Related Experiment Video
Updated: Aug 29, 2025
A Femtoliter Droplet Array for Massively Parallel Protein Synthesis from Single DNA Molecules
Published on: June 20, 2020
A microfluidic droplet array demonstrating high-throughput screening in individual lipid-producing microalgae
Guoxia Zheng1, Furong Gu1, Yutong Cui1
1Environmental and Chemical Engineering Institute, Dalian University, Dalian, 116622, China; Dalian Key Laboratory of Oligosaccharide Recombination and Recombinant Protein Modification,Dalian, 116622, China.
This study introduces a microfluidic droplet platform for high-throughput screening of microalgae, accelerating the identification of efficient strains for renewable oil production. The system enables real-time monitoring of individual cells, revealing lipid accumulation and proliferation patterns.
Area of Science:
- Biotechnology
- Microfluidics
- Renewable Energy
Background:
- Microalgae are promising feedstocks for renewable oil but require efficient screening methods.
- Current methods for selecting microalgae species and optimizing culture conditions are laborious and slow.
Purpose of the Study:
- To develop a high-throughput microfluidic platform for rapid screening and analysis of individual microalgae.
- To enable real-time monitoring of lipid accumulation and cell proliferation at the single-cell level.
Main Methods:
- A microfluidic droplet-based system with a resolution of 2 x 10^3 was developed.
- The platform integrates novel fluid-blocking-based droplet generation and trapping for operational simplicity, rapidity, and stability.
- The system was used to screen three unicellular algae species: Isochrysis zhanjiangensis, Platymonas subcordiformis, and Platymonas helgolandica var. tsingtaoensis.
Main Results:
- The platform successfully enabled in situ bioassays of lipid accumulation and cell proliferation at the single-cell level for interspecies comparison.
- Lipid production inhomogeneity was observed among cells within the same species and batch.
- Nitrogen stress was identified as a condition inducing a positive-skewed frequency distribution of lipid content, even in inhomogeneous individual cells.
Conclusions:
- The developed microfluidic platform significantly accelerates microalgae screening and analysis.
- The system provides valuable insights into single-cell lipid production dynamics and responses to environmental conditions.
- This technology holds great potential for single-cell isolation and screening, advancing renewable oil production from microalgae.
