Abstract
We demonstrate high-throughput label-free single-cell image cytometry and image-based classification of Euglena gracilis (a microalgal species) under different culture conditions. We perform it with our high-throughput optofluidic image cytometer composed of a time-stretch microscope with 780-nm resolution and 75-Hz line rate, and an inertial-focusing microfluidic device. By analyzing a large number of single-cell images from the image cytometer, we identify differences in morphological and intracellular phenotypes between E. gracilis cell groups and statistically classify them under various culture conditions including nitrogen deficiency for lipid induction. Our method holds promise for real-time evaluation of culture techniques for E. gracilis and possibly other microalgae in a non-invasive manner.
Highlights
Recent technological advances have enabled microalgae-based engineering of bioproducts [1,2]
We demonstrate high-throughput label-free single-cell image cytometry and image-based classification of Euglena gracilis under different culture conditions
We perform it with our highthroughput optofluidic image cytometer composed of a time-stretch microscope with 780-nm resolution and 75-MHz line rate, and an inertial-focusing microfluidic device
Summary
Recent technological advances have enabled microalgae-based engineering of bioproducts [1,2].
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