相关实验视频

Updated: May 6, 2026

Localization and Relative Quantification of Carbon Nanotubes in Cells with Multispectral Imaging Flow Cytometry

Localization and Relative Quantification of Carbon Nanotubes in Cells with Multispectral Imaging Flow Cytometry

Published on: December 12, 2013

纳米尺度元素和形态成像的固的蓝藻细菌

Bobby G Duersch¹, Steven A Soini¹, Yanqi Luo²

¹Department of Chemistry and Biochemistry, Department of Ocean and Mechanical Engineering, Florida Atlantic University, Boca Raton, FL, USA.

Metallomics : integrated biometal science

|September 13, 2024

概括

固定的蓝藻细菌,如Anabaena sp. 这样的. 使用细胞分化来管理稀缺的营养素. 微量营养素映射揭示了异构体中明显的元素分布,这对于固定至关重要.

科学领域:

微生物学微生物学
生物物理学的生物物理.
生物化学生物化学

背景情况:

固定的蓝藻细菌,如Anabaena sp.,对于全球循环至关重要.
这些生物体分化为专门的异质囊,在缺乏的条件下固定大气.
了解细胞元素稳态是优化固化的关键.

研究的目的:

研究微量营养素在Anabaena sp.中的分布和作用. 在固定的过程中.
与植物细胞相比,阐明异体细胞的元素组成.
探索聚酸盐体在营养管理和金属封存中的功能.

主要方法:

同步射线X射线光 (XRF) 地图 (2D和3D) 的冷水化阿纳贝纳 sp. 细胞. 细胞. 细胞.
X射线光光谱学和能量分散式X射线微分析用于元素映射.
多式成像包括原子力显微镜,扫描电子显微镜和光显微镜.
基于机器学习的k-mean集群用于分析元素关联.

主要成果:

异体细胞显示出比植物细胞更高的K +,Ca2 +和Fe2 +细胞溶液度.
多酸盐体与K+共同局部化,并隔离了各种金属离子 (Mg2+,Ca2+,Fe2+,Mn2+).
元素集群揭示了特定的关联:P/K集群与Fe或Ca,以及单个Fe或Ca集群.
在XRF纳米图谱中,可视化了细胞外附近的P/K集群,周围环绕着富含Ca的集群;Fe出现在不规则的集群中.

结论:

菌异质囊表现出独特的微量营养素配置,支持它们在固定的专门功能.
多酸盐体在细胞内营养储存和金属离子恒温中发挥着重要作用.
多模态XRF成像提供了前所未有的洞察力元素分布和细胞过程在diazotrophic蓝藻细菌.

关键词:

蓝藻细菌是一种蓝藻细菌基本的绘制元素映射.能量分散式X射线分析同步 X 射线光光学

更多相关视频

In Situ Detection and Single Cell Quantification of Metal Oxide Nanoparticles Using Nuclear Microprobe Analysis

In Situ Detection and Single Cell Quantification of Metal Oxide Nanoparticles Using Nuclear Microprobe Analysis

Published on: February 3, 2018

Visualization of DNA Compaction in Cyanobacteria by High-voltage Cryo-electron Tomography

Visualization of DNA Compaction in Cyanobacteria by High-voltage Cryo-electron Tomography

Published on: July 17, 2018

相关概念视频

Inorganic Nitrogen Assimilation

Inorganic Nitrogen Assimilation

Nitrogen is an essential element in biological systems, forming a crucial component of proteins, nucleic acids, and other cellular constituents. Many bacteria and archaea acquire nitrogen in the form of nitrate (NO₃⁻) or ammonia (NH₃), which are then assimilated into biomolecules through specific enzymatic pathways.Assimilatory Nitrate ReductionWhen nitrate enters the cell, it undergoes a two-step reduction process known as assimilatory nitrate reduction. Initially, the enzyme...

Bacterial Phylum Cyanobacteria

Bacterial Phylum Cyanobacteria

Cyanobacteria are a diverse group of oxygenic, phototrophic bacteria that played a pivotal role in converting Earth’s atmosphere from anoxic to oxygen-rich billions of years ago. They exhibit remarkable morphological diversity, ranging from unicellular forms to filamentous types, with cell sizes varying between 0.5 μm and 100 μm. Cyanobacteria are classified into five groups: Chroococcales (unicellular, dividing by binary fission), Pleurocapsales (unicellular, dividing by...