EFFECT OF LYSOZYME (MURAMIDASE) ON MARINE AND FRESHWATER BLUE-GREEN ALGAE(1)

Area of Science:

• * Cyanophyceae (blue-green algae) research
• * Cell wall biology and osmotics

Background:

• * Blue-green algae possess unique cell wall structures.
• * Lysozyme (muramidase) is an enzyme that degrades peptidoglycans.

Purpose of the Study:

• * To investigate the effect of lysozyme on marine and freshwater blue-green algae.
• * To determine the ability of blue-green algae to form spheroplasts and protoplasts.
• * To measure the internal osmotic pressures of different blue-green algae species.

Main Methods:

• * Treatment of various marine and freshwater blue-green algae species with lysozyme.
• * Observation of cell wall changes and formation of spheroplasts/protoplasts.
• * Determination of approximate internal osmotic pressures.

Main Results:

• * Lysozyme treatment induced spheroplast formation in all tested blue-green algae species.
• * Protoplast formation was not observed in any species.
• * Spheroplast induction time varied significantly among species.
• * Marine blue-green algae generally displayed higher internal osmotic pressures compared to freshwater species.

Conclusions:

• * Blue-green algae can form spheroplasts when treated with lysozyme.
• * The cell wall composition and internal osmotic pressure influence the susceptibility to lysozyme and spheroplast formation.
• * Marine algae's higher osmotic pressure may contribute to differences in lysozyme sensitivity.