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Removal of the initial phenol (500 mg L−1) by the bacterial strains alone (A) and by bacteria and duckweed combined (B). Negative control is (A) a sterile MS solution with phenol; (B) sterile duckweeds in an MS solution with phenol. Numbers in the legend represent bacterial strains used in the experiment: 9—K. oxytoca, 11—Lelliottia sp., 14—K. oxytoca, 27—S. marcescens, 37—H. alvei, 43—H. paralvei, 51—S. nematodiphila. Data represent the mean ± SE (n = 3).
