Visualizing "green oil" in live algal cells.

Area of Science:

• * Biotechnology and Algal Research
• * Cell Biology and Microscopy

Background:

• * Accurate quantification and isolation of lipid-rich microalgae are crucial for biofuel and nutraceutical applications.
• * Traditional methods for lipid analysis in algae can be time-consuming and may require cell fixation, limiting live-cell applications.

Purpose of the Study:

• * To evaluate BODIPY 505/515 as a vital stain for visualizing lipid bodies in live algal cells.
• * To assess the utility of BODIPY 505/515 staining in conjunction with fluorescent activated cell sorting (FACS) for high-throughput detection and isolation of lipid-accumulating algae.

Main Methods:

• * Live algal cultures were stained with BODIPY 505/515, a lipophilic fluorescent dye.
• * Stained cells were analyzed using fluorescence microscopy to confirm lipid body visualization.
• * Fluorescent activated cell sorting (FACS) was employed to sort algal cells based on their fluorescence intensity, indicative of lipid content.

Main Results:

• * BODIPY 505/515 effectively and selectively stained the oil-containing lipid bodies in live algal cells, demonstrating its suitability as a vital stain.
• * The staining allowed for clear visualization of lipid distribution within the cells.
• * FACS analysis successfully differentiated algal cells based on lipid content, enabling the detection and isolation of cells with high lipid accumulation.

Conclusions:

• * BODIPY 505/515 is a reliable and efficient vital stain for algal lipid bodies.
• * Combining BODIPY 505/515 vital staining with FACS provides a powerful tool for identifying and isolating high-lipid-content algal strains for biotechnological purposes.