Table 1.

The limits of pH and morphological disturbances at a low and high pH.

Taxa	pH Limits	Morphological and Physiological Features Change at pH < 4	Morphological and Physiological Features at pH > 10
Bracteacoccus minor	4–10	Complete discoloration and destruction of cells; the appearance of orange granules	Discoloration and destruction of cells
Chlorococcum infusionum	4–9.5	Discoloration and destruction of cells; the appearance of large granules in cytoplasm	Discoloration and destruction of cells, appearance of large granules in cytoplasm
Chlorella vulgaris	4–11.5	Discoloration of cells	Discoloration of cells
Pseudococcomyxa simplex	4–11.5	Discoloration and “wrinkling” of cells; appearance of almost round cells	Discoloration of cells
Vischeria magna	3.5–11	Discoloration and appearance of the orange granules in cells; maximal zoospores production at pH 3.5; increase in cell volume	Discoloration of cells