光强度对各种微藻在高CO2度下生长的生长和生物化学组成的影响
Elizaveta A Chunzhuk1, Anatoly V Grigorenko1, Sophia V Kiseleva1,2
1Joint Institute for High Temperatures of the Russian Academy of Sciences, 125412 Moscow, Russia.
Plants (Basel, Switzerland)
|November 25, 2023
概括
增加光强度可以提高微藻生物质的生产率,并可以促进生物柴油的脂质生产. 这项研究在不同的光照条件下研究了五种微藻菌株,以优化二氧化碳吸收.
科学领域:
- 生物技术和生物工程 生物技术和生物工程
- 环境科学与工程环境科学与工程
- 藻类生物学和培养
背景情况:
- 微藻类是现代能源解决方案中大气二氧化碳吸收的有希望的技术.
- 在高二氧化碳度下优化微藻的生产力对于有效的二氧化碳捕获至关重要.
- 了解环境因素的影响,如光强度,是最大限度地提高微藻种植的关键.
研究的目的:
- 研究不同光强度对五种不同微藻菌株生物质生长的影响.
- 在不同的照明水平下分析微藻的生化成分变化.
- 确定最佳的光照条件,以提高微藻的生产力和生物燃料生产潜力.
主要方法:
- 在6%的二氧化碳下种植五种微藻菌株 (Arthrospira platensis,Chlorella ellipsoidea,Chlorella vulgaris,Gloeotila pulchra和Elliptochloris subsphaerica).
- 暴露于五种不同的光强度:80,120,160,200和245μmol量子·m-2·s-1.
- 使用甲蓝的细胞化学染色和生物质生长和生物化学成分的测量来评估细胞活力.
主要成果:
- 菌表现出最大的生长速度 (0.78 g·L-1·d-1) 在245 μmol量子·m-2·s-1.
- 埃利普托克洛里斯亚球体和阿瑟斯皮拉平原体在160和245μmol量子·m-2·s-1时分别显示出显著的增长.
- 增加的光强度导致C. vulgaris和A. platensis的蛋白质含量降低,而A. platensis的脂质含量略有增加.
结论:
- 微藻生物质的生产力可以通过增加光强度来显著提高.
- 特定的微藻菌株在更高的照明下显示出增加脂质积累的潜力,这表明在生物柴油生产中的应用.
- 优化光线条件对于最大限度地提高基于微藻的碳捕获和生物燃料生成效率至关重要.
相关概念视频
01:23Microbial Growth Measurement: Direct Methods
Direct methods for measuring microbial populations in a culture are essential tools in microbiology, providing quantitative data for various applications. Among these, microscopic counts, plate counts, and serial dilution are widely used techniques, each with unique principles and applications.Microscopic CountsMicroscopic counting involves the use of a Petroff-Hausser chamber, a specialized microscope slide with a grid and defined depth. By observing a liquid culture under a microscope,...
01:27Microbial Growth Measurement: Indirect Methods
Estimating microbial growth is essential for understanding population dynamics and environmental adaptations. Indirect methods provide valuable insights by measuring parameters such as turbidity, metabolic activity, and biomass, enabling efficient and reproducible assessments.During exponential growth, microbial cells scatter light proportionally to their biomass, a principle used in turbidity measurements. About one million cells per milliliter produce detectable scattering, which a...
01:28Overview of Algae
The kingdom Archaeplastida encompasses red and green algae, along with land plants. Unlike other protists with chloroplasts that arose through secondary endosymbiosis, only red and green algae originated from primary endosymbiotic events. This diverse group of eukaryotic organisms contains chlorophyll and performs oxygenic photosynthesis.Algae exist in various forms, from large brown kelp in coastal waters to green scum in puddles and stains on rocks or soil. Some species are responsible for...
01:21Green Algae
Green algae, also referred to as chlorophytes, are different from red algae in having the chloroplasts containing chlorophylls a and b, which give them their distinct green hue. However, they lack phycobiliproteins, preventing them from developing the red or blue-green pigmentation seen in red algae. In terms of photosynthetic pigment composition, green algae closely resemble plants and share a close evolutionary relationship with them. Taxonomically Green algae belong to Phylum Chlorophyta in...
01:19Other Algae
The group Stramenopiles include some phototrophic microorganisms. Members of this group possess flagella covered in numerous short, hairlike extensions, a feature that inspired the group's name, derived from the Latin words for "straw" and "hair." Some of the main categories of Stramenopiles include diatoms, golden algae, and brown algae.Diatoms are unicellular, photosynthetic eukaryotes, with over 200 known genera. They play a key role in the planktonic communities of both marine and...
01:25Biofuels
The microbial conversion of organic matter into biofuels holds potential as a renewable energy source. Among biofuel sources, microalgae are recognized as a highly efficient and adaptable feedstock for biodiesel production, owing to their rapid biomass accumulation, elevated lipid productivity, and capacity to proliferate in diverse aquatic systems, including freshwater, marine, and wastewater habitats. Unlike terrestrial crops, microalgae do not compete for land and can achieve significantly...