Release in Laboratory Microcosms for Water Quality Assessment

Published on: July 22, 2019

在全球变化下的土壤中的微生物循环基因

Xuewei Wang¹, Hui Guo², Jianing Wang¹

¹State Key Laboratory of Herbage Improvement and Grassland Agro-Ecosystems, Centre for Grassland Microbiome, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, Gansu, China.

Global change biology

|April 15, 2024

概括

气候变化影响了西藏高山土壤中的循环. 气候变暖和降雨量增加促进微生物循环,增加了植物和微生物的P可用性.

科学领域:

环境科学环境科学
微生物学微生物学
土壤科学土壤科学

背景情况:

气候变化,特别是气候变暖和降水变化,显著影响了高山生态系统中的生物地球化学循环.
在西藏高原的P限高山草原土壤中 (P) 循环对环境变化敏感.
气候变化对细菌循环基因 (PCG) 和P转换的影响在这些生态系统中仍然不太清楚.

研究的目的:

研究变暖和改变降水对土壤PCG和P转化的单独和综合影响.
了解细胞外和细胞内P循环基因对气候变化因素的反应.
在不断变化的气候条件下,确定参与P循环的关键微生物代谢途径.

主要方法:

用转基因组分析来评估细菌PCG群体.
一个操纵实验模拟了变暖和改变了降水场景.
测量了土壤中的生物可利用 (Olsen-P) 和有机 (NaOH-Po).

主要成果:

变暖和降水增加分别增加了13%和20%的生物可用P (AP),主要是通过增强的有机P水解.
降水量减少导致土壤AP减少5.3%.
PCG的丰富性和丰富性比改变的降水更容易受到变暖的影响,而加热和降水增加的结合显示出积极的影响,而不是单个因素.

结论:

变暖,特别是与降水增加相结合时,显著增强微生物P循环,加速细胞外和细胞内过程.
特定的细胞内PCG参与酸盐代谢,转移酶系统,氧化酸化和与P池相关的 purin代谢.
变暖刺激了带有细胞外P循环基因 (phoD,phoX) 的细菌,促进了高山土壤中的有机P矿化和P生物可用性.

关键词:

阿尔卑斯山草原的草地全球变暖全球变暖微生物社区的微生物社区.在的循环循环中.降水变化降水变化温度上升温度上升温度上升

更多相关视频

Extraction and Analysis of Microbial Phospholipid Fatty Acids in Soils

Extraction and Analysis of Microbial Phospholipid Fatty Acids in Soils

Published on: August 26, 2016

A Lipid Extraction and Analysis Method for Characterizing Soil Microbes in Experiments with Many Samples

A Lipid Extraction and Analysis Method for Characterizing Soil Microbes in Experiments with Many Samples

Published on: July 16, 2017

相关概念视频

The Phosphorus Cycle

The Phosphorus Cycle

Unlike carbon, water, and nitrogen, phosphorus is not present in the atmosphere as a gas. Instead, most phosphorus in the ecosystem exists as compounds, such as phosphate ions (PO43-), found in soil, water, sediment and rocks. Phosphorus is often a limiting nutrient (i.e., in short supply). Consequently, phosphorus is added to most agricultural fertilizers, which can cause environmental problems related to runoff in aquatic ecosystems.

Bioremediation

Bioremediation

Bioremediation is the use of prokaryotes, fungi, or plants to remove pollutants from the environment. This process has been used to remove harmful toxins in groundwater as a byproduct of agricultural run-off and also to clean up oil spills.

What are Biogeochemical Cycles?

What are Biogeochemical Cycles?

The most common elements in organic molecules, carbon, hydrogen, oxygen, nitrogen, sulfur, and phosphorus, are only available in the ecosystem in limited amounts. Therefore, these nutrients must be recycled through both biotic and abiotic components of the ecosystem, in processes generally called biogeochemical cycles.