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Effect of Protozoa on Bacterial Degradation of an Aromatic Compound

机译：原生动物对芳香族化合物细菌降解的影响

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Prototrophic and growth factor-requiring strains of Alcaligenes spp. were used to study the effect of a protozoan, Tetrahymena pyriformis, on the degradation of p-aminobenzoate. The protozoan inhibited activity of the prototrophic bacterium by reducing its population size. For the growth factor-requiring strain of Alcaligenes, T. pyriformis provided the required growth factors so that the predator permitted the bacteria to grow and to continue p-aminobenzoate degradation. T. pyriformis inhibited bacterial activity when the amino acid supply was in excess, but activity of the auxotrophic strain of Alcaligenes was stimulated by the protozoan when the amino acid supply was limiting, although the bacterial population size was reduced by the protozoan.
机译：Alcaligenes spp的原养型和需要生长因子的菌株。被用来研究原生动物，Teyrhymena pyriformis，对对氨基苯甲酸酯降解的影响。原生动物通过减少其种群大小来抑制原生营养细菌的活性。对于需要增加生长因子的产碱菌菌株，T。pyriformis提供了所需的生长因子，因此捕食者允许细菌生长并继续对氨基苯甲酸酯降解。当氨基酸供应过多时，梨形梭菌会抑制细菌活性，但是当氨基酸供应受到限制时，原生动物会刺激产碱菌的营养缺陷型菌株的活性，尽管细菌种群的大小由于原生动物而减少。

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